erosion_circle — 2D `region` op

• Data kinds: region → region

• Call: fullseye.apply(img, "erosion_circle", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

• HALCON equivalent: erosion_circle (the HALCON reference is a useful guide to its meaning and parameters)

Usage

> This operator's description has not been translated yet. The original text follows as it is.

円盤形構造要素による二値収縮(`ndimage.binary_erosion`)。前景領域を

外周から侵食して縮める、最も基本的な二値モルフォロジー演算。HALCON の

`erosion_circle`（Erode a region with a circular structuring element.）

に相当。

`a が構造要素の半径を 1〜4 の範囲(_rad(a))で振る。b` はこの

バックエンドの二値モルフォロジー op(erosion/dilation/opening/closing の

円形・矩形いずれも)に共通して未使用。

Detailed usage guide

• gallery2d_region family guide

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)

• gallery2d_region — py -3.11 examples/gallery2d_region.py

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

identity · reg_erode · reg_dilate · reg_open · reg_close · fill_holes · select_largest · remove_small

Same category (`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).*

erosion_circle — 2D region op