mirror_region — 2D `geometry` op

• Data kinds: region → region

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

• HALCON equivalent: mirror_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.

領域を反転（ミラー）する。a の値で軸を切り替える: a<0.34 で上下反転（`flipud）、0.34≤a<0.67 で左右反転（fliplr）、それ以外で転置（対角線反転、x.T）。b は未使用。フリップは値を変えない演算なので _rebinarise` は実質何もしない。

HALCON の `mirror_region`（軸を指定して領域を反射する演算）に相当。HALCON は軸位置を任意に指定できるが、この実装は画像中心を通る 3 種類の軸（縦/横/対角）に固定されている近似。

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).*

mirror_region — 2D geometry op