smoothing op• Data kinds: image → image
• Call: fullseye.apply(img, "unsharp", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: emphasize (the HALCON reference is a useful guide to its meaning and parameters)
*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).*
Unsharp mask. ★It clips to [0,1] on the way out (2026-09-02).
> The detailed description below is the original text — the summary and the headings are translated.
`v + k*(v - blur)` は定義上オーバーシュートする(実測 min=-0.1499 /
max=+1.1499)。_apply は段間で同じ clip を掛けるので **パイプライン結果は
ビット不変**だが、fullseye.apply を単発で呼ぶ経路だけは生値が出ていて、
image の [0,1] 契約を破ったまま保存すると黒/白に潰れていた。GPU 側
(accel._unsharp)も同じ clip を持つ。
• gallery2d_smoothing_rank 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.
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.
unsharp 0.35 0.50
▸ Load this pipeline · Load & run
• gallery2d_smoothing_rank — py -3.11 examples/gallery2d_smoothing_rank.py
• poc_camera_shake_deblur — py -3.11 examples/poc_camera_shake_deblur.py
• poc_superresolution_limits — py -3.11 examples/poc_superresolution_limits.py
image as input)identity · gaussian · mean_box · bilateral · median · min_filter · max_filter · percentile
smoothing)gaussian · mean_box · bilateral · sk_tv · sk_wavelet · sk_rolling_ball · sk_nlm · sk_tv_bregman
*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.