zoom_region — 2D `geometry` op

• Data kinds: region → region

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

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

Usage

Zooms the region isotropically (same scale on both axes). Scales it about the center by a factor `s = 0.7+0.6a (0.7x to 1.3x), fills out-of-bounds areas by reflection, then converts back to a binary region via _rebinarise` with a 0.5 threshold. b is unused.

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

HALCON の `zoom_region（領域を指定倍率でズームする演算）に相当する近似。縦横独立の倍率を持つ zoom_image_factor` とは異なり単一倍率のみ。

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).*

zoom_region — 2D geometry op