gray op• Data kinds: image → image
• Call: fullseye.apply(img, "scale_clip", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: scale_image (the HALCON reference is a useful guide to its meaning and parameters)
Linear tone transformation via gain and offset. Equivalent to HALCON's `scale_image` (Scale the gray values of an image.).
> The detailed description below is the original text — the summary and the headings are translated.
`a がゲイン(コントラスト)を 0.5〜2.0 倍に、b がオフセット(明るさ)を -0.5〜+0.5 に振る(clip(gain*v + offset, 0, 1))。b=0.5` がオフセット 0(変化なし)に対応する点に注意。
• gallery2d_gray_arith family guide
• 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.
• gallery2d_gray_arith — py -3.11 examples/gallery2d_gray_arith.py
image as input)identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter
gray)gamma · invert · equalize · sigmoid · clahe · sk_adapthist · sk_enhance_contrast · sk_autolevel
*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.