Image Trace: Snap Curves To Lines levels lines a degree or two askew

The documented option "replaces slightly curved lines with straight lines and snaps lines near 0 or 90 degrees
to absolute 0 or 90 degrees" (helpx, Image Trace panel options); ours did the first half only.

- With Snap Curves To Lines, a straight piece at least 2 px long and within 2.5 degrees of level or upright is
  made exactly so, by moving its ends across it to their mean (the page gives no angle: 2.5 degrees is our
  choice). The pieces next to a moved end follow it.
- A junction other regions share stays where it is, so abutting regions still have one curve along their edge;
  a line between a junction and a free end is levelled to the junction.
- The harness gains askew inputs (a rectangle, a plus sign and two lines, 1 to 2 degrees off level and upright)
  and an "upright %" column: the share of the outline length that is exactly level or upright.

On the clean askew inputs (docs/image-trace-quality.md): Black and White Logo and Technical Drawing, the presets
with the option on, go from 0% to 91% and 95% of their outline exactly level or upright. Their outlines are then
0.49 and 0.59 px from the art as drawn where they were 0.05 (4.2 px at the far end of a 300 px side turned 1.5
degrees): that distance is what the option is for. Presets without the option are unchanged.

crates/engine/src/cmd/buildcmds.rs

@@ -120,7 +120,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Make",
             ["Object", "Image Trace"],
             None,
-            "{id?: image or Image Trace group (default: selection), preset?: name (imageTrace.presets), params?: {mode: \"blackAndWhite\"|\"grayscale\"|\"color\"|\"logo\", threshold: 0-255, palette: \"limited\"|\"fullTone\"|\"automatic\"|\"documentLibrary\" (color mode; limited: the `colors` best colours, fullTone: as many as the tones need, more with colorDetail, automatic: flat art with its own colours, else fullTone, documentLibrary: at most `colors` of the library's colours, as they are), colors: 2-256, colorDetail: 0-100 (fullTone, automatic), library: \"document\" (the document's swatches) or a swatch library id or name (swatch.library.list; documentLibrary), paths: 0-100, corners: 0-100, noise: px, method: \"abutting\"|\"overlapping\", ignoreWhite, snapCurvesToLines, fills: true, strokes: false (Create: lines up to strokeWidth wide become stroked centre lines; without fills, wider areas become stroked outlines), strokeWidth: px (10), logoColors?: [\"#rrggbb\"…] (mode logo: flat-colour logos only; colours found automatically or named here, white is always its own colour, at most ten; noise = areas under noise/10 px ignored; edges to a fraction of a pixel, sharp corners restored, lines and circles snapped; enclosed transparent areas are painted white unless ignoreWhite makes them holes; fills/strokes are ignored; gradients and photos are refused)}, view?: as imageTrace.setView (default: the traced object's own, else tracingResult), ids?: [id…] (instead of id)} → {id, paths, anchors, colors}",
+            "{id?: image or Image Trace group (default: selection), preset?: name (imageTrace.presets), params?: {mode: \"blackAndWhite\"|\"grayscale\"|\"color\"|\"logo\", threshold: 0-255, palette: \"limited\"|\"fullTone\"|\"automatic\"|\"documentLibrary\" (color mode; limited: the `colors` best colours, fullTone: as many as the tones need, more with colorDetail, automatic: flat art with its own colours, else fullTone, documentLibrary: at most `colors` of the library's colours, as they are), colors: 2-256, colorDetail: 0-100 (fullTone, automatic), library: \"document\" (the document's swatches) or a swatch library id or name (swatch.library.list; documentLibrary), paths: 0-100, corners: 0-100, noise: px, method: \"abutting\"|\"overlapping\", ignoreWhite (leave out white areas), ignoreColor?: \"#rrggbb\" (with ignoreWhite: the colour left out instead of white), snapCurvesToLines, fills: true, strokes: false (Create: lines up to strokeWidth wide become stroked centre lines; without fills, wider areas become stroked outlines), strokeWidth: px (10), logoColors?: [\"#rrggbb\"…] (mode logo: flat-colour logos only; colours found automatically or named here, white is always its own colour, at most ten; noise = areas under noise/10 px ignored; edges to a fraction of a pixel, sharp corners restored, lines and circles snapped; enclosed transparent areas are painted white unless ignoreWhite makes them holes; fills/strokes are ignored; gradients and photos are refused)}, view?: as imageTrace.setView (default: the traced object's own, else tracingResult), ids?: [id…] (instead of id)} → {id, paths, anchors, colors}",
             has_selection_or_ids,
             |s, p| trace_make(s, p, false)
         ),

crates/engine/src/tests_build.rs

@@ -795,7 +795,8 @@ fn image_trace_presets_query_and_errors() {
     let mut s = session();
     let r = s.execute("imageTrace.presets", &json!({})).unwrap();
     let names: Vec<&str> = r["presets"].as_array().unwrap().iter().map(|p| p["name"].as_str().unwrap()).collect();
-    assert_eq!(names.len(), 13);
+    assert_eq!(names.len(), 15);
+    assert!(names.contains(&"Auto Color") && names.contains(&"Outline"));
     assert!(names.contains(&"Technical Drawing") && names.contains(&"Shades of Gray") && names.contains(&"Flat Logo"));
     let a = rect(&mut s, 0.0, 0.0, 10.0, 10.0);
     assert!(s.execute("imageTrace.make", &json!({"id": a.0})).is_err(), "not an image");

crates/eps/src/import/tests.rs

@@ -467,6 +467,22 @@ fn the_bounding_box_comes_from_the_header_or_the_trailer() {
     assert!(r.warnings.iter().any(|w| w.contains("first of the file's 2 pages")), "{:?}", r.warnings);
 }
 
+/// #1552: a Type 42 font's glyph space is one unit an em, so its identity FontMatrix scaled to 12
+/// sets 12 pt type (a Type 1's 0.001 matrix needs the 1000-unit space).
+#[test]
+fn type_42_fonts_set_type_at_their_size() {
+    for (kind, matrix) in [(42, "[1 0 0 1 0 0]"), (1, "[0.001 0 0 0.001 0 0]")] {
+        let body = format!(
+            "/T 10 dict begin /FontName /T def /FontType {kind} def /FontMatrix {matrix} def /Encoding StandardEncoding def currentdict end /T exch definefont pop \
+             /T findfont 12 scalefont setfont 10 20 moveto (Hi) show"
+        );
+        let r = read(&body);
+        let NodeKind::Text(t) = &objects(&r.document)[0].kind else { panic!("{:?}", r.warnings) };
+        let size = t.runs[0].style.size * t.xf.determinant().abs().sqrt();
+        assert!((size - 12.0).abs() < 1e-6, "FontType {kind}: {size} pt");
+    }
+}
+
 #[test]
 fn embedded_font_programs_are_skipped() {
     let body = "/MyFont 10 dict begin /FontName /MyFont def /FontMatrix [0.001 0 0 0.001 0 0] def currentdict end currentfile eexec\n\

crates/eps/src/import/text.rs

@@ -403,7 +403,10 @@ impl Interp<'_> {
         let f = font.borrow();
         let name = f.get(&Key::name("FontName")).and_then(Obj::text).map_or_else(|| DEFAULT_FONT.to_string(), |n| n.to_string());
         let m = f.get(&Key::name("FontMatrix")).and_then(|o| o.items().and_then(|i| matrix_of(&i.borrow()))).unwrap_or(Affine::scale(0.001));
-        Ok((name, m * Affine::scale(1000.0)))
+        // Type 1 glyphs are in 1000-unit space; a Type 42 font's glyph space is one unit an em
+        // (its FontMatrix, usually the identity, is already the em's).
+        let units = if f.get(&Key::name("FontType")).and_then(Obj::as_num) == Some(42.0) { 1.0 } else { 1000.0 };
+        Ok((name, m * Affine::scale(units)))
     }
 
     /// `s` (read as Latin-1) set in the current font at user point `at`: point type placed there,

crates/pdf/src/import.rs

@@ -26,6 +26,8 @@ use crate::import_shading::{clipped, extend_clip, fold_stop_opacity, gradient_sh
 use crate::import_text::{Families, LineFacts, Look, Placement, TextLine, Upright};
 use crate::{CropTo, ImportOptions, ImportReport, PdfError, TextAs};
 
+/// Mixed into an image's cache key when it is read white inside an alpha soft mask.
+const WHITE_KEY: u128 = 0x7717_e000_a1fa;
 /// The name of the paths text imports as.
 const TEXT_OUTLINES: &str = "<Text Outlines>";
 /// A page whose overprint (ISO 32000-1 §8.6.7) is left out rather than given to the wrong objects.
@@ -788,6 +790,10 @@ struct Builder<'p> {
     /// A transparency group was just pushed: a form's (whose flags come next) or an image's.
     pending: bool,
     nested: u32,
+    /// Reading an alpha soft mask's art: images are read white with their own alpha, so the
+    /// mask's luminance is their alpha, as whitened vector art's is (cairo, and so Inkscape,
+    /// rasterizes masks into such images).
+    white_images: bool,
     /// The last filled path: its node and its outline (a stroke of the same outline joins it).
     last_fill: Option<(NodeId, BezPath)>,
     /// What each line of type made tells beyond its text object ([`crate::import_lines`]).
@@ -930,6 +936,7 @@ impl<'p> Builder<'p> {
             marked: vec![],
             pending: false,
             nested: 0,
+            white_images: false,
             last_fill: None,
             lines: HashMap::new(),
         }
@@ -1299,7 +1306,10 @@ impl<'p> Builder<'p> {
             return s.clone();
         }
         let page = self.page;
-        let spec = match self.nested(page, |b| m.interpret(b)) {
+        let saved = std::mem::replace(&mut self.white_images, m.mask_type() == MaskType::Alpha);
+        let art = self.nested(page, |b| m.interpret(b));
+        self.white_images = saved;
+        let spec = match art {
             Some(art) => {
                 let [r, g, b, _] = m.background_color().to_rgba().components();
                 let backdrop = luminance(&Color::rgb(r, g, b));
@@ -1330,10 +1340,15 @@ impl<'p> Builder<'p> {
         {
             return Some(Paint::Pattern { pattern: name.clone(), xf });
         }
+        // A swatch is shared with uses outside an alpha mask, and pattern paints keep their
+        // colours there: its images are read as they are.
+        let white = std::mem::take(&mut self.white_images);
         let art = self.nested(Rect::ZERO, |b| {
             // A cell whose content can't be decoded is empty.
             let _ = t.interpret(b, Affine::IDENTITY, stroke);
-        })?;
+        });
+        self.white_images = white;
+        let art = art?;
         let sig = paints(&art);
         let entry = self.pattern_keys.entry(key).or_default();
         entry.0 += 1;
@@ -1834,12 +1849,14 @@ impl<'a> Device<'a> for Builder<'_> {
         self.pending = false;
         match image {
             Image::Raster(r) => {
-                let key = hayro_interpret::CacheKey::cache_key(&r);
+                let white = self.white_images;
+                // Inside an alpha mask the same image is read again, white (its own cache key).
+                let key = hayro_interpret::CacheKey::cache_key(&r) ^ if white { WHITE_KEY } else { 0 };
                 let st = r.stream();
                 let (w, h) = (r.width(), r.height());
                 // CMYK images keep their samples (read once per image).
-                let known = self.cmyk_keys.contains(&key);
-                let cmyk = if known {
+                let known = !white && self.cmyk_keys.contains(&key);
+                let cmyk = if known || white {
                     None
                 } else {
                     crate::import_image::cmyk(st, w, h).unwrap_or_else(|why| {
@@ -1858,7 +1875,8 @@ impl<'a> Device<'a> for Builder<'_> {
                 let dict = st.dict();
                 let filters = st.filters();
                 let cs_ok = dict.get::<Name<'_>>(b"ColorSpace").is_some_and(|n| matches!(n.as_ref(), b"DeviceRGB" | b"DeviceGray"));
-                let jpeg = filters.len() == 1
+                let jpeg = !white
+                    && filters.len() == 1
                     && matches!(filters[0], hayro_syntax::Filter::DctDecode)
                     && cs_ok
                     && !dict.contains_key(b"SMask")
@@ -1875,6 +1893,7 @@ impl<'a> Device<'a> for Builder<'_> {
                         let (w, h, sf) = (img.width(), img.height(), img.scale_factors());
                         let a = alpha.map(|a| resize_alpha(&a, w, h)).unwrap_or_else(|| vec![255; (w * h) as usize]);
                         let rgba: Vec<u8> = match img {
+                            _ if white => a.into_iter().flat_map(|a| [255, 255, 255, a]).collect(),
                             ImageData::Rgb(d) => d.data.as_chunks::<3>().0.iter().zip(a).flat_map(|(c, a)| [c[0], c[1], c[2], a]).collect(),
                             ImageData::Luma(d) => d.data.iter().zip(a).flat_map(|(g, a)| [*g, *g, *g, a]).collect(),
                         };
@@ -1890,11 +1909,13 @@ impl<'a> Device<'a> for Builder<'_> {
                 self.add_image(key, || rgba_png(rgba, w, h).map(|png| (ImageBlob::new("image/png", png), w, h)), xf);
             }
             Image::Stencil(s) => {
-                let key = hayro_interpret::CacheKey::cache_key(&s);
+                let white = self.white_images;
+                let key = hayro_interpret::CacheKey::cache_key(&s) ^ if white { WHITE_KEY } else { 0 };
                 let mut decoded: Option<Decoded> = None;
                 s.with_stencil(
                     |luma, paint| {
                         let rgb = match paint {
+                            _ if white => [255, 255, 255, 255],
                             hayro_interpret::Paint::Color(c) => c.to_rgba().to_rgba8(),
                             _ => [0, 0, 0, 255],
                         };

crates/pdf/src/tests_import_fidelity.rs

@@ -78,6 +78,58 @@ fn the_mask(d: &Document) -> (Node, OpacityMask) {
     (n, m)
 }
 
+/// The two pixels of the image a soft mask of kind `s` draws: black, opaque on the left and clear
+/// on the right (its own `/SMask`).
+fn mask_image_pixels(s: &str) -> [[u8; 4]; 2] {
+    let g = first_extra(1);
+    let group = stream(
+        &format!(
+            "/Type /XObject /Subtype /Form /BBox [0 0 100 100] /Group << /S /Transparency /CS /DeviceRGB >> /Resources << /XObject << /Im0 {} 0 R >> >>",
+            g + 1
+        ),
+        "q 100 0 0 100 0 0 cm /Im0 Do Q",
+    );
+    let image = stream(
+        &format!(
+            "/Type /XObject /Subtype /Image /Width 2 /Height 1 /ColorSpace /DeviceRGB /BitsPerComponent 8 /Filter /ASCIIHexDecode /SMask {} 0 R",
+            g + 2
+        ),
+        "000000000000>",
+    );
+    let smask =
+        stream("/Type /XObject /Subtype /Image /Width 2 /Height 1 /ColorSpace /DeviceGray /BitsPerComponent 8 /Filter /ASCIIHexDecode", "FF00>");
+    let bytes = one_page(
+        "/GS0 gs 1 0 0 rg 0 0 100 100 re f",
+        &format!("/ExtGState << /GS0 << /SMask << /Type /Mask /S /{s} /G {g} 0 R >> >> >>"),
+        &[&group, &image, &smask],
+    );
+    let d = open(&bytes);
+    let (_, m) = the_mask(&d);
+    let mut keys = vec![];
+    m.art.walk(&mut |n| {
+        if let NodeKind::Image(im) = &n.kind {
+            keys.push(im.key.clone());
+        }
+    });
+    let [key] = keys.as_slice() else { panic!("one image in the mask art: {keys:?}") };
+    let px = image::load_from_memory(&d.images[key].bytes).unwrap().to_rgba8();
+    [px.get_pixel(0, 0).0, px.get_pixel(1, 0).0]
+}
+
+/// An alpha soft mask whose art is an image with its own alpha (some PDF writers rasterize masks
+/// so): the image is read white with that alpha, so the mask's luminance is the alpha, not the
+/// image's colour (ISO 32000-1 11.5.2: an alpha mask takes the group's alpha, not its colour).
+#[test]
+fn an_alpha_soft_mask_of_an_image_uses_the_images_alpha() {
+    assert_eq!(mask_image_pixels("Alpha"), [[255, 255, 255, 255], [255, 255, 255, 0]]);
+}
+
+/// A luminosity soft mask takes the group's colour (ISO 32000-1 11.5.3): its image stays black.
+#[test]
+fn a_luminosity_soft_mask_of_an_image_keeps_the_images_colour() {
+    assert_eq!(mask_image_pixels("Luminosity"), [[0, 0, 0, 255], [0, 0, 0, 0]]);
+}
+
 #[test]
 fn a_luminosity_soft_mask_becomes_an_opacity_mask() {
     let d = open(&masked("/S /Luminosity", "1 1 1 rg 0 0 50 100 re f"));

crates/trace/src/fit.rs

@@ -60,6 +60,65 @@ fn before(a: Point, b: Point) -> std::cmp::Ordering {
     a.x.total_cmp(&b.x).then(a.y.total_cmp(&b.y))
 }
 
+/// Lines within this of level or upright are made exactly so (the tangent of 2.5°).
+const NEARLY_UPRIGHT: f64 = 0.0437;
+
+/// Snap Curves To Lines: the straight pieces of `segs` (a chain; `closed` when its end joins its
+/// start) that are within 2.5° of level or upright and at least 2 px long are made exactly level
+/// or upright, by moving their ends across them: both to their mean, or, in an open chain, the
+/// free end to the end that is fixed (a chain's own ends are junctions other regions share, and
+/// stay where they are). The pieces next to a moved end follow it.
+fn snap_upright(segs: &mut [Cubic], closed: bool) {
+    let n = segs.len();
+    let straight = |c: &Cubic| seg_dist(c[1], c[0], c[3]) < 1e-6 && seg_dist(c[2], c[0], c[3]) < 1e-6;
+    let lines: Vec<bool> = segs.iter().map(straight).collect();
+    // Anchor `i` starts piece `i`; an open chain has one more, at its end.
+    let fixed = |i: usize| !closed && (i == 0 || i == n);
+    let at = |segs: &[Cubic], i: usize| if i < n { segs[i][0] } else { segs[n - 1][3] };
+    let put = |segs: &mut [Cubic], i: usize, p: Point| {
+        let i = if closed { i % n } else { i };
+        let d = p - at(segs, i);
+        if i < n {
+            segs[i][0] = p;
+            segs[i][1] += d;
+        }
+        if let Some(before) = if i > 0 { Some(i - 1) } else { closed.then_some(n - 1) } {
+            segs[before][3] = p;
+            segs[before][2] += d;
+        }
+    };
+    for (i, &line) in lines.iter().enumerate() {
+        let (ia, ib) = (i, if closed { (i + 1) % n } else { i + 1 });
+        let (a, b) = (at(segs, ia), at(segs, ib));
+        let d = b - a;
+        if !line || d.hypot() < 2.0 || ia == ib {
+            continue;
+        }
+        let level = d.y.abs() <= NEARLY_UPRIGHT * d.x.abs();
+        if !level && d.x.abs() > NEARLY_UPRIGHT * d.y.abs() {
+            continue;
+        }
+        let pick = |p: Point| if level { p.y } else { p.x };
+        let to = match (fixed(ia), fixed(ib)) {
+            (true, true) => continue,
+            (true, false) => pick(a),
+            (false, true) => pick(b),
+            (false, false) => (pick(a) + pick(b)) / 2.0,
+        };
+        let moved = |p: Point| if level { Point::new(p.x, to) } else { Point::new(to, p.y) };
+        if !fixed(ia) {
+            put(segs, ia, moved(a));
+        }
+        if !fixed(ib) {
+            put(segs, ib, moved(b));
+        }
+    }
+    // A straight piece has its handles on it.
+    for (c, _) in segs.iter_mut().zip(&lines).filter(|(_, line)| **line) {
+        *c = [c[0], c[0] + (c[3] - c[0]) / 3.0, c[0] + (c[3] - c[0]) * (2.0 / 3.0), c[3]];
+    }
+}
+
 /// A whole loop fitted. The same loop gives the same curves whichever way it runs and wherever it
 /// starts (it is fitted clockwise from its leftmost point): the outline of a shape and the hole it
 /// leaves in the shape around it are one curve.
@@ -80,6 +139,9 @@ fn fit_closed(pts: &[Point], style: &Style) -> Option<Vec<Cubic>> {
     if stats.reverted > 0 && !all_within(&sample_cubics(&segs, 0.25), &resample_closed(&pts, 0.5).map_or_else(|| pts.clone(), |(p, _)| p), 1.5) {
         segs = polygon(&pts, style.tol);
     }
+    if style.upright {
+        snap_upright(&mut segs, true);
+    }
     Some(if flip { reversed(segs) } else { segs })
 }
 
