region op• Data kinds: region → region
• Call: fullseye.apply(img, "dilation_seq", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: dilation_seq (the HALCON reference is a useful guide to its meaning and parameters)
Sequential dilation using a fixed cross-shaped structuring element (4-connectivity), repeated 1-4 times depending on a. b is unused.
> The detailed description below is the original text — the summary and the headings are translated.
HALCON の `dilation_seq`(構造要素を繰り返し適用して逐次的に膨張する演算)に相当する近似。円形やユーザー定義の構造要素ではなく scipy 既定の十字形要素を使う点が簡略化されている。
• 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.