projective_trans_region — 2D `geometry` op

• Data kinds: region → region

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

• HALCON equivalent: projective_trans_region (the HALCON reference is a useful guide to its meaning and parameters)

Usage

> This operator's description has not been translated yet. The original text follows as it is.

`projective_trans_image` と同じ台形歪みを領域(2 値マスク)に適用する。

`out_sort が region のため build() が _rebinarise` で包み、

補間で生じた小数値を `>0.5` で二値に戻してから返す(領域の {0,1} 契約を

壊さないための後処理)。HALCON の `projective_trans_region`（Apply a

projective transformation to a region.）に相当。

`a が歪みの強さ、b` が非対称さを振る。両方が使われる。

Detailed usage guide

• gallery2d_geometry 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_geometry — py -3.11 examples/gallery2d_geometry.py

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

identity · reg_erode · reg_dilate · reg_open · reg_close · fill_holes · select_largest · remove_small

Same category (`geometry`)

rotate_img · rescale_img · affine_warp · sk_swirl · mirror_image · transpose_region · rotate_image · zoom_image_factor

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

projective_trans_region — 2D geometry op