@@ -107,6 +169,9 @@ fn fit_piece(pts: &[Point], style: &Style) -> Vec<Cubic> {
         let kept: Vec<Point> = (0..n).filter(|&i| keep[i]).map(|i| pts[i]).collect();
         segs = kept.windows(2).filter(|p| p[0] != p[1]).map(|p| [p[0], p[0], p[1], p[1]]).collect();
     }
+    if style.upright {
+        snap_upright(&mut segs, false);
+    }
     if flip { reversed(segs) } else { segs }
 }
 

crates/trace/src/lib.rs

@@ -269,8 +269,12 @@ pub struct TraceParams {
     /// `noise / 10` pixels of the source image.)
     pub noise: u32,
     pub method: Method,
-    /// Drop white areas (no white background shape).
+    /// Ignore Color: drop the areas of one colour (no background shape): white, unless
+    /// `ignore_color` names another.
     pub ignore_white: bool,
+    /// The colour Ignore Color leaves out (`#rrggbb`): the palette colours within about 30 levels
+    /// of it. `None` is white. (Flat Logo mode leaves out white only.)
+    pub ignore_color: Option<String>,
     /// Replace nearly-straight curves with straight lines. In Logo mode this also snaps tight arcs
     /// to true circles.
     pub snap_curves_to_lines: bool,
@@ -302,6 +306,7 @@ impl Default for TraceParams {
             noise: 25,
             method: Method::Abutting,
             ignore_white: false,
+            ignore_color: None,
             snap_curves_to_lines: false,
             fills: true,
             strokes: false,
@@ -324,8 +329,8 @@ impl TraceParams {
     }
     /// How outlines are fitted: Paths sets how closely the curves follow the edge (0.08 px at 100,
     /// 0.33 px at 50, 0.78 px at 0), Corners the turn that makes a corner (35° at 100, 90° at 0).
-    /// Straight edges are always lines; Snap Curves To Lines also straightens slightly curved ones
-    /// and makes parts of circles true arcs.
+    /// Straight edges are always lines; Snap Curves To Lines also straightens slightly curved ones,
+    /// makes parts of circles true arcs, and makes lines within 2.5° of level or upright exactly so.
     fn outline_style(&self) -> logo::Style {
         // Parameters come from users and agents: a NaN or infinity must not reach the geometry.
         let unit = |v: f64, default: f64| if v.is_finite() { (v / 100.0).clamp(0.0, 1.0) } else { default };
@@ -340,6 +345,7 @@ impl TraceParams {
             circle_tol: if snap { 0.3 } else { 0.15 },
             restore: Some(logo::RestoreParams::default()),
             check_step: 0.15,
+            upright: snap,
             ..logo::Style::default()
         }
     }
@@ -353,6 +359,7 @@ impl TraceParams {
 /// Built-in preset names in panel order (our own parameter sets).
 pub const PRESET_NAMES: &[&str] = &[
     "Default",
+    "Auto Color",
     "High Fidelity Photo",
     "Low Fidelity Photo",
     "3 Colors",
@@ -364,6 +371,7 @@ pub const PRESET_NAMES: &[&str] = &[
     "Silhouettes",
     "Line Art",
     "Technical Drawing",
+    "Outline",
     "Flat Logo",
 ];
 
@@ -392,6 +400,10 @@ pub fn preset(name: &str) -> Option<TraceParams> {
     };
     Some(match key.as_str() {
         "default" => d,
+        // A posterised image of a photo or of artwork: its own colours where it is flat art, as
+        // many as its tones need where it is not.
+        // (Color detail 85: a colour on a hundredth of the picture is still one of its colours.)
+        "auto color" => TraceParams { palette: Palette::Automatic, color_detail: 85.0, ..color(6, 65.0, 60.0, 16, Method::Abutting) },
         "high fidelity photo" => color(64, 90.0, 25.0, 4, Method::Overlapping),
         "low fidelity photo" => color(20, 60.0, 50.0, 12, Method::Overlapping),
         "3 colors" => color(3, 60.0, 60.0, 20, Method::Abutting),
@@ -403,6 +415,8 @@ pub fn preset(name: &str) -> Option<TraceParams> {
         "silhouettes" => bw(200, 40.0, 60.0, 30, false),
         "line art" => bw(128, 80.0, 70.0, 10, false),
         "technical drawing" => bw(128, 95.0, 90.0, 4, true),
+        // Black outlines: lines as stroked centre lines, wider areas as stroked outlines.
+        "outline" => TraceParams { fills: false, strokes: true, ..bw(128, 80.0, 70.0, 10, false) },
         // Flat-colour logos: colours found automatically, edges placed to a fraction of a pixel.
         "flat logo" => TraceParams { mode: Mode::Logo, colors: 8, paths: 60.0, corners: 50.0, noise: 6, snap_curves_to_lines: true, ..d },
         _ => return None,
@@ -446,6 +460,14 @@ fn is_white(c: [u8; 3]) -> bool {
     c.iter().all(|&v| v >= 245)
 }
 
+/// Whether Ignore Color leaves palette colour `c` out: `target` is the colour picked (`None`: white).
+fn is_ignored(c: [u8; 3], target: Option<[u8; 3]>) -> bool {
+    match target {
+        None => is_white(c),
+        Some(t) => (0..3).map(|k| (f64::from(c[k]) - f64::from(t[k])).powi(2)).sum::<f64>() <= 30.0 * 30.0 || (is_white(t) && is_white(c)),
+    }
+}
+
 /// Trace `img` with `params`. Failures (an image Logo mode refuses, say) give an empty result: use
 /// [`trace_within`] to see why.
 pub fn trace(img: &Raster, params: &TraceParams) -> TraceResult {
@@ -464,6 +486,11 @@ pub fn trace_within(img: &Raster, params: &TraceParams, max_anchors: usize) -> R
     if params.mode == Mode::Logo {
         return logo::trace_logo(img, params, max_anchors);
     }
+    // The colour Ignore Color leaves out, if not white.
+    let ignore = match &params.ignore_color {
+        Some(name) if params.ignore_white => Some(logo::parse_hex(name).ok_or_else(|| TraceError::BadPalette(name.clone()))?),
+        _ => None,
+    };
     // A photo is traced from a copy with its noise smoothed away (see `smooth`).
     let smoothed = (params.mode != Mode::BlackAndWhite && quantize::continuous_tone(img)).then(|| smooth::smoothed(img));
     let img = smoothed.as_ref().unwrap_or(img);
@@ -500,12 +527,13 @@ pub fn trace_within(img: &Raster, params: &TraceParams, max_anchors: usize) -> R
         rank[i] = r;
     }
     let layers: Vec<(usize, usize)> =
-        order.iter().copied().enumerate().filter(|&(_, ci)| !(params.ignore_white && is_white(q.palette[ci]))).collect();
+        order.iter().copied().enumerate().filter(|&(_, ci)| !(params.ignore_white && is_ignored(q.palette[ci], ignore))).collect();
     let job = Layers {
         q: &q,
         rank: &rank,
         params,
         img,
+        ignore,
         boxes,
         bw_tones: bw_tones(img, &q),
         style: params.outline_style(),
@@ -571,6 +599,8 @@ struct Layers<'a> {
     rank: &'a [usize],
     params: &'a TraceParams,
     img: &'a Raster,
+    /// The colour Ignore Color leaves out, if not white.
+    ignore: Option<[u8; 3]>,
     /// The box each palette entry's pixels lie in: `(x0, y0, x1, y1)`, the far sides excluded.
     boxes: Vec<Option<(usize, usize, usize, usize)>>,
     /// Black and White: the luminance of white and of black (see `bw_tones`).
@@ -590,7 +620,7 @@ impl Layers<'_> {
     /// Ignore White: white is no part of any layer (stacked layers reach under the layers above
     /// them, and must not reach under white that is left out).
     fn ignored(&self, label: u16) -> bool {
-        self.params.ignore_white && self.q.palette.get(label as usize).is_some_and(|c| is_white(*c))
+        self.params.ignore_white && self.q.palette.get(label as usize).is_some_and(|c| is_ignored(*c, self.ignore))
     }
     /// The region across a crack, for cutting outlines at their junctions: the outside pixel's
     /// colour. Stacked layers end on many colours at once and share no edge: one neighbour.

crates/trace/src/logo/mod.rs

@@ -26,5 +26,6 @@ mod unmix;
 
 pub(crate) use geom::{Cubic, all_within, resample_closed, resample_open, sample_cubics};
 pub(crate) use outline::{Stats, Style, fit_open, fit_outline};
+pub(crate) use palette::parse_hex;
 pub(crate) use pipeline::trace_logo;
 pub(crate) use restore::RestoreParams;

crates/trace/src/logo/outline.rs

@@ -25,6 +25,9 @@ pub(crate) struct Style {
     pub max_dev: f64,
     /// Spacing of the points of the fit that this check looks at.
     pub check_step: f64,
+    /// Straight pieces within a few degrees of level or upright are made exactly so (by the
+    /// tracer's other modes; Flat Logo leaves them).
+    pub upright: bool,
 }
 
 impl Default for Style {
@@ -42,6 +45,7 @@ impl Default for Style {
             restore: Some(RestoreParams::default()),
             max_dev: 1.4,
             check_step: 0.03,
+            upright: false,
         }
     }
 }

crates/trace/src/tests.rs

@@ -255,7 +255,7 @@ fn snap_curves_to_lines_straightens_near_lines() {
 
 #[test]
 fn presets_resolve() {
-    assert_eq!(presets().len(), 13);
+    assert_eq!(presets().len(), 15);
     for n in PRESET_NAMES {
         assert!(preset(n).is_some(), "{n}");
     }
@@ -1072,3 +1072,57 @@ fn a_blurred_thin_line_on_unevenly_lit_paper_is_a_few_anchors() {
     let off = along(path).iter().filter(|p| p.x > 14.0 && p.x < 146.0).map(|p| ((p.y - (17.3 + 0.06 * p.x)).abs() - 1.0).abs()).fold(0.0, f64::max);
     assert!(off < 0.5, "edges {off} px from where the ink's width puts them");
 }
+
+#[test]
+fn ignore_color_leaves_out_the_colour_picked() {
+    // Navy field, yellow disc, green bar.
+    let img = three_colour_art(0.0);
+    let params = TraceParams { colors: 3, ignore_white: true, ..sixteen_colors() };
+    // White by default: nothing here is white.
+    assert_eq!(trace(&img, &params).paths.len(), 3);
+    // The navy picked a little off: the field goes, the disc and the bar stay.
+    let res = trace(&img, &TraceParams { ignore_color: Some("#18263c".replace("3c", "5e")), ..params.clone() });
+    assert_eq!(res.paths.len(), 2);
+    assert!(res.paths.iter().all(|p| p.color != [20, 40, 90]));
+    // Not ticked, the colour is not left out; and a colour that is none is refused.
+    assert_eq!(trace(&img, &TraceParams { ignore_white: false, ignore_color: Some("#14285a".into()), ..params.clone() }).paths.len(), 3);
+    let bad = trace_within(&img, &TraceParams { ignore_color: Some("navy".into()), ..params.clone() }, usize::MAX);
+    assert!(matches!(bad, Err(TraceError::BadPalette(_))));
+    // Old documents have no such setting: white.
+    let old: TraceParams = serde_json::from_str(r#"{"mode":"color","ignoreWhite":true}"#).unwrap();
+    assert_eq!(old.ignore_color, None);
+    assert_eq!(serde_json::to_value(&params).unwrap()["ignoreColor"], serde_json::Value::Null);
+}
+
+#[test]
+fn snap_curves_to_lines_levels_a_rectangle_a_degree_askew() {
+    // 120 × 60, turned 1.5° about its centre.
+    let (c, t) = (Point::new(100.3, 60.6), 1.5f64.to_radians());
+    let img = soft(200, 120, |x, y| {
+        let (dx, dy) = (x - c.x, y - c.y);
+        (dx * t.cos() + dy * t.sin()).abs() <= 60.0 && (dy * t.cos() - dx * t.sin()).abs() <= 30.0
+    });
+    let sides = |snap: bool| {
+        let res = trace(&img, &TraceParams { snap_curves_to_lines: snap, ..bw() });
+        let sp = res.paths[0].path.subpaths[0].clone();
+        assert_eq!(sp.anchors.len(), 4, "{sp:?}");
+        (0..4).map(|i| sp.segment(i)).map(|s| ((s.p3.x - s.p0.x).abs(), (s.p3.y - s.p0.y).abs())).collect::<Vec<_>>()
+    };
+    // Snapped, every side is exactly level or upright; left alone, it keeps its 1.5°.
+    assert!(sides(true).iter().all(|(dx, dy)| *dx == 0.0 || *dy == 0.0), "{:?}", sides(true));
+    assert!(sides(false).iter().all(|(dx, dy)| dx.min(*dy) > 0.5), "{:?}", sides(false));
+    // And it is still the rectangle: 120 by 60 about the same centre.
+    let b = trace(&img, &TraceParams { snap_curves_to_lines: true, ..bw() }).paths[0].path.bounds().unwrap();
+    assert!((b.width() - 120.0).abs() < 1.0 && (b.height() - 60.0).abs() < 1.0 && (b.center().x - c.x).abs() < 0.3, "{b:?}");
+    // A side 5° off is no slip of the scanner: it stays.
+    let t = 5f64.to_radians();
+    let img = soft(200, 120, |x, y| {
+        let (dx, dy) = (x - c.x, y - c.y);
+        (dx * t.cos() + dy * t.sin()).abs() <= 60.0 && (dy * t.cos() - dx * t.sin()).abs() <= 30.0
+    });
+    let sp = trace(&img, &TraceParams { snap_curves_to_lines: true, ..bw() }).paths[0].path.subpaths[0].clone();
+    assert!(
+        (0..sp.segment_count())
+            .all(|i| (sp.segment(i).p3.y - sp.segment(i).p0.y).abs() > 1.0 && (sp.segment(i).p3.x - sp.segment(i).p0.x).abs() > 1.0)
+    );
+}

crates/trace/tests/quality/inputs.rs

@@ -15,13 +15,16 @@ pub enum Class {
     Poly,
     /// Thin lines, 0.5 to 5 units wide.
     Lines,
+    /// Straight-edged shapes and lines a degree or two off level and upright, as a scan or a
+    /// screenshot taken a little askew has them.
+    Askew,
     /// Flat art in several colours, with regions that touch.
     Flat,
     /// Continuous tone: a gradient and a photo-like image.
     Tone,
 }
 
-pub const CLASSES: [Class; 5] = [Class::Shape, Class::Poly, Class::Lines, Class::Flat, Class::Tone];
+pub const CLASSES: [Class; 6] = [Class::Shape, Class::Poly, Class::Lines, Class::Askew, Class::Flat, Class::Tone];
 
 impl Class {
     pub fn name(self) -> &'static str {
@@ -29,6 +32,7 @@ impl Class {
             Class::Shape => "curved shapes",
             Class::Poly => "polygons",
             Class::Lines => "thin lines",
+            Class::Askew => "askew shapes",
             Class::Flat => "flat colour art",
             Class::Tone => "gradient, photo",
         }
@@ -215,6 +219,27 @@ pub fn inputs() -> Vec<Input> {
         lines.extend(strip);
     }
 
+    // A rectangle 1.5° off level, a plus sign 1° off the other way, and two lines 1° and 2° off.
+    let turned = |p: BezPath, deg: f64, about: (f64, f64)| Affine::rotate_about(deg.to_radians(), Point::new(about.0, about.1)) * p;
+    let plus = [
+        (150.0, 150.0),
+        (170.0, 150.0),
+        (170.0, 180.0),
+        (200.0, 180.0),
+        (200.0, 200.0),
+        (170.0, 200.0),
+        (170.0, 230.0),
+        (150.0, 230.0),
+        (150.0, 200.0),
+        (120.0, 200.0),
+        (120.0, 180.0),
+        (150.0, 180.0),
+    ];
+    let mut askew = turned(poly(&[(40.3, 30.6), (200.7, 30.6), (200.7, 110.4), (40.3, 110.4)]), 1.5, (120.0, 70.0));
+    askew.extend(turned(poly(&plus), -1.0, (160.0, 190.0)));
+    askew.extend(turned(poly(&[(20.0, 150.3), (100.0, 150.3), (100.0, 153.3), (20.0, 153.3)]), 1.0, (60.0, 152.0)));
+    askew.extend(turned(poly(&[(60.4, 170.0), (62.4, 170.0), (62.4, 240.0), (60.4, 240.0)]), 2.0, (61.0, 205.0)));
+
     let centre = Point::new(128.4, 128.3);
     let touching = vec![(half_disc(centre, 90.0, true), [200, 40, 50]), (half_disc(centre, 90.0, false), [30, 90, 200])];
     let bar = [(60.3, 180.4), (196.6, 180.4), (196.6, 206.7), (60.3, 206.7)];
@@ -234,6 +259,7 @@ pub fn inputs() -> Vec<Input> {
         art("star", Class::Poly, ink(poly(&star)), 10, points(&star)),
         art("letter A", Class::Poly, ink(with_holes(poly(&a_outer), &[poly(&a_counter)])), 10, points(&[&a_outer[..], &a_counter].concat())),
         art("lines", Class::Lines, ink(lines), 20, vec![]),
+        art("askew shapes and lines", Class::Askew, ink(askew), 24, vec![]),
         art("two touching halves", Class::Flat, touching, 6, vec![(centre.x, centre.y - 90.0).into(), (centre.x, centre.y + 90.0).into()]),
         art("four-colour badge", Class::Flat, multicolor, 20, points(&bar)),
         tone("gradient", gradient),

crates/trace/tests/quality/main.rs

@@ -68,11 +68,11 @@ fn target(preset: &str, input: &Input) -> bool {
         "High Fidelity Photo" | "Low Fidelity Photo" | "Shades of Gray" => &[Class::Tone],
         // Three colours cannot show the badge's five.
         "3 Colors" => return input.name == "two touching halves",
-        "6 Colors" | "16 Colors" | "Flat Logo" => &[Class::Flat],
+        "6 Colors" | "16 Colors" | "Flat Logo" | "Auto Color" => &[Class::Flat],
         "Sketched Art" => &[Class::Shape, Class::Lines],
         "Silhouettes" => &[Class::Shape],
-        "Line Art" => &[Class::Lines],
-        "Technical Drawing" => &[Class::Lines, Class::Poly],
+        "Line Art" | "Outline" => &[Class::Lines],
+        "Technical Drawing" => &[Class::Lines, Class::Poly, Class::Askew],
         _ => &[Class::Shape, Class::Poly],
     };
     classes.contains(&input.class)
@@ -172,12 +172,12 @@ fn stat(runs: &[&Metrics], field: impl Fn(&Metrics) -> f64, max: bool, digits: u
     if x.is_finite() { format!("{:.digits$}", x + 0.0) } else { "all".into() }
 }
 
