edges op• Data kinds: image → image
• Call: fullseye.apply(img, "corner_response", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: points_harris (the HALCON reference is a useful guide to its meaning and parameters)
Returns the Harris corner detection response (corner-likeness) as an image. Equivalent to HALCON's `points_harris` (Detect points of interest using the Harris operator.).
> The detailed description below is the original text — the summary and the headings are translated.
`a が構造テンソルを平滑化するガウシアンの σ を 0.5〜2.5 に振る。b は未使用（Harris の経験定数 k=0.04 は固定）。Sobel 勾配 Gx, Gy から構造テンソル成分 Gx², Gy², Gx*Gy をガウシアンで平滑化し、det - k*trace² を _signed01 で [0,1] に写す（0.5 が応答ゼロ、大きいほどコーナーらしく、小さいほどエッジらしい）。座標リストではなく応答マップを返す点が HALCON の points_harris（座標を返す）と異なる——極大点抽出は別途 _local_max` 等と組み合わせる必要がある。
• gallery2d_edges 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_edges — py -3.11 examples/gallery2d_edges.py
image as input)identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter
edges)sobel_mag · prewitt_mag · roberts_mag · dog · grad_dir · log · sk_scharr · sk_farid
*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.