LR-PROF-CAMERACOLOR: docs: describe the validation photos neutrally

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

docs/camera-preview-colour.md

@@ -30,7 +30,7 @@ Synthetic tests cover colour with a nonlinear camera tone, preserved scene-linea
 
 Five local Sony ILCE-6700 ARWs were accepted. Held-out per-channel linear-display RMS values were 0.04244, 0.03349, 0.04552, 0.02871 and 0.03100. All five unedited supplied JPEG exports stayed pixel-identical to the installed pre-change renderer at equal size/quality. Four supplied JPEGs use Display P3 and two have a narrower crop than the RAW, so they are visual references rather than aligned pixel ground truth.
 
-Public CC0 samples (raw.pixls.us; 10 files, ILCE-6000, -6400 ×2, -6700, -7M3, -7M4 ×2, -7RM4, -7SM3, DSC-RX100M3), rendered at 1200 px and compared with each file's embedded JPEG (mean CIE76 ΔE at 200 px): 7 fits accepted, ΔE 17–26 → 3–10 with matching mean lightness. (The RX100M3 was rejected at the time because the decoder read neither its white balance nor its black level and its render was green; since issue #148 its fit is accepted, held-out RMS 0.153 → 0.087.) Rejected and unchanged: an ILCE-7RM4 dusk scene whose fit was worse than the fallback (ΔE 7.6), and a reduced-size lossless ARW (no fit attempted). Saturated hues can still differ (an orange-red hull renders yellow). With the hue/saturation table, 28 local ILCE-7M4 ARWs (a month of family photos, one in 24 picked) went from mean ΔE 4.74 to 4.27 against their camera JPEGs (200 px, CIE76); 27 accepted a table, none got worse overall by more than 0.1, and a few saturated regions moved away (12.4 → 15.2 on one). The lime shirt's hue error dropped from 16° to 6–8°. With the value axis, the chroma curve and gamma-domain selection, the same set plus the shirt photo (29 files) went from mean ΔE 4.23 to 3.54 (4.74 before the table), every file closer than before, saturated areas 7.65 → 6.41; all 29 now use a table. A small object stays hard: in a second shot of the lime shirt only 7 of the 6144 proxy pixels show it, so the table can't learn its colour and the shirt still renders yellower than the JPEG.
+Public CC0 samples (raw.pixls.us; 10 files, ILCE-6000, -6400 ×2, -6700, -7M3, -7M4 ×2, -7RM4, -7SM3, DSC-RX100M3), rendered at 1200 px and compared with each file's embedded JPEG (mean CIE76 ΔE at 200 px): 7 fits accepted, ΔE 17–26 → 3–10 with matching mean lightness. (The RX100M3 was rejected at the time because the decoder read neither its white balance nor its black level and its render was green; since issue #148 its fit is accepted, held-out RMS 0.153 → 0.087.) Rejected and unchanged: an ILCE-7RM4 dusk scene whose fit was worse than the fallback (ΔE 7.6), and a reduced-size lossless ARW (no fit attempted). Saturated hues can still differ (an orange-red hull renders yellow). With the hue/saturation table, 28 local ILCE-7M4 ARWs (one month of photos, one in 24 picked) went from mean ΔE 4.74 to 4.27 against their camera JPEGs (200 px, CIE76); 27 accepted a table, none got worse overall by more than 0.1, and a few saturated regions moved away (12.4 → 15.2 on one). The lime shirt's hue error dropped from 16° to 6–8°. With the value axis, the chroma curve and gamma-domain selection, the same set plus the shirt photo (29 files) went from mean ΔE 4.23 to 3.54 (4.74 before the table), every file closer than before, saturated areas 7.65 → 6.41; all 29 now use a table. A small object stays hard: in a second shot of the lime shirt only 7 of the 6144 proxy pixels show it, so the table can't learn its colour and the shirt still renders yellower than the JPEG.
 
 On one sample, Exposure +1 EV, Saturation +100, Contrast +50, warm/cool WB, tint, highlights and shadows all changed the output. The same matrix and curve were selected for 400-pixel and full-resolution renders. Headless UI checks wait until the loupe reports `source: render` and no jobs remain; the camera JPEG stand-in does not count as verification.