-const HEADER: &str = "| ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |\n|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|\n";
+const HEADER: &str = "| ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |\n|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|\n";
 
 fn row(runs: &[&Run]) -> String {
     let m: Vec<&Metrics> = runs.iter().filter_map(|r| r.metrics.as_ref()).collect();
     if m.is_empty() {
-        return format!("| refused |{}", " |".repeat(16));
+        return format!("| refused |{}", " |".repeat(17));
     }
     let cells = [
         stat(&m, |m| m.delta, false, 2),
@@ -189,6 +189,7 @@ fn row(runs: &[&Run]) -> String {
         stat(&m, |m| m.anchors, false, 0),
         stat(&m, |m| m.anchor_ratio, false, 2),
         stat(&m, |m| m.lines, false, 0),
+        stat(&m, |m| m.upright, false, 0),
         stat(&m, |m| m.corners, false, 0),
         stat(&m, |m| m.kinks, false, 1),
         stat(&m, |m| m.slivers, false, 1),
@@ -223,7 +224,7 @@ fn report() -> String {
     let presets = presets();
     let inputs = inputs();
     let drawn = draw_all(&inputs);
-    let one_colour = |d: &&Drawing| matches!(d.0.class, Class::Shape | Class::Poly | Class::Lines);
+    let one_colour = |d: &&Drawing| matches!(d.0.class, Class::Shape | Class::Poly | Class::Lines | Class::Askew);
     if let Ok(dir) = std::env::var("TRACE_QUALITY_IMAGES") {
         for (input, size, variant, img) in &drawn {
             std::fs::write(format!("{dir}/{}.png", stem(input, *size, *variant)), img.encode_png()).unwrap();
@@ -270,7 +271,7 @@ fn report() -> String {
             .collect();
         let _ = write!(md, "\n## 4. Yardstick\n\n{} traces by another tracer, measured the same way.\n\n| inputs | variant ", theirs.len());
         md += HEADER.replacen("\n|", "\n|:--|:--|", 1).as_str();
-        for class in [Class::Shape, Class::Poly, Class::Lines] {
+        for class in [Class::Shape, Class::Poly, Class::Lines, Class::Askew] {
             for variant in VARIANTS {
                 let rows: Vec<&Run> = theirs.iter().filter(|r| r.class == class && r.variant == variant).collect();
                 let _ = writeln!(md, "| {} | {} {}", class.name(), variant.name(), row(&rows));

crates/trace/tests/quality/measure.rs

@@ -175,6 +175,8 @@ pub struct Metrics {
     pub anchor_ratio: f64,
     /// Share (%) of the outline length made of straight segments.
     pub lines: f64,
+    /// Share (%) of the outline length that is exactly level or upright.
+    pub upright: f64,
     /// Share (%) of the art's sharp corners that have a traced corner within 1.5 px.
     pub corners: f64,
     /// Anchors where the path turns by 10° or more away from any true corner.
@@ -224,7 +226,7 @@ pub fn measure(input: &Input, variant: Variant, size: u32, src: &Raster, params:
             let kept = true_corners.iter().filter(|c| turns.iter().any(|(p, t)| *t >= 20.0 && p.distance(**c) <= 1.5)).count();
             corners = 100.0 * kept as f64 / true_corners.len() as f64;
         }
-        if input.class != Class::Lines {
+        if input.class != Class::Lines && input.class != Class::Askew {
             kinks = turns.iter().filter(|(p, t)| *t >= 10.0 && true_corners.iter().all(|c| p.distance(*c) > 2.0)).count() as f64;
         }
         if params.mode != Mode::BlackAndWhite {
@@ -234,7 +236,7 @@ pub fn measure(input: &Input, variant: Variant, size: u32, src: &Raster, params:
         }
     }
 
-    let (mut length, mut straight) = (0.0, 0.0);
+    let (mut length, mut straight, mut upright) = (0.0, 0.0, 0.0);
     for sp in art.iter().flat_map(|(tp, _)| &tp.path.subpaths) {
         for i in 0..sp.segment_count() {
             let len = sp.segment(i).arclen(0.05);
@@ -243,6 +245,9 @@ pub fn measure(input: &Input, variant: Variant, size: u32, src: &Raster, params:
             let c = sp.segment(i);
             if seg_dist(c.p1, c.p0, c.p3) < 0.02 && seg_dist(c.p2, c.p0, c.p3) < 0.02 {
                 straight += len;
+                if (c.p0.x - c.p3.x).abs() < 1e-9 || (c.p0.y - c.p3.y).abs() < 1e-9 {
+                    upright += len;
+                }
             }
         }
     }
@@ -275,6 +280,7 @@ pub fn measure(input: &Input, variant: Variant, size: u32, src: &Raster, params:
         anchors: anchors as f64,
         anchor_ratio: if input.anchors > 0 { anchors as f64 / input.anchors as f64 } else { nan },
         lines: if length > 0.0 { 100.0 * straight / length } else { nan },
+        upright: if length > 0.0 { 100.0 * upright / length } else { nan },
         corners,
         kinks,
         slivers,

crates/ui-egui/src/i18n/cs.tsv

@@ -621,6 +621,7 @@
 	VectorCraft on GitHub	VectorCraft na GitHubu
 	Search Commands…	Hledat příkazy…
 	VectorCraft Help…	Nápověda VectorCraft…
+	Auto Color	Automatická barva
 	Automatic	Automaticky
 	Isolate Selected Group	Izolovat vybranou skupinu
 	Exit Isolation Mode	Ukončit izolovaný režim
@@ -1424,6 +1425,7 @@ lighting	Light	Světlo
 	Abutting	Sousedící
 	Black and White	Černobílé
 	Corners	Rohy
+	Ignore Color	Ignorovat barvu
 	Ignore White	Ignorovat bílou
 	Palette:	Paleta:
 	Limited	Omezená
@@ -3660,6 +3662,7 @@ effect	Regular	Pravidelný
 	Stroke Pressure	Tlak tahu
 
 # Plurals: one|few|other
+imageTrace	Outline	Obrys
 @plural	{n} item|{n} items	{n} položka|{n} položky|{n} položek
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Tabulka barev ({n} barva)|Tabulka barev ({n} barvy)|Tabulka barev ({n} barev)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Odstranit {n} grafický styl?|Odstranit {n} grafické styly?|Odstranit {n} grafických stylů?

crates/ui-egui/src/i18n/de.tsv

@@ -229,6 +229,7 @@
 	Author Title:	Titel des Autors:
 	Author:	Autor:
 	Auto	Auto
+	Auto Color	Automatische Farbe
 	Automatic	Automatisch
 	Auto Size New Area Type	Größe von neuem Flächentext automatisch anpassen
 	Auto Spell Check	Automatische Rechtschreibprüfung
@@ -1226,6 +1227,7 @@
 	Identify Objects By	Objekte identifizieren nach
 	Ignore	Ignorieren
 	Ignore Artboards (all the art as one page)	Zeichenflächen ignorieren (gesamte Grafik als eine Seite)
+	Ignore Color	Farbe ignorieren
 	Ignore White	Weiß ignorieren
 	Palette:	Palette:
 	Limited	Begrenzt
@@ -3135,6 +3137,7 @@ effect	Points	Punkte
 	{warning}: click to correct to the closest color ({hex})	{warning}: Klicken korrigiert auf die nächstliegende Farbe ({hex})
 	“{file}” is protected by a password.	„{file}“ ist durch ein Kennwort geschützt.
 	● Recording	● Aufzeichnung
+imageTrace	Outline	Kontur
 @plural	{n} item|{n} items	{n} Element|{n} Elemente
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Farbtabelle ({n} Farbe)|Farbtabelle ({n} Farben)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Diesen {n} Grafikstil löschen?|Diese {n} Grafikstile löschen?

crates/ui-egui/src/i18n/es.tsv

@@ -247,6 +247,7 @@
 	Author Title:	Cargo del autor:
 	Author:	Autor:
 	Auto	Auto
+	Auto Color	Color automático
 	Automatic	Automático
 	Auto Size New Area Type	Ajustar automáticamente el tamaño del nuevo texto de área
 	Auto Spell Check	Revisión ortográfica automática
@@ -1244,6 +1245,7 @@
 	Identify Objects By	Identificar objetos por
 	Ignore	Ignorar
 	Ignore Artboards (all the art as one page)	Ignorar mesas de trabajo (toda la ilustración como una página)
+	Ignore Color	Ignorar color
 	Ignore White	Ignorar blanco
 	Palette:	Paleta:
 	Limited	Limitada
@@ -3236,6 +3238,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}: clic para corregir al color más cercano ({hex})
 	“{file}” is protected by a password.	“{file}” está protegido con contraseña.
 	● Recording	● Grabando
+imageTrace	Outline	Contorno
 @plural	{n} item|{n} items	{n} elemento|{n} elementos
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Tabla de colores ({n} color)|Tabla de colores ({n} colores)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	¿Eliminar {n} estilo gráfico?|¿Eliminar estos {n} estilos gráficos?

crates/ui-egui/src/i18n/fr.tsv

@@ -248,6 +248,7 @@
 	Author Title:	Fonction de l’auteur :
 	Author:	Auteur :
 	Auto	Auto
+	Auto Color	Couleur automatique
 	Automatic	Automatique
 	Auto Size New Area Type	Taille automatique du nouveau texte captif
 	Auto Spell Check	Vérification orthographique automatique
@@ -1243,6 +1244,7 @@
 	Identify Objects By	Identifier les objets par
 	Ignore	Ignorer
 	Ignore Artboards (all the art as one page)	Ignorer les plans de travail (toute l’illustration sur une page)
+	Ignore Color	Ignorer la couleur
 	Ignore White	Ignorer le blanc
 	Palette:	Palette :
 	Limited	Limitée
@@ -3233,6 +3235,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning} : cliquez pour corriger avec la couleur la plus proche ({hex})
 	“{file}” is protected by a password.	« {file} » est protégé par un mot de passe.
 	● Recording	● Enregistrement
+imageTrace	Outline	Contour
 @plural	{n} item|{n} items	{n} élément|{n} éléments
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Table des couleurs ({n} couleur)|Table des couleurs ({n} couleurs)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Supprimer {n} style graphique ?|Supprimer ces {n} styles graphiques ?

crates/ui-egui/src/i18n/hu.tsv

@@ -360,6 +360,7 @@
 	Auto Spell Check	Automatikus helyesírás-ellenőrzés
 	Auto-Collapse Iconic Panels	Ikonpanelek automatikus becsukása
 	Auto-Rotate (turn the paper to each artboard)	Automatikus elforgatás (a papír igazodik minden rajztáblához)
+	Auto Color	Automatikus szín
 	Automatic	Automatikus
 	Automatic flatness	Automatikus simaság
 	Automatically	Automatikusan
@@ -1608,6 +1609,7 @@
 	Identify Objects By	Objektumok azonosítása
 	Ignore	Kihagy
 	Ignore Artboards (all the art as one page)	Rajztáblák figyelmen kívül hagyása (az összes grafika egy oldalon)
+	Ignore Color	Szín figyelmen kívül hagyása
 	Ignore White	Fehér figyelmen kívül hagyása
 	Image	Kép
 	Image Info	Kép adatai
@@ -3935,6 +3937,7 @@ lighting	Light	Fény
 theme	Appearance	Kinézet
 
 # Plurals: one|other
+imageTrace	Outline	Körvonal
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Színtábla ({n} szín)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	{n} grafikai stílus törlése?
 @plural	{n} area highlighted|{n} areas highlighted	Kiemelt terület: {n}

crates/ui-egui/src/i18n/it.tsv

@@ -247,6 +247,7 @@
 	Author Title:	Qualifica dell'autore:
 	Author:	Autore:
 	Auto	Auto
+	Auto Color	Colore automatico
 	Automatic	Automatico
 	Auto Size New Area Type	Dimensionamento automatico del nuovo testo in area
 	Auto Spell Check	Controllo ortografico automatico
@@ -1243,6 +1244,7 @@
 	Identify Objects By	Identifica oggetti per
 	Ignore	Ignora
 	Ignore Artboards (all the art as one page)	Ignora tavole da disegno (tutta la grafica come una sola pagina)
+	Ignore Color	Ignora colore
 	Ignore White	Ignora bianco
 	Palette:	Palette:
 	Limited	Limitata
@@ -3236,6 +3238,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}: fai clic per correggere con il colore più vicino ({hex})
 	“{file}” is protected by a password.	“{file}” è protetto da password.
 	● Recording	● Registrazione in corso
+imageTrace	Outline	Contorno
 @plural	{n} item|{n} items	{n} elemento|{n} elementi
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Tabella colori ({n} colore)|Tabella colori ({n} colori)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Eliminare {n} stile grafico?|Eliminare questi {n} stili grafici?

crates/ui-egui/src/i18n/ja.tsv

@@ -666,6 +666,7 @@
 	Hide Print Tiling	プリント分割を隠す
 	Unlock Grid	グリッドをロック解除
 	Edit Envelope	エンベロープを編集
+	Auto Color	自動カラー
 	Automatic	自動
 	Isolate Selected Group	選択したグループを分離
 	Exit Isolation Mode	分離モードを終了
@@ -1481,6 +1482,7 @@
 	Identify Objects By	オブジェクトの識別方法
 	Ignore	無視
 	Ignore Artboards (all the art as one page)	アートボードを無視 (すべてのアートを 1 ページとして扱う)
+	Ignore Color	カラーを無視
 	Ignore White	白を無視
 	Palette:	パレット:
 	Limited	限定
@@ -3225,6 +3227,7 @@
 	Yellow	イエロー
 	[Normal Character Style]	[標準文字スタイル]
 	[Normal Paragraph Style]	[標準段落スタイル]
+imageTrace	Outline	アウトライン
 @plural	Color Table ({n} color)|Color Table ({n} colors)	カラーテーブル ({n} 色)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	{n} 個のグラフィックスタイルを削除しますか？
 @plural	{n} Layer|{n} Layers	{n} レイヤー

crates/ui-egui/src/i18n/ko.tsv

@@ -664,6 +664,7 @@
 	Hide Print Tiling	인쇄 타일링 숨기기
 	Unlock Grid	격자 잠금 해제
 	Edit Envelope	엔벨로프 편집
+	Auto Color	자동 색상
 	Automatic	자동
 	Isolate Selected Group	선택한 그룹 격리
 	Exit Isolation Mode	격리 모드 종료
@@ -1476,6 +1477,7 @@
 	Identify Objects By	개체 식별 기준
 	Ignore	무시
 	Ignore Artboards (all the art as one page)	아트보드 무시 (모든 아트웍을 한 페이지로)
+	Ignore Color	색상 무시
 	Ignore White	흰색 무시
 	Palette:	팔레트:
 	Limited	제한
@@ -3218,6 +3220,7 @@
 	Yellow	노랑
 	[Normal Character Style]	[기본 문자 스타일]
 	[Normal Paragraph Style]	[기본 단락 스타일]
+imageTrace	Outline	윤곽선
 @plural	Color Table ({n} color)|Color Table ({n} colors)	색상 표 ({n}색)|색상 표 ({n}색)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	그래픽 스타일 {n}개를 삭제하시겠습니까?|그래픽 스타일 {n}개를 삭제하시겠습니까?
 @plural	{n} Layer|{n} Layers	레이어 {n}개|레이어 {n}개

crates/ui-egui/src/i18n/pl.tsv

@@ -606,6 +606,7 @@
 	VectorCraft on GitHub	VectorCraft w serwisie GitHub
 	Search Commands…	Szukaj poleceń…
 	VectorCraft Help…	Pomoc VectorCraft…
+	Auto Color	Kolor automatyczny
 	Automatic	Automatycznie
 	Isolate Selected Group	Izoluj zaznaczoną grupę
 	Exit Isolation Mode	Wyjdź z trybu izolacji
@@ -1374,6 +1375,7 @@ lighting	Light	Światło
 	Abutting	Stykające się
 	Black and White	Czarno-biały
 	Corners	Narożniki
+	Ignore Color	Ignoruj kolor
 	Ignore White	Ignoruj biel
 	Palette:	Paleta:
 	Limited	Ograniczona
@@ -3528,6 +3530,7 @@ effect	Regular	Normalny
 	Stroke Direction	Kierunek pociągnięć
 	Stroke Width	Szerokość pociągnięć
 	Stroke Pressure	Nacisk pociągnięć
+imageTrace	Outline	Kontur
 @plural	{n} item|{n} items	{n} element|{n} elementy|{n} elementów
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Tablica kolorów ({n} kolor)|Tablica kolorów ({n} kolory)|Tablica kolorów ({n} kolorów)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Usunąć {n} styl graficzny?|Usunąć {n} style graficzne?|Usunąć {n} stylów graficznych?

crates/ui-egui/src/i18n/pt-br.tsv

@@ -1070,7 +1070,7 @@
 	Identify Objects By	Identificar Objetos Por
 	Ignore	Ignorar
 	Ignore Artboards (all the art as one page)	Ignorar Mesas de Trabalho (toda a arte como uma página)
-	Ignore White	Ignorar Branco
+	Ignore Color	Ignorar Cor
 	Image Info	Informações da Imagem
 	Image Map:	Mapa da Imagem:
 	Image Size	Tamanho da Imagem
@@ -2661,6 +2661,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}: clique para corrigir para a cor mais próxima ({hex})
 	“{file}” is protected by a password.	“{file}” é protegido por uma senha.
 	● Recording	● Gravando
+imageTrace	Outline	Contorno
 @plural	{n} item|{n} items	{n} item|{n} itens
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Tabela de Cores ({n} cor)|Tabela de Cores ({n} cores)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Excluir este {n} estilo gráfico?|Excluir estes {n} estilos gráficos?

crates/ui-egui/src/i18n/ru.tsv

@@ -245,6 +245,7 @@
 	Author Title:	Должность автора:
 	Author:	Автор:
 	Auto	Авто
+	Auto Color	Автоцвет
 	Automatic	Автоматически
 	Auto Size New Area Type	Автоматически подгонять размер нового текста в области
 	Auto Spell Check	Автоматическая проверка орфографии
@@ -1241,6 +1242,7 @@
 	Identify Objects By	Определять объекты по
 	Ignore	Игнорировать
 	Ignore Artboards (all the art as one page)	Игнорировать монтажные области (весь рисунок как одна страница)
+	Ignore Color	Игнорировать цвет
 	Ignore White	Игнорировать белый
 	Palette:	Палитра:
 	Limited	Ограниченная
@@ -3232,6 +3234,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}: щёлкните для исправления на ближайший цвет ({hex})
 	“{file}” is protected by a password.	«{file}» защищён паролем.
 	● Recording	● Запись
+imageTrace	Outline	Контур
 @plural	{n} item|{n} items	{n} элемент|{n} элемента|{n} элементов
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Цветовая таблица ({n} цвет)|Цветовая таблица ({n} цвета)|Цветовая таблица ({n} цветов)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Удалить этот графический стиль ({n})?|Удалить эти графические стили ({n})?|Удалить эти графические стили ({n})?

crates/ui-egui/src/i18n/uk.tsv

@@ -241,6 +241,7 @@
 	Author Title:	Посада автора:
 	Author:	Автор:
 	Auto	Авто
+	Auto Color	Автоколір
 	Automatic	Автоматично
 	Auto Size New Area Type	Автоматично підганяти розмір нового тексту в області
 	Auto Spell Check	Автоматична перевірка орфографії
@@ -1237,6 +1238,7 @@
 	Identify Objects By	Визначати об’єкти по
 	Ignore	Ігнорувати
 	Ignore Artboards (all the art as one page)	Ігнорувати монтажні області (весь малюнок як одна сторінка)
+	Ignore Color	Ігнорувати колір
 	Ignore White	Ігнорувати білий
 	Palette:	Палітра:
 	Limited	Обмежена
@@ -3229,6 +3231,7 @@ effect	Points	Точки
 	{warning}: click to correct to the closest color ({hex})	{warning}: натисніть , щоб виправити найближчий колір ({hex})
 	“{file}” is protected by a password.	"{file}" захищений паролем.
 	● Recording	● Запис
+imageTrace	Outline	Контур
 @plural	{n} item|{n} items	{n} елемент|{n} елементи|{n} елементів
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Таблиця кольорів ({n} колір)|Таблиця кольорів ({n} кольори)|Таблиця кольорів ({n} кольорів)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Видалити цей графічний стиль ({n})?|Видалити ці графічні стилі ({n})?|Видалити ці графічні стилі ({n})?

