region op• Data kinds: region → region
• Call: fullseye.apply(img, "r2_endpoints_skeleton", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
*The figure is the real output on a synthetic 128×128 input. Left: input, right: output (a non-image return value is shown as the value itself).*
Extract the end points of a skeleton (the points with exactly one skeleton pixel in their 8-neighbourhood).
> The detailed description below is the original text — the summary and the headings are translated.
HALCON の junctions_skeleton は EndPoints と JuncPoints の両方を返すが、
fullseye の junctions_skeleton は分岐点のみなので、端点側をこの op が担う。
入力が骨格でない場合は em_skeleton で細線化してから端点を取る。
孤立 1 画素(近傍 0)も端点に数える。つまみ 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.
The program below has been verified to run (same input as the figure). In Studio's help this block becomes buttons that load and run it on the spot.
threshold 0.50 0.50 r2_endpoints_skeleton 0.50 0.50
▸ Load this pipeline · Load & run
• 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.