gray op• Data kinds: image → image
• Call: fullseye.apply(img, "bit_not", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: bit_not (the HALCON reference is a useful guide to its meaning and parameters)
Tone inversion (negative/positive inversion). Implemented as `1 - x` (inversion as a continuous value in [0,1]); a and b are unused.
> The detailed description below is the original text — the summary and the headings are translated.
HALCON の `bit_not`(画素の全ビットを反転するビット単位演算)とは動作原理が異なる近似 —— 8bit 整数のビット補数ではなく浮動小数の線形反転なので、量子化された画像でのビットパターンは再現しない。明るい/暗いを単純に入れ替えたい用途には使える。
• 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 · scale_clip · equalize · sigmoid · clahe · sk_adapthist · sk_enhance_contrast
*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.