smk-playground/docs/FEATURE_EXAMPLES.md

Feature examples

Values below are deterministic outputs from extractor v1. OKLCH tuples are (L, C, hue°); null hue means chroma below 1e-7.

KMS8892 — required corpus example with physical dimensions

• Source/analytical palette: 7 / 7 colours, uniform weight 1/7.
• OKLCH: #908d41 (0.6297, 0.0986, 106.85), #fff1dc (0.9637, 0.0315, 78.17), #aed7ea (0.8561, 0.0505, 227.77), #ceeae5 (0.9152, 0.0302, 183.74), #b7ac3e (0.7331, 0.1295, 103.59), #888888 (0.6268, ~0, null), and #795025 (0.4679, 0.0801, 64.80).
• Centroid OKLab: (0.7418, -0.0118, 0.0406); OKLCH: (0.7418, 0.0423, 106.18°).
• Spread 0.1654; hue concentration 0.7040.
• SMK visual: brightness 7.1344, contrast 2.9756, saturation 2.0800, entropy 9.6865, colortemp 3.3317.
• Netto 78 × 51.5 cm; area 4,017 cm²; physical/image aspect mismatch 0.000048.
• Flags: IMAGE_BUNDLE_OK.

KKS8001 — required duplicate-colour QA example, outside corpus

• Source palette: #F4C6A3, #F4C6A3, #9B9B9B, #9B9B9B, #9B9B9B.
• Analytical palette: #f4c6a3 (0.8583, 0.0702, 58.91°) and #9b9b9b (0.6895, ~0, null), each with uniform analytical weight 0.5.
• Centroid OKLab: (0.7739, 0.0181, 0.0301); OKLCH: (0.7739, 0.0351, 58.91°).
• Spread 0.0914; hue concentration 1.0.
• Source visual and geometry are unavailable.
• Flags include PALETTE_DUPLICATE_SOURCE_COLOR, IMAGE_BUNDLE_INCOMPLETE, VISUAL_FIELDS_PARTIAL, and PHYSICAL_GEOMETRY_MISSING.
• It is not added to either corpus feature Parquet.

KMS1571 — near-achromatic

• Palette: #111111, #222222; both have null hue.
• Centroid OKLCH: (0.2148, ~0, null).
• Spread 0.0372; hue concentration null.
• Netto 66 × 40.5 cm.
• Flags: PALETTE_ACHROMATIC, CENTROID_ACHROMATIC, HUE_CONCENTRATION_UNAVAILABLE.

KAS782 — colourful/high-spread deterministic sample

• Palette: #b97438, #b7ac3e, #000000, #33140c, #fcaa6b, uniform weight 0.2.
• Chromatic hues cluster around orange/yellow (35.54°–103.59°); black has null hue.
• Centroid OKLCH: (0.4793, 0.0772, 68.93°).
• Spread 0.2953; hue concentration 0.9149.
• SMK saturation 4.7511 and brightness 3.7184.
• Physical geometry is unavailable; the image is 1080 × 1080 px.

KKS5261 — corpus example without Netto geometry

• Palette: #b7ac3e, #956830, #77733d, #ffffff.
• Centroid OKLCH: (0.7081, 0.0714, 93.52°).
• Spread 0.1721; hue concentration 0.9618.
• Image 4,992 × 6,287 px; physical Netto geometry remains null rather than substituting sheet measurements or pixels.
• Flags include PHYSICAL_GEOMETRY_MISSING.