crates/ui-egui/src/i18n/vi.tsv

@@ -288,6 +288,7 @@
 	Auto Spell Check	Kiểm tra chính tả tự động
 	Auto-Collapse Iconic Panels	Tự động thu gọn bảng dạng biểu tượng
 	Auto-Rotate (turn the paper to each artboard)	Tự động xoay (xoay trang cho mỗi bảng vẽ)
+	Auto Color	Màu tự động
 	Automatic	Tự động
 	Automatic flatness	Độ phẳng tự động
 	Automatically	Tự động
@@ -1437,6 +1438,7 @@
 	Identify Objects By	Nhận diện đối tượng theo
 	Ignore	Bỏ qua
 	Ignore Artboards (all the art as one page)	Bỏ qua bảng vẽ (toàn bộ bản vẽ thành một trang)
+	Ignore Color	Bỏ qua màu
 	Ignore White	Bỏ qua màu trắng
 	Image	Hình ảnh
 	Image Info	Thông tin hình ảnh
@@ -3556,6 +3558,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}: bấm để chỉnh sang màu gần nhất ({hex})
 	“{file}” is protected by a password.	“{file}” được bảo vệ bằng mật khẩu.
 	● Recording	● Đang ghi
+imageTrace	Outline	Đường viền
 @plural	Color Table ({n} color)|Color Table ({n} colors)	Bảng màu ({n} màu)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	Xóa {n} kiểu đồ họa này?
 @plural	{n} area highlighted|{n} areas highlighted	{n} vùng được tô sáng

crates/ui-egui/src/i18n/zh-hans.tsv

@@ -205,6 +205,7 @@
 	Author Title:	作者职务：
 	Author:	作者：
 	Auto	自动
+	Auto Color	自动颜色
 	Automatic	自动
 	Auto Size New Area Type	自动调整新区域文字大小
 	Auto Spell Check	自动拼写检查
@@ -1189,6 +1190,7 @@
 	Identify Objects By	对象识别方式
 	Ignore	忽略
 	Ignore Artboards (all the art as one page)	忽略画板 (所有图稿作为一页)
+	Ignore Color	忽略颜色
 	Ignore White	忽略白色
 	Palette:	调板：
 	Limited	有限
@@ -3129,6 +3131,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}：单击以修正为最接近的颜色 ({hex})
 	“{file}” is protected by a password.	“{file}”受密码保护。
 	● Recording	● 录制中
+imageTrace	Outline	轮廓
 @plural	{n} item|{n} items	{n} 个项目
 @plural	Color Table ({n} color)|Color Table ({n} colors)	颜色表 ({n} 色)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	要删除这 {n} 个图形样式吗？

crates/ui-egui/src/i18n/zh-hant.tsv

@@ -216,6 +216,7 @@
 	Author Title:	作者職稱：
 	Author:	作者：
 	Auto	自動
+	Auto Color	自動顏色
 	Automatic	自動
 	Auto Size New Area Type	自動調整新區域文字大小
 	Auto Spell Check	自動拼字檢查
@@ -1219,6 +1220,7 @@
 	Identify Objects By	識別物件依據
 	Ignore	略過
 	Ignore Artboards (all the art as one page)	忽略工作區域 (所有圖稿視為單一頁面)
+	Ignore Color	忽略顏色
 	Ignore White	忽略白色
 	Palette:	調色盤：
 	Limited	有限
@@ -3222,6 +3224,7 @@
 	{warning}: click to correct to the closest color ({hex})	{warning}：按一下以修正為最接近的顏色 ({hex})
 	“{file}” is protected by a password.	「{file}」受密碼保護。
 	● Recording	● 錄製中
+imageTrace	Outline	輪廓
 @plural	{n} item|{n} items	{n} 個項目
 @plural	Color Table ({n} color)|Color Table ({n} colors)	色彩表 ({n} 色)
 @plural	Delete this {n} graphic style?|Delete these {n} graphic styles?	要刪除這 {n} 個繪圖樣式嗎？

crates/ui-egui/src/panels/image_trace.rs

@@ -19,6 +19,16 @@ const MODES: [(&str, &str); 4] = [("blackAndWhite", "Black and White"), ("graysc
 const PALETTES: [&str; 4] = ["limited", "fullTone", "automatic", "documentLibrary"];
 
 /// Palette `id`, in the UI language.
+/// The colour Ignore Color leaves out in `params` (`ignoreColor`, `#rrggbb`): white when there is none.
+fn ignore_color(params: &Value) -> [u8; 3] {
+    let hex = params["ignoreColor"].as_str().unwrap_or("").trim_start_matches('#');
+    let channel = |i: usize| hex.get(i * 2..i * 2 + 2).and_then(|h| u8::from_str_radix(h, 16).ok());
+    match (hex.len(), channel(0), channel(1), channel(2)) {
+        (6, Some(r), Some(g), Some(b)) => [r, g, b],
+        _ => [255; 3],
+    }
+}
+
 fn palette_label(id: &str) -> &'static str {
     match id {
         "fullTone" => tl!("Full Tone"),
@@ -128,10 +138,16 @@ fn trace_with(app: &mut VectorcraftApp, preset: &str) {
 
 /// The built-in presets to choose from (`current` highlighted) → the one chosen. Listed only
 /// while the menu is open.
+/// A preset's name as shown: translated as a preset's name where the catalog has it so (the
+/// Outline preset is not the Outline view), as any other string else.
+fn preset_label(name: &str) -> &str {
+    crate::i18n::tr_ctx(crate::i18n::current(), "imageTrace", name)
+}
+
 fn preset_list(app: &mut VectorcraftApp, ui: &mut Ui, current: &str) -> Option<String> {
     let mut chosen = None;
     for (name, _) in presets(app) {
-        if ui.add(egui::Button::selectable(name == current, tl!(&name))).clicked() {
+        if ui.add(egui::Button::selectable(name == current, preset_label(&name))).clicked() {
             chosen = Some(name);
         }
     }
@@ -338,14 +354,29 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
             }
             retrace |= release;
         }
-        for (key, label) in [("snapCurvesToLines", tl!("Snap Curves To Lines")), ("ignoreWhite", tl!("Ignore White"))] {
-            let on = st.params[key].as_bool().unwrap_or(false);
-            if widgets::check(ui, label, on, true) {
-                st.params[key] = json!(!on);
+        let snap = st.params["snapCurvesToLines"].as_bool().unwrap_or(false);
+        if widgets::check(ui, tl!("Snap Curves To Lines"), snap, true) {
+            st.params["snapCurvesToLines"] = json!(!snap);
+            st.preset = "Custom".into();
+            retrace = true;
+        }
+        // Ignore Color: white, unless another colour is picked.
+        ui.horizontal(|ui| {
+            let on = st.params["ignoreWhite"].as_bool().unwrap_or(false);
+            if widgets::check(ui, tl!("Ignore Color"), on, true) {
+                st.params["ignoreWhite"] = json!(!on);
                 st.preset = "Custom".into();
                 retrace = true;
             }
-        }
+            if on {
+                let mut rgb = ignore_color(&st.params);
+                if ui.color_edit_button_srgb(&mut rgb).changed() {
+                    st.params["ignoreColor"] = json!(format!("#{:02x}{:02x}{:02x}", rgb[0], rgb[1], rgb[2]));
+                    st.preset = "Custom".into();
+                    retrace = true;
+                }
+            }
+        });
     }
     widgets::divider(ui);
     if let Some((p, a, c)) = st.info {

docs/image-trace-quality.md

@@ -1,6 +1,6 @@
 # Image Trace quality
 
-> **Last reviewed:** 2026-10-13 · **Last updated:** 2026-10-13 · **Change:** minor (thin lines in blurred and scanned art: Line Art 78 anchors to 46, 0.093 px off to 0.055)
+> **Last reviewed:** 2026-10-13 · **Last updated:** 2026-10-13 · **Change:** minor (Snap Curves To Lines levels lines a degree or two askew: 0 to 91-95 percent of their length exactly level or upright)
 
 What Image Trace (`crates/trace`) makes of images whose right answer is known, measured by a harness and
 compared with the numbers before each change. Nothing here is a judgement by eye, and nothing is compared
@@ -24,6 +24,7 @@ anti-aliasing):
 | curved shapes | a circle; two ellipses; a rounded badge with a round hole; a letter D with its counter |
 | polygons | a triangle, a turned square and a hexagon; a five-pointed star; a letter A with its counter |
 | thin lines | five lines 0.5, 1, 2, 3 and 5 units wide (of a 256-unit square), a few degrees off the pixel grid |
+| askew shapes | a rectangle, a plus sign and two lines, each 1 to 2 degrees off level and upright |
 | flat colour art | a disc of two halves in different colours that touch; a badge of four colours on white |
 | gradient, photo | a smooth two-way gradient with a glow; a photo-like image (soft-edged shaded objects, texture, sensor noise) |
 
@@ -40,6 +41,7 @@ The letters are drawn by hand from lines and curves: the repository has no font
 | paths, anchors | counts, the background's frame aside |
 | × art | anchors per anchor point of the art itself (1.00 is as economical as the original) |
 | lines % | share of the outline length made of straight segments (100 is right for polygons, 0 for a circle) |
+| upright % | share of the outline length that is exactly level or upright |
 | corners % | share of the art's sharp corners with a traced corner within 1.5 px |
 | kinks | anchors where the outline turns by 10° or more away from any true corner |
 | odd colours, odd px | paths (and their area) in a colour the art doesn't have: slivers along anti-aliased edges |
@@ -56,201 +58,240 @@ Each preset on the inputs it is meant for, all sizes and variants.
 
 ### Baseline (before any change, main at `baf9693f`)
 
-| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
-|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
-| Default | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.79 | 17.15 | 0.313 | 1.51 | 2.52 | 1.9 | 14 | 1.45 | 34 | 76 | 1.4 | – | – | 63.5 | 67.0 | 0.0 | 0.0 |
-| High Fidelity Photo | gradient, photo-like | 2.30 | 2.63 | – | – | – | 3652.6 | 46866 | – | 84 | – | – | – | – | 0.0 | – | 1169.4 | 0.3 |
-| Low Fidelity Photo | gradient, photo-like | 2.61 | 2.94 | – | – | – | 128.3 | 3867 | – | 42 | – | – | – | – | 0.0 | – | 0.0 | 0.7 |
-| 3 Colors | two touching halves | 4.93 | 11.38 | 0.482 | 2.35 | 89.09 | 2.1 | 14 | 2.31 | 12 | 29 | 2.1 | 1.6 | 15418 | 118.0 | 87.3 | 0.0 | 0.0 |
-| 6 Colors | two touching halves, four-colour badge | 0.78 | 8.82 | 4.383 | 83.10 | 30.11 | 21.2 | 270 | 30.18 | 51 | 98 | 213.8 | 2.4 | 272 | 198.8 | 194.6 | 0.0 | 0.3 |
-| 16 Colors | two touching halves, four-colour badge | 0.74 | 9.02 | 5.115 | 86.21 | 4.32 | 69.9 | 923 | 102.80 | 58 | 100 | 765.9 | 5.9 | 670 | 293.7 | 329.9 | 0.0 | 0.5 |
-| Shades of Gray | gradient, photo-like | 9.29 | 9.16 | – | – | – | 90.8 | 1921 | – | 42 | – | – | – | – | 0.0 | – | 0.2 | 0.5 |
-| Black and White Logo | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.76 | 15.96 | 0.270 | 1.76 | 2.53 | 1.4 | 31 | 3.78 | 90 | 81 | 15.3 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.85 | 17.04 | 0.302 | 1.63 | 105.63 | 1.8 | 14 | 1.34 | 28 | 18 | 1.4 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | circle, ellipses, badge with a hole, letter D | 3.04 | 21.41 | 0.573 | 2.88 | 2.89 | 1.2 | 10 | 1.16 | 9 | 86 | 1.4 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | lines | 2.77 | 12.51 | 0.158 | 1.13 | 105.76 | 5.4 | 25 | 1.27 | 90 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | polygons, star, letter A, lines | 2.66 | 13.45 | 0.201 | 1.37 | 105.76 | 4.8 | 32 | 2.23 | 100 | 85 | 5.9 | – | – | – | – | 0.1 | 0.0 |
-| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 |
+| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
+|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
+| Default | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.79 | 17.15 | 0.313 | 1.51 | 2.52 | 1.9 | 14 | 1.45 | 34 | 5 | 76 | 1.4 | – | – | 63.5 | 67.0 | 0.0 | 0.0 |
+| High Fidelity Photo | gradient, photo-like | 2.30 | 2.63 | – | – | – | 3652.6 | 46866 | – | 84 | 29 | – | – | – | – | 0.0 | – | 1169.4 | 0.3 |
+| Low Fidelity Photo | gradient, photo-like | 2.61 | 2.94 | – | – | – | 128.3 | 3867 | – | 42 | 22 | – | – | – | – | 0.0 | – | 0.0 | 0.7 |
+| 3 Colors | two touching halves | 4.93 | 11.38 | 0.482 | 2.35 | 89.09 | 2.1 | 14 | 2.31 | 12 | 8 | 29 | 2.1 | 1.6 | 15418 | 118.0 | 87.3 | 0.0 | 0.0 |
+| 6 Colors | two touching halves, four-colour badge | 0.78 | 8.82 | 4.383 | 83.10 | 30.11 | 21.2 | 270 | 30.18 | 51 | 40 | 98 | 213.8 | 2.4 | 272 | 198.8 | 194.6 | 0.0 | 0.3 |
+| 16 Colors | two touching halves, four-colour badge | 0.74 | 9.02 | 5.115 | 86.21 | 4.32 | 69.9 | 923 | 102.80 | 58 | 47 | 100 | 765.9 | 5.9 | 670 | 293.7 | 329.9 | 0.0 | 0.5 |
+| Shades of Gray | gradient, photo-like | 9.29 | 9.16 | – | – | – | 90.8 | 1921 | – | 42 | 27 | – | – | – | – | 0.0 | – | 0.2 | 0.5 |
+| Black and White Logo | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.76 | 15.96 | 0.270 | 1.76 | 2.53 | 1.4 | 31 | 3.78 | 90 | 17 | 81 | 15.3 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.85 | 17.04 | 0.302 | 1.63 | 105.63 | 1.8 | 14 | 1.34 | 28 | 8 | 18 | 1.4 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | circle, ellipses, badge with a hole, letter D | 3.04 | 21.41 | 0.573 | 2.88 | 2.89 | 1.2 | 10 | 1.16 | 9 | 7 | 86 | 1.4 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | lines | 2.77 | 12.51 | 0.158 | 1.13 | 105.76 | 5.4 | 25 | 1.27 | 90 | 6 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.73 | 13.67 | 0.210 | 1.43 | 105.76 | 4.7 | 31 | 2.01 | 100 | 9 | 85 | 5.9 | – | – | – | – | 0.1 | 0.0 |
+| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 10 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 |
 
-### Now (sub-pixel edges, the palette, photo smoothing, shared edges, memory, thin lines)
+### Now (all changes up to snapping near-level lines)
 
-| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
-|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
-| Default | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.60 | 10.02 | 0.090 | 1.02 | 2.22 | 1.9 | 17 | 1.74 | 29 | 69 | 0.4 | – | – | 0.5 | 0.6 | 0.0 | 0.0 |
-| High Fidelity Photo | gradient, photo-like | 1.75 | 1.97 | – | – | – | 120.7 | 10001 | – | 38 | – | – | – | – | 0.0 | – | 10.3 | 0.0 |
-| Low Fidelity Photo | gradient, photo-like | 2.45 | 2.69 | – | – | – | 37.1 | 2118 | – | 41 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| 3 Colors | two touching halves | 0.42 | 3.98 | 0.104 | 0.91 | 0.91 | 2.0 | 11 | 1.81 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | two touching halves, four-colour badge | 0.55 | 4.98 | 0.140 | 1.34 | 1.19 | 4.0 | 50 | 3.13 | 38 | 86 | 5.2 | 0.0 | 0 | 0.2 | 0.3 | 0.0 | 0.0 |
-| 16 Colors | two touching halves, four-colour badge | 0.55 | 4.90 | 0.141 | 1.31 | 1.19 | 4.2 | 62 | 3.79 | 39 | 86 | 6.4 | 0.0 | 0 | 0.2 | 0.2 | 0.0 | 0.0 |
-| Shades of Gray | gradient, photo-like | 9.26 | 9.06 | – | – | – | 16.5 | 695 | – | 51 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| Black and White Logo | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.58 | 9.33 | 0.059 | 1.02 | 2.22 | 1.4 | 29 | 2.88 | 39 | 69 | 0.3 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.71 | 11.98 | 0.186 | 1.00 | 105.61 | 1.8 | 17 | 1.47 | 16 | 86 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | circle, ellipses, badge with a hole, letter D | 2.98 | 19.28 | 0.524 | 2.19 | 2.18 | 1.2 | 14 | 1.65 | 11 | 79 | 0.3 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | lines | 2.62 | 9.44 | 0.055 | 0.96 | 105.82 | 5.4 | 46 | 2.29 | 41 | – | – | – | – | – | – | 0.1 | 0.0 |
-| Technical Drawing | polygons, star, letter A, lines | 2.54 | 9.65 | 0.084 | 1.02 | 105.82 | 4.8 | 46 | 3.23 | 71 | 73 | 0.8 | – | – | – | – | 1.2 | 0.0 |
-| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 |
+| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
+|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
+| Default | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.60 | 10.02 | 0.090 | 1.02 | 2.22 | 1.9 | 17 | 1.74 | 29 | 5 | 69 | 0.4 | – | – | 0.5 | 0.6 | 0.0 | 0.0 |
+| Auto Color | two touching halves, four-colour badge | 0.55 | 4.98 | 0.140 | 1.33 | 1.21 | 4.0 | 53 | 3.28 | 38 | 14 | 86 | 5.1 | 0.0 | 0 | 1.4 | 1.1 | 0.0 | 0.0 |
+| High Fidelity Photo | gradient, photo-like | 1.75 | 1.97 | – | – | – | 120.7 | 10001 | – | 38 | 36 | – | – | – | – | 0.0 | – | 10.3 | 0.0 |
+| Low Fidelity Photo | gradient, photo-like | 2.45 | 2.69 | – | – | – | 37.1 | 2118 | – | 41 | 36 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| 3 Colors | two touching halves | 0.42 | 3.98 | 0.104 | 0.91 | 0.91 | 2.0 | 11 | 1.81 | 39 | 6 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | two touching halves, four-colour badge | 0.55 | 4.98 | 0.140 | 1.34 | 1.19 | 4.0 | 50 | 3.13 | 38 | 14 | 86 | 5.2 | 0.0 | 0 | 0.2 | 0.3 | 0.0 | 0.0 |
+| 16 Colors | two touching halves, four-colour badge | 0.55 | 4.90 | 0.141 | 1.31 | 1.19 | 4.2 | 62 | 3.79 | 39 | 14 | 86 | 6.4 | 0.0 | 0 | 0.2 | 0.2 | 0.0 | 0.0 |
+| Shades of Gray | gradient, photo-like | 9.26 | 9.06 | – | – | – | 16.5 | 695 | – | 51 | 40 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| Black and White Logo | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.58 | 9.31 | 0.059 | 1.02 | 2.22 | 1.4 | 29 | 2.88 | 39 | 11 | 69 | 0.3 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.71 | 11.98 | 0.186 | 1.00 | 105.61 | 1.8 | 17 | 1.47 | 16 | 7 | 86 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | circle, ellipses, badge with a hole, letter D | 2.98 | 19.28 | 0.524 | 2.19 | 2.18 | 1.2 | 14 | 1.65 | 11 | 7 | 79 | 0.3 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | lines | 2.62 | 9.44 | 0.055 | 0.96 | 105.82 | 5.4 | 46 | 2.29 | 41 | 0 | – | – | – | – | – | – | 0.1 | 0.0 |
+| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.70 | 11.81 | 0.156 | 4.23 | 105.82 | 4.7 | 47 | 3.03 | 71 | 20 | 73 | 0.8 | – | – | – | – | 0.9 | 0.0 |
+| Outline | lines | 2.93 | 15.91 | 0.310 | 1.84 | 106.00 | 5.0 | 81 | 4.03 | 15 | 5 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 10 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 |
 
-The sections below are the numbers now (sub-pixel edges, the palette, photo smoothing, shared edges, memory, thin lines).
+The sections below are the numbers now (all changes up to snapping near-level lines).
 
