gray op• Data kinds: image → image
• Call: fullseye.apply(img, "image_standardize", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• GPU: none (CPU reference implementation only)
*The figure is the actual output on a synthetic 128×128 input. Left: input, right: output. Point clouds are drawn as a top-down scatter (brightness = z), 1-D series as a line plot, volumes as the maximum-intensity projection along z, videos as the middle frame, complex images as magnitude; return values that are not pictures are shown as the values themselves.*
Sweeping knob a (0.1 / 0.5 / 0.9, the other knob at its default):
▸ image_standardize: knob a sweep (docs site)
Sweeping knob b (0.1 / 0.5 / 0.9, the other knob at its default):
▸ image_standardize: knob b sweep (docs site)
On other images (synthetic scene / photo / coins. Top row: inputs, bottom row: their outputs. Knobs at default):
▸ image_standardize: other inputs (docs site)
*The 4th column is a colour (H,W,3) input. This op handles colour without crossing channels (it does not convolve the colour channel as a third spatial axis).*
Standardises an image and maps signed deviations to an intensity image in [0,1].
> The detailed description below is the original text — the summary and the headings are translated.
a の 3 帯が zscore / robust / percentile。b はクリップ幅を 1〜6 尺度に写し、-幅 / +幅 を 0 / 1、零偏差を 0.5 にする。百分位方式は 1 / 99 % を使う。生の σ 単位は normalized_threshold.image_standardize_raw を使う。image sort が [0,1] を要求するため、登録 op は生の標準化値を返さない。
空入力は尺度を推定できないため拒否する。定数入力は全 0.5 を返す（理由: 偏差 0 を符号付き強度表現の中立点へ写すため）。
Knobs (measured): a acts in discrete steps; it switches at a ≈ 0.33、0.67 (measured on a sweep of step 0.02).
• gallery2d_gray_arith 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.
image_standardize 0.50 0.50
▸ Load this pipeline · Load & run
• gallery2d_gray_arith — py -3.11 examples/gallery2d_gray_arith.py
image as input)identity · gaussian · mean_box · mean_box_wh · bilateral · kuwahara · unsharp · median
gray)gamma · quantize_uniform · quantize_lloyd_max · quantization_error · dither_ordered · dither_floyd_steinberg · companding_mu_law · banding_map
*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.