sk_hessian_det — 2D `edges` op

• Data kinds: image → image

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

Usage

Blob detection response via the Hessian determinant. The determinant of the second-derivative matrix (Hessian) is a signed response that is positive for blob-like structures and negative for saddle-like structures.

> The detailed description below is the original text — the summary and the headings are translated.

HALCON に直接対応するものは無い。実装は `feature.hessian_matrix_det(v, sigma=0.5+2.5*a) を signed01 で [0,1]` へ写した値(符号を保つため 0.5 が「応答ゼロ」に対応)—— a はスケール σ を 0.5〜3.0 に振る。b は未使用。

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.

Runnable examples (verified samples that actually call this op)

• gallery2d_edges — py -3.11 examples/gallery2d_edges.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 · corner_response · sk_scharr

*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

sk_hessian_det — 2D edges op