 ## 1. Each preset on the inputs it is meant for
 
 All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs.
 
-| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
-|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
-| Default | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.60 | 10.02 | 0.090 | 1.02 | 2.22 | 1.9 | 17 | 1.74 | 29 | 69 | 0.4 | – | – | 0.5 | 0.6 | 0.0 | 0.0 |
-| High Fidelity Photo | gradient, photo-like | 1.75 | 1.97 | – | – | – | 120.7 | 10001 | – | 38 | – | – | – | – | 0.0 | – | 10.3 | 0.0 |
-| Low Fidelity Photo | gradient, photo-like | 2.45 | 2.69 | – | – | – | 37.1 | 2118 | – | 41 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| 3 Colors | two touching halves | 0.42 | 3.98 | 0.104 | 0.91 | 0.91 | 2.0 | 11 | 1.81 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | two touching halves, four-colour badge | 0.55 | 4.98 | 0.140 | 1.34 | 1.19 | 4.0 | 50 | 3.13 | 38 | 86 | 5.2 | 0.0 | 0 | 0.2 | 0.3 | 0.0 | 0.0 |
-| 16 Colors | two touching halves, four-colour badge | 0.55 | 4.90 | 0.141 | 1.31 | 1.19 | 4.2 | 62 | 3.79 | 39 | 86 | 6.4 | 0.0 | 0 | 0.2 | 0.2 | 0.0 | 0.0 |
-| Shades of Gray | gradient, photo-like | 9.26 | 9.06 | – | – | – | 16.5 | 695 | – | 51 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| Black and White Logo | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.58 | 9.33 | 0.059 | 1.02 | 2.22 | 1.4 | 29 | 2.88 | 39 | 69 | 0.3 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.71 | 11.98 | 0.186 | 1.00 | 105.61 | 1.8 | 17 | 1.47 | 16 | 86 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | circle, ellipses, badge with a hole, letter D | 2.98 | 19.28 | 0.524 | 2.19 | 2.18 | 1.2 | 14 | 1.65 | 11 | 79 | 0.3 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | lines | 2.62 | 9.44 | 0.055 | 0.96 | 105.82 | 5.4 | 46 | 2.29 | 41 | – | – | – | – | – | – | 0.1 | 0.0 |
-| Technical Drawing | polygons, star, letter A, lines | 2.54 | 9.65 | 0.084 | 1.02 | 105.82 | 4.8 | 46 | 3.23 | 71 | 73 | 0.8 | – | – | – | – | 1.2 | 0.0 |
-| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 |
+| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
+|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
+| Default | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.60 | 10.02 | 0.090 | 1.02 | 2.22 | 1.9 | 17 | 1.74 | 29 | 5 | 69 | 0.4 | – | – | 0.5 | 0.6 | 0.0 | 0.0 |
+| Auto Color | two touching halves, four-colour badge | 0.55 | 4.98 | 0.140 | 1.33 | 1.21 | 4.0 | 53 | 3.28 | 38 | 14 | 86 | 5.1 | 0.0 | 0 | 1.4 | 1.1 | 0.0 | 0.0 |
+| High Fidelity Photo | gradient, photo-like | 1.75 | 1.97 | – | – | – | 120.7 | 10001 | – | 38 | 36 | – | – | – | – | 0.0 | – | 10.3 | 0.0 |
+| Low Fidelity Photo | gradient, photo-like | 2.45 | 2.69 | – | – | – | 37.1 | 2118 | – | 41 | 36 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| 3 Colors | two touching halves | 0.42 | 3.98 | 0.104 | 0.91 | 0.91 | 2.0 | 11 | 1.81 | 39 | 6 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | two touching halves, four-colour badge | 0.55 | 4.98 | 0.140 | 1.34 | 1.19 | 4.0 | 50 | 3.13 | 38 | 14 | 86 | 5.2 | 0.0 | 0 | 0.2 | 0.3 | 0.0 | 0.0 |
+| 16 Colors | two touching halves, four-colour badge | 0.55 | 4.90 | 0.141 | 1.31 | 1.19 | 4.2 | 62 | 3.79 | 39 | 14 | 86 | 6.4 | 0.0 | 0 | 0.2 | 0.2 | 0.0 | 0.0 |
+| Shades of Gray | gradient, photo-like | 9.26 | 9.06 | – | – | – | 16.5 | 695 | – | 51 | 40 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| Black and White Logo | circle, ellipses, badge with a hole, letter D, polygons, star, letter A | 2.58 | 9.31 | 0.059 | 1.02 | 2.22 | 1.4 | 29 | 2.88 | 39 | 11 | 69 | 0.3 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.71 | 11.98 | 0.186 | 1.00 | 105.61 | 1.8 | 17 | 1.47 | 16 | 7 | 86 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | circle, ellipses, badge with a hole, letter D | 2.98 | 19.28 | 0.524 | 2.19 | 2.18 | 1.2 | 14 | 1.65 | 11 | 7 | 79 | 0.3 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | lines | 2.62 | 9.44 | 0.055 | 0.96 | 105.82 | 5.4 | 46 | 2.29 | 41 | 0 | – | – | – | – | – | – | 0.1 | 0.0 |
+| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.70 | 11.81 | 0.156 | 4.23 | 105.82 | 4.7 | 47 | 3.03 | 71 | 20 | 73 | 0.8 | – | – | – | – | 0.9 | 0.0 |
+| Outline | lines | 2.93 | 15.91 | 0.310 | 1.84 | 106.00 | 5.0 | 81 | 4.03 | 15 | 5 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 10 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 |
 
 ## 2. Each preset on each kind of input (clean, three sizes)
 
-| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
-|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
-| Default | curved shapes | 0.09 | 3.47 | 0.061 | 0.64 | 0.78 | 1.8 | 15 | 1.62 | 13 | 83 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | polygons | 0.05 | 2.12 | 0.035 | 0.43 | 1.24 | 2.0 | 14 | 1.26 | 88 | 89 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | thin lines | 0.53 | 4.28 | 0.045 | 0.47 | 105.51 | 3.3 | 23 | 1.15 | 48 | – | – | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | flat colour art | 19.91 | 17.97 | 0.172 | 0.51 | 179.34 | 1.5 | 16 | 1.17 | 14 | 0 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | gradient, photo | 39.03 | 38.65 | – | – | – | 3.2 | 601 | – | 54 | – | – | – | – | 19.1 | 38.4 | 0.0 | 0.0 |
-| High Fidelity Photo | curved shapes | 0.04 | 1.66 | 0.026 | 0.18 | 0.20 | 1.2 | 19 | 2.12 | 20 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| High Fidelity Photo | polygons | 0.05 | 1.88 | 0.031 | 0.51 | 1.34 | 1.7 | 16 | 1.43 | 88 | 89 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| High Fidelity Photo | thin lines | 0.34 | 5.96 | 0.075 | 0.85 | 4.31 | 40.3 | 339 | 16.93 | 37 | – | – | 27.3 | 4490 | 0.0 | – | 19.0 | 0.0 |
-| High Fidelity Photo | flat colour art | 0.14 | 4.16 | 0.030 | 0.20 | 0.20 | 3.5 | 73 | 4.62 | 35 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| High Fidelity Photo | gradient, photo | 1.80 | 2.04 | – | – | – | 134.7 | 11321 | – | 39 | – | – | – | – | 0.0 | – | 7.3 | 0.0 |
-| Low Fidelity Photo | curved shapes | 0.06 | 2.65 | 0.047 | 0.31 | 0.31 | 1.2 | 13 | 1.47 | 17 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | polygons | 0.05 | 2.15 | 0.036 | 0.51 | 1.34 | 1.7 | 14 | 1.22 | 88 | 89 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | thin lines | 0.51 | 5.69 | 0.083 | 0.86 | 45.41 | 7.0 | 56 | 2.80 | 47 | – | – | 4.0 | 3966 | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | flat colour art | 0.15 | 4.29 | 0.045 | 0.28 | 0.28 | 3.5 | 54 | 3.38 | 31 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | gradient, photo | 2.53 | 2.80 | – | – | – | 42.7 | 2282 | – | 41 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| 3 Colors | curved shapes | 0.06 | 2.65 | 0.047 | 0.31 | 0.31 | 1.8 | 16 | 1.70 | 15 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | polygons | 0.05 | 2.15 | 0.036 | 0.51 | 1.34 | 2.0 | 15 | 1.32 | 88 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | thin lines | 0.45 | 4.38 | 0.113 | 0.90 | 45.41 | 5.0 | 44 | 2.18 | 50 | – | – | 2.0 | 290 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | flat colour art | 1.31 | 3.61 | 0.125 | 0.90 | 60.25 | 2.5 | 25 | 1.86 | 45 | 100 | 0.0 | 1.0 | 9914 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | gradient, photo | 7.49 | 7.60 | – | – | – | 5.7 | 530 | – | 47 | – | – | – | – | 6.3 | 7.4 | 0.0 | 0.0 |
-| 6 Colors | curved shapes | 0.06 | 2.45 | 0.043 | 0.27 | 0.28 | 1.8 | 17 | 1.78 | 15 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | polygons | 0.05 | 2.08 | 0.035 | 0.51 | 1.34 | 2.0 | 15 | 1.33 | 88 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | thin lines | 0.50 | 4.49 | 0.102 | 0.86 | 45.41 | 4.0 | 33 | 1.65 | 53 | – | – | 1.7 | 396 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | flat colour art | 0.12 | 2.70 | 0.057 | 0.31 | 0.30 | 3.0 | 28 | 2.00 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | gradient, photo | 5.00 | 5.28 | – | – | – | 13.0 | 832 | – | 36 | – | – | – | – | 6.1 | 8.2 | 0.0 | 0.0 |
-| 16 Colors | curved shapes | 0.05 | 2.21 | 0.038 | 0.24 | 0.25 | 1.8 | 17 | 1.85 | 16 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | polygons | 0.05 | 1.97 | 0.032 | 0.51 | 1.34 | 2.0 | 16 | 1.39 | 88 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | thin lines | 0.41 | 3.77 | 0.110 | 0.86 | 23.65 | 8.7 | 50 | 2.52 | 52 | – | – | 5.7 | 305 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | flat colour art | 0.12 | 2.52 | 0.052 | 0.31 | 0.30 | 3.0 | 28 | 2.11 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | gradient, photo | 3.00 | 3.30 | – | – | – | 47.2 | 2132 | – | 27 | – | – | – | – | 12.3 | 18.0 | 0.0 | 0.0 |
-| Shades of Gray | curved shapes | 0.06 | 2.67 | 0.047 | 0.31 | 0.31 | 1.2 | 14 | 1.49 | 17 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| Shades of Gray | polygons | 0.05 | 2.08 | 0.035 | 0.47 | 1.25 | 1.7 | 14 | 1.22 | 88 | 90 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
-| Shades of Gray | thin lines | 0.55 | 6.55 | 0.083 | 0.86 | 45.40 | 10.3 | 73 | 3.67 | 50 | – | – | 8.0 | 4272 | 0.0 | – | 0.0 | 0.0 |
-| Shades of Gray | flat colour art | 7.33 | 11.24 | 0.257 | 1.43 | 179.39 | 4.7 | 200 | 18.45 | 22 | 50 | 0.3 | 3.7 | 173367 | 0.0 | – | 0.0 | 0.0 |
-| Shades of Gray | gradient, photo | 9.71 | 9.55 | – | – | – | 18.2 | 748 | – | 51 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| Black and White Logo | curved shapes | 0.03 | 1.49 | 0.024 | 0.51 | 0.59 | 1.2 | 21 | 2.23 | 20 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | polygons | 0.04 | 1.78 | 0.029 | 0.42 | 1.24 | 1.7 | 16 | 1.42 | 89 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | thin lines | 0.63 | 6.33 | 0.117 | 0.50 | 77.21 | 10.3 | 53 | 2.63 | 89 | – | – | – | – | – | – | 2.7 | 0.0 |
-| Black and White Logo | flat colour art | 19.90 | 17.76 | 0.157 | 0.30 | 179.51 | 1.0 | 18 | 1.12 | 23 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | gradient, photo | 38.98 | 38.54 | – | – | – | 9.0 | 573 | – | 70 | – | – | – | – | – | – | 1.2 | 0.0 |
-| Sketched Art | curved shapes | 0.14 | 5.67 | 0.109 | 0.46 | 0.46 | 1.2 | 12 | 1.38 | 16 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | polygons | 0.12 | 4.65 | 0.084 | 0.53 | 1.06 | 1.7 | 13 | 1.19 | 86 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | thin lines | 0.41 | 4.87 | 0.099 | 0.96 | 52.90 | 4.3 | 35 | 1.77 | 38 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | flat colour art | 20.25 | 19.55 | 0.146 | 1.15 | 179.63 | 1.5 | 26 | 1.53 | 16 | 0 | 0.3 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | gradient, photo | 45.43 | 45.21 | – | – | – | 1.0 | 240 | – | 44 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | curved shapes | 0.35 | 14.47 | 0.280 | 0.69 | 0.69 | 1.2 | 12 | 1.33 | 15 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | polygons | 0.34 | 13.60 | 0.255 | 0.65 | 0.69 | 1.7 | 14 | 1.22 | 77 | 85 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | thin lines | 1.10 | 15.03 | 0.296 | 1.37 | 17.91 | 5.0 | 37 | 1.83 | 44 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | flat colour art | 23.83 | 33.06 | 0.200 | 0.69 | 188.27 | 1.0 | 11 | 0.77 | 25 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | gradient, photo | 61.57 | 61.32 | – | – | – | 0.2 | 2 | – | 47 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Line Art | curved shapes | 0.04 | 1.85 | 0.032 | 0.54 | 0.62 | 1.2 | 16 | 1.76 | 19 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | polygons | 0.05 | 1.86 | 0.030 | 0.39 | 1.24 | 1.7 | 15 | 1.29 | 88 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | thin lines | 0.52 | 3.94 | 0.036 | 0.47 | 105.71 | 3.3 | 28 | 1.38 | 45 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Line Art | flat colour art | 19.90 | 17.83 | 0.162 | 0.42 | 179.43 | 1.0 | 18 | 1.30 | 21 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | gradient, photo | 38.98 | 38.54 | – | – | – | 7.7 | 471 | – | 57 | – | – | – | – | – | – | 0.2 | 0.0 |
-| Technical Drawing | curved shapes | 0.03 | 1.49 | 0.024 | 0.51 | 0.59 | 1.2 | 21 | 2.23 | 20 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | polygons | 0.04 | 1.79 | 0.029 | 0.42 | 1.24 | 1.7 | 16 | 1.41 | 90 | 90 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | thin lines | 0.53 | 5.80 | 0.121 | 0.50 | 55.74 | 15.3 | 70 | 3.50 | 88 | – | – | – | – | – | – | 7.7 | 0.0 |
-| Technical Drawing | flat colour art | 19.90 | 17.76 | 0.157 | 0.30 | 179.51 | 1.0 | 18 | 1.12 | 23 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | gradient, photo | 38.94 | 38.51 | – | – | – | 20.0 | 627 | – | 71 | – | – | – | – | – | – | 11.3 | 0.0 |
-| Flat Logo | curved shapes | 0.06 | 2.14 | 0.036 | 0.25 | 0.25 | 1.8 | 31 | 3.38 | 19 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
-| Flat Logo | polygons | 0.09 | 3.44 | 0.060 | 0.35 | 1.03 | 2.0 | 35 | 3.17 | 67 | 94 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
-| Flat Logo | thin lines | 1.17 | 11.78 | 0.050 | 0.49 | all | 3.0 | 189 | 9.45 | 28 | – | – | 0.0 | 0 | 5467.1 | – | 0.0 | 0.0 |
-| Flat Logo | flat colour art | 0.07 | 1.53 | 0.065 | 0.31 | 0.27 | 3.0 | 36 | 3.51 | 47 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
-| Flat Logo | gradient, photo | refused | | | | | | | | | | | | | | | | |
+| preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
+|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
+| Default | curved shapes | 0.09 | 3.47 | 0.061 | 0.64 | 0.78 | 1.8 | 15 | 1.62 | 13 | 10 | 83 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | polygons | 0.05 | 2.12 | 0.035 | 0.43 | 1.24 | 2.0 | 14 | 1.26 | 88 | 2 | 89 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | thin lines | 0.53 | 4.28 | 0.045 | 0.47 | 105.51 | 3.3 | 23 | 1.15 | 48 | 0 | – | – | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | askew shapes | 0.17 | 3.58 | 0.050 | 0.50 | 36.07 | 3.7 | 29 | 1.19 | 86 | 0 | – | – | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | flat colour art | 19.91 | 17.97 | 0.172 | 0.51 | 179.34 | 1.5 | 16 | 1.17 | 14 | 14 | 0 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | gradient, photo | 39.03 | 38.65 | – | – | – | 3.2 | 601 | – | 54 | 41 | – | – | – | – | 19.1 | 38.4 | 0.0 | 0.0 |
+| Auto Color | curved shapes | 0.06 | 2.45 | 0.043 | 0.27 | 0.28 | 1.8 | 17 | 1.78 | 15 | 12 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | polygons | 0.05 | 2.09 | 0.035 | 0.51 | 1.34 | 2.0 | 15 | 1.33 | 88 | 2 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | thin lines | 0.69 | 5.23 | 0.057 | 0.48 | 105.59 | 5.0 | 33 | 1.63 | 57 | 2 | – | – | 4.0 | 3216 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | askew shapes | 0.65 | 4.02 | 0.052 | 0.53 | 9.49 | 4.0 | 32 | 1.35 | 83 | 0 | – | – | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | flat colour art | 0.12 | 2.70 | 0.057 | 0.31 | 0.30 | 3.0 | 28 | 2.00 | 43 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | gradient, photo | 2.07 | 2.38 | – | – | – | 159.3 | 4430 | – | 19 | 8 | – | – | – | – | 22.7 | 32.4 | 0.0 | 0.0 |
+| High Fidelity Photo | curved shapes | 0.04 | 1.66 | 0.026 | 0.18 | 0.20 | 1.2 | 19 | 2.12 | 20 | 16 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| High Fidelity Photo | polygons | 0.05 | 1.88 | 0.031 | 0.51 | 1.34 | 1.7 | 16 | 1.43 | 88 | 3 | 89 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| High Fidelity Photo | thin lines | 0.34 | 5.96 | 0.075 | 0.85 | 4.31 | 40.3 | 339 | 16.93 | 37 | 4 | – | – | 27.3 | 4490 | 0.0 | – | 19.0 | 0.0 |
+| High Fidelity Photo | askew shapes | 0.17 | 4.07 | 0.102 | 0.94 | 1.73 | 8.7 | 182 | 7.58 | 57 | 3 | – | – | 4.3 | 3998 | 0.0 | – | 1.0 | 0.0 |
+| High Fidelity Photo | flat colour art | 0.14 | 4.16 | 0.030 | 0.20 | 0.20 | 3.5 | 73 | 4.62 | 35 | 24 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| High Fidelity Photo | gradient, photo | 1.80 | 2.04 | – | – | – | 134.7 | 11321 | – | 39 | 37 | – | – | – | – | 0.0 | – | 7.3 | 0.0 |
+| Low Fidelity Photo | curved shapes | 0.06 | 2.65 | 0.047 | 0.31 | 0.31 | 1.2 | 13 | 1.47 | 17 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | polygons | 0.05 | 2.15 | 0.036 | 0.51 | 1.34 | 1.7 | 14 | 1.22 | 88 | 3 | 89 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | thin lines | 0.51 | 5.69 | 0.083 | 0.86 | 45.41 | 7.0 | 56 | 2.80 | 47 | 4 | – | – | 4.0 | 3966 | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | askew shapes | 0.25 | 5.00 | 0.064 | 0.70 | 21.54 | 6.0 | 49 | 2.06 | 70 | 3 | – | – | 2.3 | 2635 | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | flat colour art | 0.15 | 4.29 | 0.045 | 0.28 | 0.28 | 3.5 | 54 | 3.38 | 31 | 19 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | gradient, photo | 2.53 | 2.80 | – | – | – | 42.7 | 2282 | – | 41 | 37 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| 3 Colors | curved shapes | 0.06 | 2.65 | 0.047 | 0.31 | 0.31 | 1.8 | 16 | 1.70 | 15 | 12 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | polygons | 0.05 | 2.15 | 0.036 | 0.51 | 1.34 | 2.0 | 15 | 1.32 | 88 | 2 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | thin lines | 0.45 | 4.38 | 0.113 | 0.90 | 45.41 | 5.0 | 44 | 2.18 | 50 | 6 | – | – | 2.0 | 290 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | askew shapes | 0.20 | 3.95 | 0.060 | 0.67 | 14.60 | 4.0 | 32 | 1.32 | 80 | 0 | – | – | 0.7 | 22 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | flat colour art | 1.31 | 3.61 | 0.125 | 0.90 | 60.25 | 2.5 | 25 | 1.86 | 45 | 21 | 100 | 0.0 | 1.0 | 9914 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | gradient, photo | 7.49 | 7.60 | – | – | – | 5.7 | 530 | – | 47 | 39 | – | – | – | – | 6.3 | 7.4 | 0.0 | 0.0 |
+| 6 Colors | curved shapes | 0.06 | 2.45 | 0.043 | 0.27 | 0.28 | 1.8 | 17 | 1.78 | 15 | 12 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | polygons | 0.05 | 2.08 | 0.035 | 0.51 | 1.34 | 2.0 | 15 | 1.33 | 88 | 2 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | thin lines | 0.50 | 4.49 | 0.102 | 0.86 | 45.41 | 4.0 | 33 | 1.65 | 53 | 6 | – | – | 1.7 | 396 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | askew shapes | 0.19 | 3.81 | 0.058 | 0.70 | 36.07 | 4.0 | 33 | 1.39 | 73 | 3 | – | – | 0.3 | 11 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | flat colour art | 0.12 | 2.70 | 0.057 | 0.31 | 0.30 | 3.0 | 28 | 2.00 | 43 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | gradient, photo | 5.00 | 5.28 | – | – | – | 13.0 | 832 | – | 36 | 28 | – | – | – | – | 6.1 | 8.2 | 0.0 | 0.0 |
+| 16 Colors | curved shapes | 0.05 | 2.21 | 0.038 | 0.24 | 0.25 | 1.8 | 17 | 1.85 | 16 | 12 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | polygons | 0.05 | 1.97 | 0.032 | 0.51 | 1.34 | 2.0 | 16 | 1.39 | 88 | 2 | 89 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | thin lines | 0.41 | 3.77 | 0.110 | 0.86 | 23.65 | 8.7 | 50 | 2.52 | 52 | 6 | – | – | 5.7 | 305 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | askew shapes | 0.18 | 3.73 | 0.062 | 0.70 | 21.54 | 4.3 | 38 | 1.60 | 70 | 3 | – | – | 0.7 | 15 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | flat colour art | 0.12 | 2.52 | 0.052 | 0.31 | 0.30 | 3.0 | 28 | 2.11 | 43 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | gradient, photo | 3.00 | 3.30 | – | – | – | 47.2 | 2132 | – | 27 | 16 | – | – | – | – | 12.3 | 18.0 | 0.0 | 0.0 |
+| Shades of Gray | curved shapes | 0.06 | 2.67 | 0.047 | 0.31 | 0.31 | 1.2 | 14 | 1.49 | 17 | 15 | 100 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| Shades of Gray | polygons | 0.05 | 2.08 | 0.035 | 0.47 | 1.25 | 1.7 | 14 | 1.22 | 88 | 3 | 90 | 0.0 | 0.0 | 0 | 0.0 | – | 0.0 | 0.0 |
+| Shades of Gray | thin lines | 0.55 | 6.55 | 0.083 | 0.86 | 45.40 | 10.3 | 73 | 3.67 | 50 | 4 | – | – | 8.0 | 4272 | 0.0 | – | 0.0 | 0.0 |
+| Shades of Gray | askew shapes | 0.25 | 5.03 | 0.057 | 0.73 | 21.56 | 6.0 | 46 | 1.93 | 78 | 0 | – | – | 2.3 | 2636 | 0.0 | – | 0.0 | 0.0 |
+| Shades of Gray | flat colour art | 7.33 | 11.24 | 0.257 | 1.43 | 179.39 | 4.7 | 200 | 18.45 | 22 | 21 | 50 | 0.3 | 3.7 | 173367 | 0.0 | – | 0.0 | 0.0 |
+| Shades of Gray | gradient, photo | 9.71 | 9.55 | – | – | – | 18.2 | 748 | – | 51 | 40 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| Black and White Logo | curved shapes | 0.03 | 1.49 | 0.024 | 0.51 | 0.59 | 1.2 | 21 | 2.23 | 20 | 20 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | polygons | 0.04 | 1.75 | 0.028 | 0.42 | 1.24 | 1.7 | 16 | 1.42 | 89 | 7 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | thin lines | 0.63 | 6.34 | 0.118 | 0.50 | 77.21 | 10.3 | 53 | 2.63 | 89 | 7 | – | – | – | – | – | – | 2.3 | 0.0 |
+| Black and White Logo | askew shapes | 0.79 | 18.38 | 0.489 | 4.23 | 9.63 | 4.0 | 47 | 1.97 | 92 | 91 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | flat colour art | 19.90 | 17.76 | 0.157 | 0.30 | 179.51 | 1.0 | 18 | 1.12 | 23 | 23 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | gradient, photo | 38.98 | 38.54 | – | – | – | 9.0 | 573 | – | 70 | 51 | – | – | – | – | – | – | 1.2 | 0.0 |
+| Sketched Art | curved shapes | 0.14 | 5.67 | 0.109 | 0.46 | 0.46 | 1.2 | 12 | 1.38 | 16 | 11 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | polygons | 0.12 | 4.65 | 0.084 | 0.53 | 1.06 | 1.7 | 13 | 1.19 | 86 | 3 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | thin lines | 0.41 | 4.87 | 0.099 | 0.96 | 52.90 | 4.3 | 35 | 1.77 | 38 | 10 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | askew shapes | 0.30 | 5.59 | 0.078 | 0.46 | 35.95 | 3.3 | 29 | 1.21 | 81 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | flat colour art | 20.25 | 19.55 | 0.146 | 1.15 | 179.63 | 1.5 | 26 | 1.53 | 16 | 16 | 0 | 0.3 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | gradient, photo | 45.43 | 45.21 | – | – | – | 1.0 | 240 | – | 44 | 35 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | curved shapes | 0.35 | 14.47 | 0.280 | 0.69 | 0.69 | 1.2 | 12 | 1.33 | 15 | 10 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | polygons | 0.34 | 13.60 | 0.255 | 0.65 | 0.69 | 1.7 | 14 | 1.22 | 77 | 3 | 85 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | thin lines | 1.10 | 15.03 | 0.296 | 1.37 | 17.91 | 5.0 | 37 | 1.83 | 44 | 6 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | askew shapes | 0.58 | 14.76 | 0.292 | 0.56 | 0.56 | 4.0 | 27 | 1.11 | 86 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | flat colour art | 23.83 | 33.06 | 0.200 | 0.69 | 188.27 | 1.0 | 11 | 0.77 | 25 | 25 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | gradient, photo | 61.57 | 61.32 | – | – | – | 0.2 | 2 | – | 47 | 21 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Line Art | curved shapes | 0.04 | 1.85 | 0.032 | 0.54 | 0.62 | 1.2 | 16 | 1.76 | 19 | 15 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | polygons | 0.05 | 1.86 | 0.030 | 0.39 | 1.24 | 1.7 | 15 | 1.29 | 88 | 3 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | thin lines | 0.52 | 3.94 | 0.036 | 0.47 | 105.71 | 3.3 | 28 | 1.38 | 45 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Line Art | askew shapes | 0.14 | 3.35 | 0.048 | 0.54 | 9.60 | 4.0 | 34 | 1.40 | 84 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Line Art | flat colour art | 19.90 | 17.83 | 0.162 | 0.42 | 179.43 | 1.0 | 18 | 1.30 | 21 | 21 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | gradient, photo | 38.98 | 38.54 | – | – | – | 7.7 | 471 | – | 57 | 44 | – | – | – | – | – | – | 0.2 | 0.0 |
+| Technical Drawing | curved shapes | 0.03 | 1.49 | 0.024 | 0.51 | 0.59 | 1.2 | 21 | 2.23 | 20 | 20 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | polygons | 0.04 | 1.76 | 0.028 | 0.42 | 1.24 | 1.7 | 16 | 1.41 | 90 | 7 | 90 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | thin lines | 0.53 | 5.81 | 0.121 | 0.50 | 55.69 | 15.3 | 70 | 3.50 | 88 | 7 | – | – | – | – | – | – | 7.3 | 0.0 |
+| Technical Drawing | askew shapes | 0.87 | 20.26 | 0.587 | 4.23 | 4.27 | 4.3 | 35 | 1.47 | 95 | 95 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | flat colour art | 19.90 | 17.76 | 0.157 | 0.30 | 179.51 | 1.0 | 18 | 1.12 | 23 | 23 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | gradient, photo | 38.94 | 38.51 | – | – | – | 20.0 | 627 | – | 71 | 49 | – | – | – | – | – | – | 11.3 | 0.0 |
+| Outline | curved shapes | 23.38 | 44.70 | 0.498 | 0.90 | 0.52 | 1.2 | 16 | 1.76 | 19 | 15 | 83 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Outline | polygons | 17.94 | 44.20 | 0.494 | 0.83 | 0.74 | 1.7 | 15 | 1.29 | 88 | 3 | 89 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Outline | thin lines | 0.99 | 14.15 | 0.310 | 1.82 | 106.00 | 3.3 | 88 | 4.40 | 25 | 7 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Outline | askew shapes | 23.75 | 38.13 | 0.467 | 1.62 | 9.82 | 4.0 | 32 | 1.35 | 83 | 7 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Outline | flat colour art | 26.69 | 32.18 | 0.494 | 0.92 | 178.93 | 1.0 | 18 | 1.30 | 21 | 21 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Outline | gradient, photo | 39.57 | 39.32 | – | – | – | 7.5 | 421 | – | 56 | 43 | – | – | – | – | – | – | 0.0 | 0.8 |
+| Flat Logo | curved shapes | 0.06 | 2.14 | 0.036 | 0.25 | 0.25 | 1.8 | 31 | 3.38 | 19 | 6 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
+| Flat Logo | polygons | 0.09 | 3.44 | 0.060 | 0.35 | 1.03 | 2.0 | 35 | 3.17 | 67 | 0 | 94 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
+| Flat Logo | thin lines | 1.17 | 11.78 | 0.050 | 0.49 | all | 3.0 | 189 | 9.45 | 28 | 9 | – | – | 0.0 | 0 | 5467.1 | – | 0.0 | 0.0 |
+| Flat Logo | askew shapes | 0.15 | 3.78 | 0.058 | 0.43 | 0.50 | 4.0 | 114 | 4.76 | 39 | 0 | – | – | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
+| Flat Logo | flat colour art | 0.07 | 1.53 | 0.065 | 0.31 | 0.27 | 3.0 | 36 | 3.51 | 47 | 11 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
+| Flat Logo | gradient, photo | refused | | | | | | | | | | | | | | | | | |
 
