bridge op• Data kinds: image → cimage
• Call: fullseye.apply(img, "img_to_cimage", 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):
▸ img_to_cimage: knob a sweep (docs site)
Sweeping knob b (0.1 / 0.5 / 0.9, the other knob at its default):
▸ img_to_cimage: knob b sweep (docs site)
On other images (synthetic scene / photo / coins. Top row: inputs, bottom row: their outputs. Knobs at default):
▸ img_to_cimage: 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).*
Use the image as amplitude and a phase from pixel value plus tilt to build a complex field (H,W) complex128.
> The detailed description below is the original text — the summary and the headings are translated.
`field = img * exp(i * (2π * a * img + 2π * (b - 0.5) * 8 * x / W))`。
振幅 = 画素値(透過率・開口として読む)、位相は 値に比例する成分(位相物体
としての厚み)と x 方向の線形な傾き(平面波の入射角)の和。角スペクトル法
`tb_angular_spectrum_propagate や tb_cx_*` の族が受ける複素画像の合成器。
• `a → 位相の深さ 2π * a * img`(a=0 で実場、a=0.5 で最大 π)。
• `b → 傾き。(b - 0.5) * 8` 周期ぶんの線形位相を x 方向に掛ける
(b=0.5 で傾き 0。8 は「128 px で 8 縞」の目安)。
• 返り値: `(H, W) complex128。|field| = img、arg` は上式。
• 値 0 の画素は位相が定義できない(`0 * exp(iφ) = 0`)。
• 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_cimage 0.50 0.50
▸ Load this pipeline · Load & run
• gallery2d_bridge — py -3.11 examples/gallery2d_bridge.py
cimage as input)identity · tb_cx_ifft · tb_cx_magnitude · tb_cx_phase · tb_cx_real · tb_cx_imag · tb_cx_log_magnitude · tb_cx_apply_transfer_function
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.