mirror_image — 2D geometry op

Data kinds: imageimage

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

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

mirror_image: 入力 → 出力

*The figure is the real output on a synthetic 128×128 input. Left: input, right: output (a non-image return value is shown as the value itself).*

Usage

Switches between three types of mirroring based on the value of `a (a<0.34: vertical flip, a<0.67: horizontal flip, otherwise: transpose). Note that this is a discrete mode selection rather than a continuous mirroring transformation. Corresponds to HALCON's mirror_image (Mirror an image) -- HALCON selects vertical/horizontal/diagonal via an explicit mode argument, whereas this is an approximation that pseudo-selects based on the value range of a`.

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

`a が鏡映モードを 3 段階で選ぶ。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.

Try it in Studio

The program below has been verified to run (same input as the figure). In Studio's help this block becomes buttons that load and run it on the spot.

mirror_image 0.50 0.50

▸ Load this pipeline  ·  Load & run

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 · transpose_region · rotate_image · 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.