 ## 3. Each preset on its inputs, by variant (256 px)
 
-| preset | variant | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
-|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
-| Default | clean | 0.07 | 2.89 | 0.050 | 0.64 | 1.24 | 1.9 | 15 | 1.46 | 45 | 88 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | aliased | 0.37 | 20.23 | 0.233 | 1.02 | 1.35 | 1.9 | 15 | 1.45 | 21 | 96 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | blurred | 0.81 | 16.57 | 0.078 | 0.98 | 2.22 | 1.9 | 24 | 2.34 | 5 | 19 | 1.3 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
-| Default | noisy | 1.74 | 4.53 | 0.054 | 0.54 | 1.32 | 1.9 | 15 | 1.47 | 41 | 84 | 0.0 | – | – | 1.9 | 0.3 | 0.0 | 0.0 |
-| Default | scanned | 15.06 | 20.17 | 0.114 | 0.79 | 2.14 | 1.9 | 26 | 2.53 | 2 | 25 | 1.3 | – | – | 1.6 | 4.2 | 0.0 | 0.0 |
-| High Fidelity Photo | clean | 1.80 | 2.04 | – | – | – | 134.7 | 11321 | – | 39 | – | – | – | – | 0.0 | – | 7.3 | 0.0 |
-| High Fidelity Photo | aliased | 1.77 | 2.00 | – | – | – | 73.0 | 8004 | – | 40 | – | – | – | – | 0.0 | – | 5.5 | 0.0 |
-| High Fidelity Photo | blurred | 1.59 | 1.95 | – | – | – | 72.0 | 7388 | – | 40 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| High Fidelity Photo | noisy | 2.02 | 2.18 | – | – | – | 155.5 | 10856 | – | 33 | – | – | – | – | 0.0 | – | 18.5 | 0.0 |
-| High Fidelity Photo | scanned | 1.45 | 1.55 | – | – | – | 140.5 | 9795 | – | 36 | – | – | – | – | 0.0 | – | 25.5 | 0.0 |
-| Low Fidelity Photo | clean | 2.53 | 2.80 | – | – | – | 42.7 | 2282 | – | 41 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | aliased | 2.53 | 2.78 | – | – | – | 36.5 | 1498 | – | 44 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | blurred | 2.35 | 2.75 | – | – | – | 29.0 | 2005 | – | 42 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | noisy | 2.70 | 2.85 | – | – | – | 32.0 | 1926 | – | 41 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| Low Fidelity Photo | scanned | 1.95 | 2.04 | – | – | – | 34.5 | 2548 | – | 39 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| 3 Colors | clean | 0.06 | 2.00 | 0.070 | 0.31 | 0.30 | 2.0 | 11 | 1.78 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | aliased | 0.13 | 8.77 | 0.242 | 0.91 | 0.91 | 2.0 | 12 | 2.00 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | blurred | 0.34 | 7.83 | 0.073 | 0.24 | 0.24 | 2.0 | 9 | 1.50 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | noisy | 0.71 | 2.03 | 0.114 | 0.32 | 0.32 | 2.0 | 11 | 1.83 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 3 Colors | scanned | 1.57 | 3.22 | 0.089 | 0.30 | 0.30 | 2.0 | 12 | 2.00 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | clean | 0.12 | 2.70 | 0.057 | 0.31 | 0.30 | 3.0 | 28 | 2.00 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | aliased | 0.29 | 10.43 | 0.298 | 1.00 | 1.00 | 3.0 | 27 | 2.05 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | blurred | 0.62 | 9.33 | 0.204 | 1.34 | 1.19 | 6.0 | 98 | 5.46 | 39 | 50 | 16.0 | 0.0 | 0 | 0.6 | 0.0 | 0.0 | 0.0 |
-| 6 Colors | noisy | 0.85 | 2.58 | 0.076 | 0.52 | 0.58 | 3.0 | 34 | 2.34 | 28 | 88 | 0.0 | 0.0 | 0 | 0.3 | 0.3 | 0.0 | 0.0 |
-| 6 Colors | scanned | 1.74 | 4.42 | 0.228 | 1.20 | 0.94 | 7.0 | 108 | 6.10 | 28 | 62 | 20.5 | 0.0 | 0 | 0.8 | 1.6 | 0.0 | 0.0 |
-| 16 Colors | clean | 0.12 | 2.52 | 0.052 | 0.31 | 0.30 | 3.0 | 28 | 2.11 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | aliased | 0.29 | 10.38 | 0.290 | 1.00 | 1.00 | 3.0 | 31 | 2.25 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | blurred | 0.63 | 9.38 | 0.215 | 1.31 | 1.19 | 7.0 | 132 | 7.21 | 42 | 50 | 21.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
-| 16 Colors | noisy | 0.85 | 2.56 | 0.075 | 0.52 | 0.58 | 3.0 | 35 | 2.45 | 27 | 88 | 0.0 | 0.0 | 0 | 0.2 | 0.2 | 0.0 | 0.0 |
-| 16 Colors | scanned | 1.72 | 4.43 | 0.256 | 1.09 | 0.96 | 7.5 | 151 | 8.31 | 33 | 62 | 24.0 | 0.0 | 0 | 1.2 | 1.2 | 0.0 | 0.0 |
-| Shades of Gray | clean | 9.71 | 9.55 | – | – | – | 18.2 | 748 | – | 51 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| Shades of Gray | aliased | 9.71 | 9.52 | – | – | – | 11.0 | 642 | – | 57 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| Shades of Gray | blurred | 9.66 | 9.32 | – | – | – | 11.5 | 577 | – | 55 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
-| Shades of Gray | noisy | 9.74 | 9.45 | – | – | – | 19.5 | 643 | – | 45 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
-| Shades of Gray | scanned | 6.58 | 6.46 | – | – | – | 19.0 | 762 | – | 47 | – | – | – | – | 0.0 | – | 1.0 | 0.0 |
-| Black and White Logo | clean | 0.04 | 1.62 | 0.026 | 0.51 | 1.24 | 1.4 | 19 | 1.89 | 50 | 88 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | aliased | 0.39 | 20.35 | 0.172 | 1.02 | 1.35 | 1.4 | 22 | 2.32 | 53 | 96 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | blurred | 0.80 | 16.24 | 0.049 | 0.84 | 2.22 | 1.4 | 40 | 3.92 | 21 | 19 | 1.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | noisy | 1.72 | 3.86 | 0.027 | 0.49 | 1.32 | 1.4 | 21 | 2.12 | 42 | 84 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Black and White Logo | scanned | 15.05 | 20.00 | 0.090 | 0.79 | 2.10 | 1.4 | 63 | 6.11 | 9 | 25 | 1.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | clean | 0.19 | 5.51 | 0.107 | 0.96 | 52.90 | 1.9 | 17 | 1.46 | 20 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | aliased | 0.47 | 19.58 | 0.213 | 1.00 | 105.54 | 1.6 | 11 | 1.10 | 26 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | blurred | 1.05 | 19.32 | 0.242 | 0.76 | 105.55 | 1.6 | 19 | 1.59 | 9 | 50 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | noisy | 1.76 | 6.13 | 0.116 | 0.90 | 1.06 | 2.0 | 18 | 1.48 | 12 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Sketched Art | scanned | 15.10 | 22.32 | 0.407 | 0.78 | 105.61 | 1.6 | 21 | 1.75 | 2 | 50 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | clean | 0.35 | 14.47 | 0.280 | 0.69 | 0.69 | 1.2 | 12 | 1.33 | 15 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | aliased | 0.39 | 21.69 | 0.289 | 1.00 | 1.00 | 1.2 | 9 | 0.99 | 12 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | blurred | 1.24 | 28.75 | 0.818 | 1.44 | 1.92 | 1.2 | 14 | 1.72 | 10 | 50 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | noisy | 2.11 | 11.05 | 0.284 | 0.68 | 0.69 | 1.2 | 11 | 1.28 | 9 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Silhouettes | scanned | 16.03 | 30.07 | 1.438 | 2.19 | 2.18 | 1.2 | 28 | 3.55 | 3 | 0 | 2.0 | – | – | – | – | 0.0 | 0.0 |
-| Line Art | clean | 0.52 | 3.94 | 0.036 | 0.47 | 105.71 | 3.3 | 28 | 1.38 | 45 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Line Art | aliased | 0.67 | 14.44 | 0.112 | 0.73 | 55.44 | 14.0 | 59 | 2.95 | 87 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Line Art | blurred | 1.56 | 16.20 | 0.068 | 0.96 | 105.82 | 3.0 | 53 | 2.65 | 19 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Line Art | noisy | 1.02 | 3.98 | 0.030 | 0.50 | 56.08 | 8.0 | 56 | 2.80 | 42 | – | – | – | – | – | – | 1.0 | 0.0 |
-| Line Art | scanned | 13.55 | 19.60 | 0.069 | 0.87 | 105.78 | 3.0 | 70 | 3.50 | 4 | – | – | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | clean | 0.17 | 2.79 | 0.052 | 0.50 | 55.74 | 5.1 | 30 | 1.93 | 89 | 90 | 0.0 | – | – | – | – | 1.9 | 0.0 |
-| Technical Drawing | aliased | 0.43 | 18.51 | 0.204 | 1.02 | 55.44 | 6.8 | 33 | 2.06 | 95 | 94 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | blurred | 1.03 | 16.48 | 0.076 | 0.96 | 105.82 | 2.0 | 58 | 4.73 | 26 | 25 | 2.7 | – | – | – | – | 0.0 | 0.0 |
-| Technical Drawing | noisy | 1.41 | 4.24 | 0.053 | 0.50 | 31.79 | 7.8 | 41 | 2.51 | 85 | 86 | 0.0 | – | – | – | – | 2.8 | 0.0 |
-| Technical Drawing | scanned | 14.44 | 19.98 | 0.100 | 0.87 | 105.79 | 2.0 | 98 | 7.51 | 23 | 34 | 2.7 | – | – | – | – | 0.0 | 0.0 |
-| Flat Logo | clean | 0.07 | 1.53 | 0.065 | 0.31 | 0.27 | 3.0 | 36 | 3.51 | 47 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
-| Flat Logo | aliased | 0.13 | 5.87 | 0.218 | 0.65 | 0.65 | 3.0 | 31 | 1.96 | 44 | 50 | 0.0 | 0.0 | 0 | 5.8 | – | 0.0 | 0.0 |
-| Flat Logo | blurred | 0.54 | 8.33 | 0.052 | 0.62 | 0.78 | 3.0 | 28 | 1.78 | 43 | 50 | 0.0 | 0.0 | 0 | 5.8 | – | 0.0 | 0.0 |
-| Flat Logo | noisy | 0.81 | 1.77 | 0.076 | 0.39 | 0.32 | 3.5 | 44 | 2.63 | 31 | 100 | 1.0 | 0.0 | 0 | 6.9 | – | 0.5 | 0.0 |
-| Flat Logo | scanned | 1.31 | 4.15 | 21.204 | 88.50 | 0.66 | 470.5 | 2251 | 255.53 | 11 | 62 | 1658.0 | 0.0 | 0 | 58.0 | – | 413.5 | 0.2 |
+| preset | variant | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
+|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
+| Default | clean | 0.07 | 2.89 | 0.050 | 0.64 | 1.24 | 1.9 | 15 | 1.46 | 45 | 7 | 88 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | aliased | 0.37 | 20.23 | 0.233 | 1.02 | 1.35 | 1.9 | 15 | 1.45 | 21 | 8 | 96 | 0.0 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | blurred | 0.81 | 16.57 | 0.078 | 0.98 | 2.22 | 1.9 | 24 | 2.34 | 5 | 5 | 19 | 1.3 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
+| Default | noisy | 1.74 | 4.53 | 0.054 | 0.54 | 1.32 | 1.9 | 15 | 1.47 | 41 | 0 | 84 | 0.0 | – | – | 1.9 | 0.3 | 0.0 | 0.0 |
+| Default | scanned | 15.06 | 20.17 | 0.114 | 0.79 | 2.14 | 1.9 | 26 | 2.53 | 2 | 0 | 25 | 1.3 | – | – | 1.6 | 4.2 | 0.0 | 0.0 |
+| Auto Color | clean | 0.12 | 2.70 | 0.057 | 0.31 | 0.30 | 3.0 | 28 | 2.00 | 43 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | aliased | 0.29 | 10.43 | 0.298 | 1.00 | 1.00 | 3.0 | 27 | 2.05 | 43 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | blurred | 0.61 | 9.31 | 0.208 | 1.33 | 1.21 | 6.0 | 119 | 6.53 | 39 | 11 | 50 | 15.5 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| Auto Color | noisy | 0.85 | 2.61 | 0.076 | 0.52 | 0.58 | 3.0 | 34 | 2.34 | 28 | 0 | 88 | 0.0 | 0.0 | 0 | 0.3 | 0.5 | 0.0 | 0.0 |
+| Auto Color | scanned | 1.73 | 4.42 | 0.230 | 1.20 | 0.94 | 7.0 | 108 | 6.02 | 28 | 0 | 62 | 20.5 | 0.0 | 0 | 9.6 | 7.5 | 0.0 | 0.0 |
+| High Fidelity Photo | clean | 1.80 | 2.04 | – | – | – | 134.7 | 11321 | – | 39 | 37 | – | – | – | – | 0.0 | – | 7.3 | 0.0 |
+| High Fidelity Photo | aliased | 1.77 | 2.00 | – | – | – | 73.0 | 8004 | – | 40 | 38 | – | – | – | – | 0.0 | – | 5.5 | 0.0 |
+| High Fidelity Photo | blurred | 1.59 | 1.95 | – | – | – | 72.0 | 7388 | – | 40 | 39 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| High Fidelity Photo | noisy | 2.02 | 2.18 | – | – | – | 155.5 | 10856 | – | 33 | 31 | – | – | – | – | 0.0 | – | 18.5 | 0.0 |
+| High Fidelity Photo | scanned | 1.45 | 1.55 | – | – | – | 140.5 | 9795 | – | 36 | 34 | – | – | – | – | 0.0 | – | 25.5 | 0.0 |
+| Low Fidelity Photo | clean | 2.53 | 2.80 | – | – | – | 42.7 | 2282 | – | 41 | 37 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | aliased | 2.53 | 2.78 | – | – | – | 36.5 | 1498 | – | 44 | 38 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | blurred | 2.35 | 2.75 | – | – | – | 29.0 | 2005 | – | 42 | 37 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | noisy | 2.70 | 2.85 | – | – | – | 32.0 | 1926 | – | 41 | 38 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| Low Fidelity Photo | scanned | 1.95 | 2.04 | – | – | – | 34.5 | 2548 | – | 39 | 32 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| 3 Colors | clean | 0.06 | 2.00 | 0.070 | 0.31 | 0.30 | 2.0 | 11 | 1.78 | 39 | 0 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | aliased | 0.13 | 8.77 | 0.242 | 0.91 | 0.91 | 2.0 | 12 | 2.00 | 39 | 39 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | blurred | 0.34 | 7.83 | 0.073 | 0.24 | 0.24 | 2.0 | 9 | 1.50 | 39 | 0 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | noisy | 0.71 | 2.03 | 0.114 | 0.32 | 0.32 | 2.0 | 11 | 1.83 | 39 | 0 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 3 Colors | scanned | 1.57 | 3.22 | 0.089 | 0.30 | 0.30 | 2.0 | 12 | 2.00 | 39 | 0 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | clean | 0.12 | 2.70 | 0.057 | 0.31 | 0.30 | 3.0 | 28 | 2.00 | 43 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | aliased | 0.29 | 10.43 | 0.298 | 1.00 | 1.00 | 3.0 | 27 | 2.05 | 43 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | blurred | 0.62 | 9.33 | 0.204 | 1.34 | 1.19 | 6.0 | 98 | 5.46 | 39 | 11 | 50 | 16.0 | 0.0 | 0 | 0.6 | 0.0 | 0.0 | 0.0 |
