geometry op• Data kinds: image → image
• Call: fullseye.apply(img, "zoom_image_size", 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_size (the HALCON reference is a useful guide to its meaning and parameters)
A zoom that resamples to a target size (height `H*(0.5+a), width W*(0.5+b)). Whereas zoom_image_factor takes two scale factors, this one specifies the **size** itself independently for height and width -- a different semantics from HALCON's. However, since this pipeline's image contract requires "returned at the same canvas size as the input," the resampled result is placed at the top-left of a canvas at the original resolution, padded with 0, and any overflow is cropped (the image visibly appears shrunk/enlarged, but the array's shape itself does not change). Corresponds to HALCON's zoom_image_size` (Zoom an image to a given size).
> The detailed description below is the original text — the summary and the headings are translated.
`a が目標高さの比率、b` が目標幅の比率を振る。両方が使われる。
• gallery2d_geometry family guide
• 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.
• gallery2d_geometry — py -3.11 examples/gallery2d_geometry.py
image as input)identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter
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).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.