rotate_image — 2D geometry op

Data kinds: imageimage

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

HALCON equivalent: rotate_image (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.

画像を中心を軸に `-45°〜+45°(a` で決まる)回転する

(`scipy.ndimage.rotatereshape=False` でキャンバスサイズを維持)。

枠外にはみ出す部分は反射(`mode="reflect"`)で埋めるため、四隅には元画像が

折り返して写り込む(帳票の傾き補正のように「枠外を背景色で埋めたい」用途

にはそのままでは向かない、既知の設計上の制約)。HALCON の

`rotate_image`(Rotate an image about its center.)に相当。

`a が回転角を -45°〜+45° の範囲で振る。b` は未使用。

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_geometrypy -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 · zoom_image_factor · zoom_image_size


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

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.