smoothing op• Data kinds: image → image
• Call: fullseye.apply(img, "bilateral", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: bilateral_filter (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).*
Edge-preserving smoothing (bilateral filter). Equivalent to HALCON's `bilateral_filter` (bilateral filtering of an image.).
> The detailed description below is the original text — the summary and the headings are translated.
`a が空間方向の広がり σ_s = 1.0 + 3.0a を、b が明るさ方向の許容差 σ_r = 0.05 + 0.4b を振る。近傍窓は半径 r=2（5×5）固定で a では変わらない。近傍の重みは exp(-距離²/2σ_s²) × exp(-明度差²/2σ_r²)` の積で、明度差が大きい（=エッジをまたぐ）画素は重みが小さくなるため、平滑化しつつ輪郭を保てる。窓内を Python の二重ループで回すため他の平滑化 op より遅い。
• 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.
bilateral 0.35 0.50
▸ Load this pipeline · Load & run
• gallery2d_smoothing_rank — py -3.11 examples/gallery2d_smoothing_rank.py
• quickstart — py -3.11 examples/quickstart.py
image as input)identity · gaussian · mean_box · unsharp · median · min_filter · max_filter · percentile
smoothing)gaussian · mean_box · unsharp · 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.