+| 6 Colors | noisy | 0.85 | 2.58 | 0.076 | 0.52 | 0.58 | 3.0 | 34 | 2.34 | 28 | 0 | 88 | 0.0 | 0.0 | 0 | 0.3 | 0.3 | 0.0 | 0.0 |
+| 6 Colors | scanned | 1.74 | 4.42 | 0.228 | 1.20 | 0.94 | 7.0 | 108 | 6.10 | 28 | 0 | 62 | 20.5 | 0.0 | 0 | 0.8 | 1.6 | 0.0 | 0.0 |
+| 16 Colors | clean | 0.12 | 2.52 | 0.052 | 0.31 | 0.30 | 3.0 | 28 | 2.11 | 43 | 14 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | aliased | 0.29 | 10.38 | 0.290 | 1.00 | 1.00 | 3.0 | 31 | 2.25 | 43 | 43 | 100 | 0.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | blurred | 0.63 | 9.38 | 0.215 | 1.31 | 1.19 | 7.0 | 132 | 7.21 | 42 | 13 | 50 | 21.0 | 0.0 | 0 | 0.0 | 0.0 | 0.0 | 0.0 |
+| 16 Colors | noisy | 0.85 | 2.56 | 0.075 | 0.52 | 0.58 | 3.0 | 35 | 2.45 | 27 | 0 | 88 | 0.0 | 0.0 | 0 | 0.2 | 0.2 | 0.0 | 0.0 |
+| 16 Colors | scanned | 1.72 | 4.43 | 0.256 | 1.09 | 0.96 | 7.5 | 151 | 8.31 | 33 | 0 | 62 | 24.0 | 0.0 | 0 | 1.2 | 1.2 | 0.0 | 0.0 |
+| Shades of Gray | clean | 9.71 | 9.55 | – | – | – | 18.2 | 748 | – | 51 | 40 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| Shades of Gray | aliased | 9.71 | 9.52 | – | – | – | 11.0 | 642 | – | 57 | 40 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| Shades of Gray | blurred | 9.66 | 9.32 | – | – | – | 11.5 | 577 | – | 55 | 41 | – | – | – | – | 0.0 | – | 0.5 | 0.0 |
+| Shades of Gray | noisy | 9.74 | 9.45 | – | – | – | 19.5 | 643 | – | 45 | 37 | – | – | – | – | 0.0 | – | 0.0 | 0.0 |
+| Shades of Gray | scanned | 6.58 | 6.46 | – | – | – | 19.0 | 762 | – | 47 | 37 | – | – | – | – | 0.0 | – | 1.0 | 0.0 |
+| Black and White Logo | clean | 0.04 | 1.60 | 0.026 | 0.51 | 1.24 | 1.4 | 19 | 1.89 | 50 | 14 | 88 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | aliased | 0.38 | 20.25 | 0.172 | 1.02 | 1.35 | 1.4 | 22 | 2.32 | 53 | 14 | 96 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | blurred | 0.80 | 16.24 | 0.048 | 0.84 | 2.22 | 1.4 | 40 | 3.92 | 21 | 13 | 19 | 1.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | noisy | 1.72 | 3.86 | 0.028 | 0.49 | 1.32 | 1.4 | 21 | 2.12 | 42 | 5 | 84 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Black and White Logo | scanned | 15.05 | 20.00 | 0.090 | 0.79 | 2.10 | 1.4 | 63 | 6.11 | 9 | 1 | 25 | 1.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | clean | 0.19 | 5.51 | 0.107 | 0.96 | 52.90 | 1.9 | 17 | 1.46 | 20 | 11 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | aliased | 0.47 | 19.58 | 0.213 | 1.00 | 105.54 | 1.6 | 11 | 1.10 | 26 | 9 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | blurred | 1.05 | 19.32 | 0.242 | 0.76 | 105.55 | 1.6 | 19 | 1.59 | 9 | 7 | 50 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | noisy | 1.76 | 6.13 | 0.116 | 0.90 | 1.06 | 2.0 | 18 | 1.48 | 12 | 0 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Sketched Art | scanned | 15.10 | 22.32 | 0.407 | 0.78 | 105.61 | 1.6 | 21 | 1.75 | 2 | 0 | 50 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | clean | 0.35 | 14.47 | 0.280 | 0.69 | 0.69 | 1.2 | 12 | 1.33 | 15 | 10 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | aliased | 0.39 | 21.69 | 0.289 | 1.00 | 1.00 | 1.2 | 9 | 0.99 | 12 | 9 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | blurred | 1.24 | 28.75 | 0.818 | 1.44 | 1.92 | 1.2 | 14 | 1.72 | 10 | 10 | 50 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | noisy | 2.11 | 11.05 | 0.284 | 0.68 | 0.69 | 1.2 | 11 | 1.28 | 9 | 0 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Silhouettes | scanned | 16.03 | 30.07 | 1.438 | 2.19 | 2.18 | 1.2 | 28 | 3.55 | 3 | 0 | 0 | 2.0 | – | – | – | – | 0.0 | 0.0 |
+| Line Art | clean | 0.52 | 3.94 | 0.036 | 0.47 | 105.71 | 3.3 | 28 | 1.38 | 45 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Line Art | aliased | 0.67 | 14.44 | 0.112 | 0.73 | 55.44 | 14.0 | 59 | 2.95 | 87 | 1 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Line Art | blurred | 1.56 | 16.20 | 0.068 | 0.96 | 105.82 | 3.0 | 53 | 2.65 | 19 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Line Art | noisy | 1.02 | 3.98 | 0.030 | 0.50 | 56.08 | 8.0 | 56 | 2.80 | 42 | 0 | – | – | – | – | – | – | 1.0 | 0.0 |
+| Line Art | scanned | 13.55 | 19.60 | 0.069 | 0.87 | 105.78 | 3.0 | 70 | 3.50 | 4 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | clean | 0.31 | 6.27 | 0.159 | 4.23 | 55.69 | 4.9 | 31 | 1.84 | 90 | 25 | 90 | 0.0 | – | – | – | – | 1.5 | 0.0 |
+| Technical Drawing | aliased | 0.56 | 20.39 | 0.275 | 2.42 | 55.44 | 6.2 | 31 | 1.85 | 96 | 28 | 94 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | blurred | 1.07 | 16.65 | 0.083 | 1.11 | 105.82 | 2.4 | 64 | 4.53 | 24 | 6 | 25 | 2.7 | – | – | – | – | 0.0 | 0.0 |
+| Technical Drawing | noisy | 1.67 | 6.57 | 0.149 | 2.14 | 31.79 | 7.0 | 38 | 2.21 | 88 | 26 | 86 | 0.0 | – | – | – | – | 2.2 | 0.0 |
+| Technical Drawing | scanned | 14.70 | 20.26 | 0.110 | 1.13 | 105.79 | 2.4 | 105 | 7.09 | 21 | 4 | 34 | 2.7 | – | – | – | – | 0.0 | 0.0 |
+| Outline | clean | 0.99 | 14.15 | 0.310 | 1.82 | 106.00 | 3.3 | 88 | 4.40 | 25 | 7 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Outline | aliased | 0.79 | 17.03 | 0.300 | 1.08 | 55.51 | 11.0 | 93 | 4.65 | 14 | 10 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Outline | blurred | 1.66 | 18.46 | 0.311 | 1.84 | 105.72 | 3.0 | 68 | 3.40 | 0 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Outline | noisy | 1.50 | 12.92 | 0.304 | 1.30 | 56.25 | 8.0 | 74 | 3.70 | 11 | 4 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Outline | scanned | 13.60 | 20.48 | 0.323 | 1.79 | 105.55 | 3.0 | 65 | 3.25 | 9 | 1 | – | – | – | – | – | – | 0.0 | 0.0 |
+| Flat Logo | clean | 0.07 | 1.53 | 0.065 | 0.31 | 0.27 | 3.0 | 36 | 3.51 | 47 | 11 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 |
+| Flat Logo | aliased | 0.13 | 5.87 | 0.218 | 0.65 | 0.65 | 3.0 | 31 | 1.96 | 44 | 19 | 50 | 0.0 | 0.0 | 0 | 5.8 | – | 0.0 | 0.0 |
+| Flat Logo | blurred | 0.54 | 8.33 | 0.052 | 0.62 | 0.78 | 3.0 | 28 | 1.78 | 43 | 16 | 50 | 0.0 | 0.0 | 0 | 5.8 | – | 0.0 | 0.0 |
+| Flat Logo | noisy | 0.81 | 1.77 | 0.076 | 0.39 | 0.32 | 3.5 | 44 | 2.63 | 31 | 0 | 100 | 1.0 | 0.0 | 0 | 6.9 | – | 0.5 | 0.0 |
+| Flat Logo | scanned | 1.31 | 4.15 | 21.204 | 88.50 | 0.66 | 470.5 | 2251 | 255.53 | 11 | 0 | 62 | 1658.0 | 0.0 | 0 | 58.0 | – | 413.5 | 0.2 |
 
 ## 4. Yardstick
 
@@ -258,23 +299,28 @@ Inkscape 1.4.2's Trace Bitmap, run as a black box through its `object-trace` act
 removed, its other settings as they come) on the same one-colour drawings, and its SVG output measured by
 the same code. Compare with the black-and-white presets on the same kinds of input in section 2 and 3.
 
-| inputs | variant | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
-|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
-| curved shapes | clean | 0.25 | 11.05 | 0.198 | 0.97 | 0.97 | 1.0 | 15 | 1.98 | 11 | 83 | 1.8 | – | – | – | – | 0.0 | 0.0 |
-| curved shapes | aliased | 0.38 | 20.79 | 0.192 | 0.88 | 0.88 | 1.0 | 16 | 1.88 | 14 | 50 | 1.8 | – | – | – | – | 0.0 | 0.0 |
-| curved shapes | blurred | 0.79 | 16.57 | 0.182 | 0.86 | 1.14 | 1.0 | 15 | 1.84 | 6 | 0 | 1.8 | – | – | – | – | 0.0 | 0.0 |
-| curved shapes | noisy | 2.01 | 8.14 | 0.191 | 0.93 | 0.93 | 1.0 | 17 | 2.06 | 10 | 75 | 2.8 | – | – | – | – | 0.0 | 0.0 |
-| curved shapes | scanned | 15.31 | 20.22 | 0.191 | 0.97 | 1.14 | 1.0 | 16 | 1.98 | 7 | 0 | 2.0 | – | – | – | – | 0.0 | 0.0 |
-| polygons | clean | 0.16 | 6.45 | 0.124 | 1.26 | 2.36 | 1.0 | 21 | 1.93 | 27 | 34 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| polygons | aliased | 0.35 | 18.33 | 0.150 | 1.22 | 2.35 | 1.0 | 20 | 1.81 | 20 | 28 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| polygons | blurred | 0.90 | 17.54 | 0.190 | 1.20 | 2.56 | 1.0 | 19 | 1.75 | 0 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| polygons | noisy | 1.62 | 6.05 | 0.119 | 1.22 | 2.32 | 1.0 | 22 | 2.01 | 29 | 19 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| polygons | scanned | 14.75 | 20.30 | 0.170 | 1.49 | 2.55 | 1.0 | 21 | 1.90 | 4 | 3 | 0.0 | – | – | – | – | 0.0 | 0.0 |
-| thin lines | clean | 0.44 | 6.05 | 0.109 | 0.98 | 76.81 | 1.0 | 34 | 1.72 | 2 | – | – | – | – | – | – | 0.0 | 0.0 |
-| thin lines | aliased | 0.74 | 16.37 | 0.099 | 1.17 | 55.97 | 1.0 | 22 | 1.10 | 6 | – | – | – | – | – | – | 0.0 | 0.0 |
-| thin lines | blurred | 1.72 | 18.80 | 0.254 | 0.81 | 106.00 | 1.0 | 18 | 0.90 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
-| thin lines | noisy | 1.02 | 6.25 | 0.112 | 1.00 | 37.89 | 1.0 | 25 | 1.25 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
-| thin lines | scanned | 28.94 | 46.83 | 12.147 | 43.11 | 20.79 | 1.0 | 2763 | 138.15 | 2 | – | – | – | – | – | – | 0.0 | 0.1 |
+| inputs | variant | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px |
+|:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
+| curved shapes | clean | 0.25 | 11.05 | 0.198 | 0.97 | 0.97 | 1.0 | 15 | 1.98 | 11 | 7 | 83 | 1.8 | – | – | – | – | 0.0 | 0.0 |
+| curved shapes | aliased | 0.38 | 20.79 | 0.192 | 0.88 | 0.88 | 1.0 | 16 | 1.88 | 14 | 8 | 50 | 1.8 | – | – | – | – | 0.0 | 0.0 |
+| curved shapes | blurred | 0.79 | 16.57 | 0.182 | 0.86 | 1.14 | 1.0 | 15 | 1.84 | 6 | 5 | 0 | 1.8 | – | – | – | – | 0.0 | 0.0 |
+| curved shapes | noisy | 2.01 | 8.14 | 0.191 | 0.93 | 0.93 | 1.0 | 17 | 2.06 | 10 | 0 | 75 | 2.8 | – | – | – | – | 0.0 | 0.0 |
+| curved shapes | scanned | 15.31 | 20.22 | 0.191 | 0.97 | 1.14 | 1.0 | 16 | 1.98 | 7 | 2 | 0 | 2.0 | – | – | – | – | 0.0 | 0.0 |
+| polygons | clean | 0.16 | 6.45 | 0.124 | 1.26 | 2.36 | 1.0 | 21 | 1.93 | 27 | 4 | 34 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| polygons | aliased | 0.35 | 18.33 | 0.150 | 1.22 | 2.35 | 1.0 | 20 | 1.81 | 20 | 3 | 28 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| polygons | blurred | 0.90 | 17.54 | 0.190 | 1.20 | 2.56 | 1.0 | 19 | 1.75 | 0 | 0 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| polygons | noisy | 1.62 | 6.05 | 0.119 | 1.22 | 2.32 | 1.0 | 22 | 2.01 | 29 | 4 | 19 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| polygons | scanned | 14.75 | 20.30 | 0.170 | 1.49 | 2.55 | 1.0 | 21 | 1.90 | 4 | 0 | 3 | 0.0 | – | – | – | – | 0.0 | 0.0 |
+| thin lines | clean | 0.44 | 6.05 | 0.109 | 0.98 | 76.81 | 1.0 | 34 | 1.72 | 2 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| thin lines | aliased | 0.74 | 16.37 | 0.099 | 1.17 | 55.97 | 1.0 | 22 | 1.10 | 6 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| thin lines | blurred | 1.72 | 18.80 | 0.254 | 0.81 | 106.00 | 1.0 | 18 | 0.90 | 0 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| thin lines | noisy | 1.02 | 6.25 | 0.112 | 1.00 | 37.89 | 1.0 | 25 | 1.25 | 0 | 0 | – | – | – | – | – | – | 0.0 | 0.0 |
+| thin lines | scanned | 28.94 | 46.83 | 12.147 | 43.11 | 20.79 | 1.0 | 2763 | 138.15 | 2 | 0 | – | – | – | – | – | – | 0.0 | 0.1 |
+| askew shapes | clean | 0.31 | 7.76 | 0.142 | 1.08 | 3.38 | 1.0 | 45 | 1.89 | 32 | 15 | – | – | – | – | – | – | 0.0 | 0.0 |
+| askew shapes | aliased | 0.45 | 14.06 | 0.149 | 1.14 | 1.35 | 1.0 | 47 | 1.96 | 30 | 4 | – | – | – | – | – | – | 0.0 | 0.0 |
+| askew shapes | blurred | 1.19 | 17.05 | 0.195 | 1.20 | 3.65 | 1.0 | 44 | 1.83 | 29 | 11 | – | – | – | – | – | – | 0.0 | 0.0 |
+| askew shapes | noisy | 2.03 | 6.74 | 0.116 | 0.85 | 1.04 | 1.0 | 62 | 2.58 | 37 | 7 | – | – | – | – | – | – | 0.0 | 0.0 |
+| askew shapes | scanned | 15.69 | 20.78 | 0.217 | 1.47 | 3.65 | 1.0 | 44 | 1.83 | 26 | 8 | – | – | – | – | – | – | 0.0 | 0.0 |
 
