zoom_image_factor — 2D `geometry` op

• Data kinds: image → image

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

• HALCON equivalent: zoom_image_factor (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.

高さ方向・幅方向で独立な倍率(`0.7+0.6*a, 0.7+0.6*b`)を持つ等方

でないズーム。中心を基準にアフィン変換で拡大縮小し、キャンバスサイズは

変えない(はみ出す/余る部分は反射で埋める)。HALCON の

`zoom_image_factor`（Zoom an image by a given factor.）に相当し、

HALCON と同じく 2 つの倍率(ScaleHeight/ScaleWidth)を取る。

`a が縦方向の倍率、b` が横方向の倍率を振る。両方が使われる

(2026-09-02 以前は `zoom_image_size` と実装が重複していたが、現在は

別の `kind` に分離済み)。

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 `image` as input)

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

Same category (`geometry`)

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

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

zoom_image_factor — 2D geometry op