corner_response — 2D `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)

corner_response: 入力 → 出力

*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).*

Usage

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。

Detailed usage guide

• gallery2d_edges 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.

Try it in Studio

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.

corner_response 0.40 0.50

▸ Load this pipeline · Load & run

Runnable examples (verified samples that actually call this op)

• gallery2d_edges — py -3.11 examples/gallery2d_edges.py

• poc_document_scan — py -3.11 examples/poc_document_scan.py

• poc_matrix_code_reading — py -3.11 examples/poc_matrix_code_reading.py

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

identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter

Same category (`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).*

corner_response — 2D edges op