region op• Data kinds: region → region
• Call: fullseye.apply(img, "sk_skeleton", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: skeleton (the HALCON reference is a useful guide to its meaning and parameters)
Region skeletonization. Thins the foreground region down to lines one pixel wide while preserving its topology (connectivity and number of holes).
> The detailed description below is the original text — the summary and the headings are translated.
HALCON の skeleton(Compute the skeleton of a region.)に相当(近似。アルゴリズムは Zhang-Suen 系)。実装は `morphology.skeletonize(binm(v)) —— 入力はまず binm`(> 0.5 のしきい値)で真偽値化される。a, b は未使用。
• gallery2d_region 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_region — py -3.11 examples/gallery2d_region.py
region as input)identity · reg_erode · reg_dilate · reg_open · reg_close · fill_holes · select_largest · remove_small
region)reg_erode · reg_dilate · reg_open · reg_close · fill_holes · select_largest · remove_small · invert_region
*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.