bridge op• Data kinds: counts → image
• Call: fullseye.apply(img, "counts_to_img", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
*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):
▸ counts_to_img: knob a sweep (docs site)
Sweeping knob b (0.1 / 0.5 / 0.9, the other knob at its default):
▸ counts_to_img: knob b sweep (docs site)
Stages (the ops that come before → this op, left to right):
▸ counts_to_img: stages (docs site)
On other images (synthetic scene / photo / coins. Top row: inputs, bottom row: their outputs. Knobs at default):
▸ counts_to_img: other inputs (docs site)
Turns a 1-D sequence of non-negative integer counts into a bar chart and back into an image.
There was not even 1 op that can render counts into an image (there are 13 ops that produce it). The default is bars because counts are integer frequencies; joining them with a polyline makes it look as if "values in between" exist.
• a → vertical-axis padding (same formula as signal_to_img).
• b → drawing style. polyline for b < 1/3, bars (default) for < 2/3, and above that points. The order differs from signal_to_img because the default knob 0.5 is meant to give the natural drawing for that type —— for counts, bars are natural.
• Returns: (128, 128) float64.
• gallery2d_bridge 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.
img_to_counts 0.50 0.50 counts_to_img 0.50 0.50
▸ Load this pipeline · Load & run
• gallery2d_bridge — py -3.11 examples/gallery2d_bridge.py
image as input)identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter
bridge)img_to_points · img_to_keypoints · img_to_signal · img_to_projection_profile · img_to_counts · img_to_matrix · img_to_video · img_to_volume
*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.