segment op• Data kinds: image → region
• Call: fullseye.apply(img, "sg_felzenszwalb", 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).*
Returns the boundaries of Felzenszwalb's graph-based region segmentation (`skimage.segmentation.felzenszwalb`; no corresponding HALCON operator).
> The detailed description below is the original text — the summary and the headings are translated.
`a はクラスタの粗さを決める scale を 40〜540 に振り（大きいほど大きな塊にまとまる）、b は最小成分サイズを 15〜100 に振る（min_size = round(15+b*85)`）。戻り値はラベル画像の外側境界（region）で、真の物体輪郭に沿いやすい。
• gallery2d_segmentation 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.
sg_felzenszwalb 0.50 0.50
▸ Load this pipeline · Load & run
• gallery2d_segmentation — py -3.11 examples/gallery2d_segmentation.py
region as input)identity · reg_erode · reg_dilate · reg_open · reg_close · fill_holes · select_largest · remove_small
segment)sg_slic_superpixels · sg_gmm_segment · sg_kmeans_intensity · sg_region_growing_seeded · sg_normalized_cut_2 · sg_watershed_gradient
*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.