 ## 5. Cost
 
@@ -284,17 +330,19 @@ One trace at a time on this machine (all cores); memory is the peak allocated ab
 |:--|:--|--:|:--|
 | Default | photo-like | 1 | 0.04 s, 29 paths, 6701 anchors, 12 MB |
 | Default | four-colour badge | 1 | 0.02 s, 3 paths, 64 anchors, 12 MB |
-| High Fidelity Photo | photo-like | 1 | 0.21 s, 968 paths, 114383 anchors, 170 MB |
-| High Fidelity Photo | four-colour badge | 1 | 0.05 s, 6 paths, 172 anchors, 23 MB |
-| Low Fidelity Photo | photo-like | 1 | 0.11 s, 129 paths, 22929 anchors, 104 MB |
-| Low Fidelity Photo | four-colour badge | 1 | 0.05 s, 6 paths, 136 anchors, 23 MB |
-| 3 Colors | photo-like | 1 | 0.08 s, 9 paths, 3367 anchors, 18 MB |
+| Auto Color | photo-like | 1 | 0.16 s, 732 paths, 45410 anchors, 21 MB |
+| Auto Color | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
+| High Fidelity Photo | photo-like | 1 | 0.23 s, 968 paths, 114383 anchors, 168 MB |
+| High Fidelity Photo | four-colour badge | 1 | 0.06 s, 6 paths, 172 anchors, 23 MB |
+| Low Fidelity Photo | photo-like | 1 | 0.12 s, 129 paths, 22929 anchors, 105 MB |
+| Low Fidelity Photo | four-colour badge | 1 | 0.07 s, 6 paths, 136 anchors, 22 MB |
+| 3 Colors | photo-like | 1 | 0.09 s, 9 paths, 3367 anchors, 18 MB |
 | 3 Colors | four-colour badge | 1 | 0.05 s, 4 paths, 88 anchors, 13 MB |
-| 6 Colors | photo-like | 1 | 0.08 s, 78 paths, 9008 anchors, 24 MB |
+| 6 Colors | photo-like | 1 | 0.10 s, 78 paths, 9008 anchors, 23 MB |
 | 6 Colors | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
-| 16 Colors | photo-like | 1 | 0.10 s, 178 paths, 20466 anchors, 31 MB |
+| 16 Colors | photo-like | 1 | 0.11 s, 178 paths, 20466 anchors, 32 MB |
 | 16 Colors | four-colour badge | 1 | 0.05 s, 5 paths, 88 anchors, 12 MB |
-| Shades of Gray | photo-like | 1 | 0.08 s, 81 paths, 6698 anchors, 41 MB |
+| Shades of Gray | photo-like | 1 | 0.09 s, 81 paths, 6698 anchors, 46 MB |
 | Shades of Gray | four-colour badge | 1 | 0.06 s, 10 paths, 733 anchors, 34 MB |
 | Black and White Logo | photo-like | 1 | 0.04 s, 71 paths, 5047 anchors, 8 MB |
 | Black and White Logo | four-colour badge | 1 | 0.02 s, 1 paths, 47 anchors, 6 MB |
@@ -306,65 +354,77 @@ One trace at a time on this machine (all cores); memory is the peak allocated ab
 | Line Art | four-colour badge | 1 | 0.02 s, 1 paths, 38 anchors, 6 MB |
 | Technical Drawing | photo-like | 1 | 0.04 s, 221 paths, 6443 anchors, 8 MB |
 | Technical Drawing | four-colour badge | 1 | 0.02 s, 1 paths, 47 anchors, 6 MB |
-| Flat Logo | photo-like | 1 | refused after 0.09 s (not flat art), 40 MB |
+| Outline | photo-like | 1 | 0.05 s, 45 paths, 3875 anchors, 16 MB |
+| Outline | four-colour badge | 1 | 0.03 s, 1 paths, 38 anchors, 11 MB |
+| Flat Logo | photo-like | 1 | refused after 0.10 s (not flat art), 40 MB |
 | Flat Logo | four-colour badge | 1 | 0.65 s, 5 paths, 78 anchors, 146 MB |
-| Default | photo-like | 4 | 0.18 s, 48 paths, 15720 anchors, 49 MB |
+| Default | photo-like | 4 | 0.23 s, 48 paths, 15720 anchors, 49 MB |
 | Default | four-colour badge | 4 | 0.09 s, 3 paths, 72 anchors, 48 MB |
-| High Fidelity Photo | photo-like | 4 | 0.69 s, 4475 paths, 341272 anchors, 634 MB |
-| High Fidelity Photo | four-colour badge | 4 | 0.23 s, 6 paths, 200 anchors, 93 MB |
-| Low Fidelity Photo | photo-like | 4 | 0.35 s, 304 paths, 61093 anchors, 401 MB |
-| Low Fidelity Photo | four-colour badge | 4 | 0.22 s, 6 paths, 152 anchors, 94 MB |
-| 3 Colors | photo-like | 4 | 0.27 s, 20 paths, 8453 anchors, 73 MB |
-| 3 Colors | four-colour badge | 4 | 0.18 s, 4 paths, 122 anchors, 53 MB |
-| 6 Colors | photo-like | 4 | 0.26 s, 115 paths, 23128 anchors, 83 MB |
-| 6 Colors | four-colour badge | 4 | 0.18 s, 5 paths, 92 anchors, 46 MB |
-| 16 Colors | photo-like | 4 | 0.29 s, 353 paths, 52749 anchors, 109 MB |
-| 16 Colors | four-colour badge | 4 | 0.18 s, 5 paths, 96 anchors, 46 MB |
-| Shades of Gray | photo-like | 4 | 0.28 s, 138 paths, 18794 anchors, 158 MB |
-| Shades of Gray | four-colour badge | 4 | 0.26 s, 10 paths, 1265 anchors, 137 MB |
-| Black and White Logo | photo-like | 4 | 0.20 s, 208 paths, 13717 anchors, 32 MB |
-| Black and White Logo | four-colour badge | 4 | 0.08 s, 1 paths, 57 anchors, 24 MB |
-| Sketched Art | photo-like | 4 | 0.17 s, 9 paths, 5358 anchors, 32 MB |
-| Sketched Art | four-colour badge | 4 | 0.08 s, 2 paths, 196 anchors, 24 MB |
-| Silhouettes | photo-like | 4 | 0.19 s, 2 paths, 1457 anchors, 36 MB |
-| Silhouettes | four-colour badge | 4 | 0.08 s, 1 paths, 28 anchors, 24 MB |
-| Line Art | photo-like | 4 | 0.18 s, 127 paths, 11461 anchors, 32 MB |
-| Line Art | four-colour badge | 4 | 0.08 s, 1 paths, 42 anchors, 24 MB |
-| Technical Drawing | photo-like | 4 | 0.18 s, 931 paths, 21061 anchors, 32 MB |
-| Technical Drawing | four-colour badge | 4 | 0.08 s, 1 paths, 57 anchors, 24 MB |
+| Auto Color | photo-like | 4 | 0.44 s, 1469 paths, 148161 anchors, 111 MB |
+| Auto Color | four-colour badge | 4 | 0.19 s, 5 paths, 92 anchors, 47 MB |
+| High Fidelity Photo | photo-like | 4 | 0.82 s, 4475 paths, 341272 anchors, 620 MB |
+| High Fidelity Photo | four-colour badge | 4 | 0.28 s, 6 paths, 200 anchors, 96 MB |
+| Low Fidelity Photo | photo-like | 4 | 0.55 s, 304 paths, 61093 anchors, 402 MB |
+| Low Fidelity Photo | four-colour badge | 4 | 0.29 s, 6 paths, 152 anchors, 97 MB |
+| 3 Colors | photo-like | 4 | 0.40 s, 20 paths, 8453 anchors, 72 MB |
+| 3 Colors | four-colour badge | 4 | 0.23 s, 4 paths, 122 anchors, 53 MB |
+| 6 Colors | photo-like | 4 | 0.35 s, 115 paths, 23128 anchors, 100 MB |
+| 6 Colors | four-colour badge | 4 | 0.21 s, 5 paths, 92 anchors, 47 MB |
+| 16 Colors | photo-like | 4 | 0.37 s, 353 paths, 52749 anchors, 132 MB |
+| 16 Colors | four-colour badge | 4 | 0.19 s, 5 paths, 96 anchors, 46 MB |
+| Shades of Gray | photo-like | 4 | 0.29 s, 138 paths, 18794 anchors, 160 MB |
+| Shades of Gray | four-colour badge | 4 | 0.32 s, 10 paths, 1265 anchors, 137 MB |
+| Black and White Logo | photo-like | 4 | 0.25 s, 208 paths, 13717 anchors, 32 MB |
+| Black and White Logo | four-colour badge | 4 | 0.09 s, 1 paths, 57 anchors, 24 MB |
+| Sketched Art | photo-like | 4 | 0.24 s, 9 paths, 5358 anchors, 32 MB |
+| Sketched Art | four-colour badge | 4 | 0.09 s, 2 paths, 196 anchors, 24 MB |
+| Silhouettes | photo-like | 4 | 0.24 s, 2 paths, 1457 anchors, 36 MB |
+| Silhouettes | four-colour badge | 4 | 0.13 s, 1 paths, 28 anchors, 24 MB |
+| Line Art | photo-like | 4 | 0.35 s, 127 paths, 11461 anchors, 32 MB |
+| Line Art | four-colour badge | 4 | 0.14 s, 1 paths, 42 anchors, 24 MB |
+| Technical Drawing | photo-like | 4 | 0.35 s, 931 paths, 21061 anchors, 32 MB |
+| Technical Drawing | four-colour badge | 4 | 0.12 s, 1 paths, 57 anchors, 24 MB |
+| Outline | photo-like | 4 | 0.40 s, 113 paths, 10455 anchors, 64 MB |
+| Outline | four-colour badge | 4 | 0.16 s, 1 paths, 42 anchors, 44 MB |
 | Flat Logo | photo-like | 4 | refused after 0.10 s (not flat art), 40 MB |
-| Flat Logo | four-colour badge | 4 | 0.68 s, 5 paths, 69 anchors, 146 MB |
-| Default | photo-like | 16 | 1.08 s, 127 paths, 34766 anchors, 199 MB |
-| Default | four-colour badge | 16 | 0.47 s, 3 paths, 88 anchors, 184 MB |
-| High Fidelity Photo | photo-like | 16 | 3.68 s, 31125 paths, 1175671 anchors, 880 MB |
-| High Fidelity Photo | four-colour badge | 16 | 1.05 s, 6 paths, 274 anchors, 257 MB |
-| Low Fidelity Photo | photo-like | 16 | 1.78 s, 2036 paths, 181832 anchors, 754 MB |
+| Flat Logo | four-colour badge | 4 | 0.67 s, 5 paths, 69 anchors, 146 MB |
+| Default | photo-like | 16 | 1.10 s, 127 paths, 34766 anchors, 199 MB |
+| Default | four-colour badge | 16 | 0.50 s, 3 paths, 88 anchors, 184 MB |
+| Auto Color | photo-like | 16 | 1.63 s, 5391 paths, 449395 anchors, 283 MB |
+| Auto Color | four-colour badge | 16 | 0.82 s, 5 paths, 126 anchors, 184 MB |
+| High Fidelity Photo | photo-like | 16 | 3.92 s, 31125 paths, 1175671 anchors, 880 MB |
+| High Fidelity Photo | four-colour badge | 16 | 1.07 s, 6 paths, 274 anchors, 257 MB |
+| Low Fidelity Photo | photo-like | 16 | 1.80 s, 2036 paths, 181832 anchors, 754 MB |
 | Low Fidelity Photo | four-colour badge | 16 | 1.07 s, 6 paths, 187 anchors, 257 MB |
-| 3 Colors | photo-like | 16 | 1.17 s, 76 paths, 22878 anchors, 290 MB |
-| 3 Colors | four-colour badge | 16 | 0.82 s, 4 paths, 190 anchors, 205 MB |
-| 6 Colors | photo-like | 16 | 1.09 s, 470 paths, 60539 anchors, 298 MB |
-| 6 Colors | four-colour badge | 16 | 0.81 s, 5 paths, 126 anchors, 184 MB |
-| 16 Colors | photo-like | 16 | 1.09 s, 1973 paths, 145173 anchors, 303 MB |
-| 16 Colors | four-colour badge | 16 | 0.83 s, 5 paths, 128 anchors, 184 MB |
-| Shades of Gray | photo-like | 16 | 1.61 s, 686 paths, 53872 anchors, 407 MB |
-| Shades of Gray | four-colour badge | 16 | 1.35 s, 9 paths, 2216 anchors, 270 MB |
-| Black and White Logo | photo-like | 16 | 1.01 s, 1128 paths, 45117 anchors, 129 MB |
-| Black and White Logo | four-colour badge | 16 | 0.36 s, 1 paths, 69 anchors, 88 MB |
-| Sketched Art | photo-like | 16 | 0.99 s, 15 paths, 11568 anchors, 128 MB |
-| Sketched Art | four-colour badge | 16 | 0.39 s, 2 paths, 361 anchors, 88 MB |
-| Silhouettes | photo-like | 16 | 1.30 s, 3 paths, 3358 anchors, 144 MB |
-| Silhouettes | four-colour badge | 16 | 0.41 s, 1 paths, 32 anchors, 95 MB |
-| Line Art | photo-like | 16 | 0.95 s, 713 paths, 36212 anchors, 129 MB |
-| Line Art | four-colour badge | 16 | 0.34 s, 1 paths, 49 anchors, 88 MB |
-| Technical Drawing | photo-like | 16 | 1.09 s, 4578 paths, 79049 anchors, 130 MB |
+| 3 Colors | photo-like | 16 | 1.21 s, 76 paths, 22878 anchors, 290 MB |
+| 3 Colors | four-colour badge | 16 | 0.84 s, 4 paths, 190 anchors, 205 MB |
+| 6 Colors | photo-like | 16 | 1.16 s, 470 paths, 60539 anchors, 298 MB |
+| 6 Colors | four-colour badge | 16 | 0.85 s, 5 paths, 126 anchors, 184 MB |
+| 16 Colors | photo-like | 16 | 1.20 s, 1973 paths, 145173 anchors, 303 MB |
+| 16 Colors | four-colour badge | 16 | 0.91 s, 5 paths, 128 anchors, 184 MB |
+| Shades of Gray | photo-like | 16 | 1.69 s, 686 paths, 53872 anchors, 407 MB |
+| Shades of Gray | four-colour badge | 16 | 1.41 s, 9 paths, 2216 anchors, 270 MB |
+| Black and White Logo | photo-like | 16 | 1.17 s, 1128 paths, 45117 anchors, 129 MB |
+| Black and White Logo | four-colour badge | 16 | 0.44 s, 1 paths, 69 anchors, 88 MB |
+| Sketched Art | photo-like | 16 | 1.19 s, 15 paths, 11568 anchors, 128 MB |
+| Sketched Art | four-colour badge | 16 | 0.41 s, 2 paths, 361 anchors, 88 MB |
+| Silhouettes | photo-like | 16 | 1.41 s, 3 paths, 3358 anchors, 144 MB |
+| Silhouettes | four-colour badge | 16 | 0.45 s, 1 paths, 32 anchors, 95 MB |
+| Line Art | photo-like | 16 | 1.16 s, 713 paths, 36212 anchors, 129 MB |
+| Line Art | four-colour badge | 16 | 0.39 s, 1 paths, 49 anchors, 88 MB |
+| Technical Drawing | photo-like | 16 | 1.26 s, 4578 paths, 79049 anchors, 130 MB |
 | Technical Drawing | four-colour badge | 16 | 0.37 s, 1 paths, 69 anchors, 88 MB |
-| Flat Logo | photo-like | 16 | refused after 0.11 s (not flat art), 40 MB |
-| Flat Logo | four-colour badge | 16 | 0.67 s, 5 paths, 67 anchors, 146 MB |
+| Outline | photo-like | 16 | 1.29 s, 632 paths, 31715 anchors, 256 MB |
+| Outline | four-colour badge | 16 | 0.60 s, 1 paths, 49 anchors, 176 MB |
+| Flat Logo | photo-like | 16 | refused after 0.14 s (not flat art), 40 MB |
+| Flat Logo | four-colour badge | 16 | 0.87 s, 5 paths, 67 anchors, 146 MB |
 
 ## Revision history
 
 | date | change |
 |:--|:--|
+| 2026-10-13 | Snap Curves To Lines levels lines within 2.5 degrees of level or upright; askew inputs and an "upright %" column, so the baseline was measured again with them (the tracer of main at `baf9693f`) |
+| 2026-10-13 | Ignore Color; the Auto Color and Outline presets, measured from here on (Outline is the first measure of Create: Strokes) |
 | 2026-10-13 | Thin lines: black and white read against the image's darkest black and the paper near each edge |
 | 2026-10-13 | Memory: layers traced within the box of their pixels and a few at a time (16 megapixel photo: 3.9 GB to 0.9 GB) |
 | 2026-10-13 | Shared edges: outlines are cut at their junctions and each piece is fitted once, the same from either side |