delta_e_76 — IMGMETRICS `colordiff` op

• Data kinds: lab × lab → image2d

• Call: import imgmetrics; imgmetrics.delta_e_76(lab1, lab2) (or opsimgmetrics.get("delta_e_76"))

Usage

CIE76 colour difference — the Euclidean distance in Lab space.

> The detailed description below is the original text — the summary and the headings are translated.

単純だが知覚と合わない(特に彩度の高い青)ので、比較の基準としてのみ

置いてある。実用は :func:delta_e_2000。

Detailed usage guide

• image_difference_metrics family guide

Background guides (the physics and conventions behind this op)

• colorimetry — 測色と分光の知識 — 色は「分光 × 光源 × 観測者」でしか決まらない

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• image_quality_metrics — py -3.11 examples/image_quality_metrics.py

Ops the type connects to (they accept `image2d` as input)

mse · rmse · psnr · ssim · ms_ssim · ssim_map · image_entropy · joint_entropy

Same category (`colordiff`)

delta_e_2000 · delta_e_map

*Provenance: imgmetrics.py — IMGMETRICS operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

delta_e_76 — IMGMETRICS colordiff op