typed opcimage → cimagefullseye.apply(img, "tb_cx_apply_transfer_function", a=0.5, b=0.5) (2-D は 1 画像 + 2 スカラつまみ a,b∈[0,1] のモデル)
図は合成の入力 128×128 で実際に走らせた出力。左が入力、右が出力。点群は上から見た散布(明るさ = z)、1-D 列は折れ線、体積は z 方向の最大値投影、動画は中央フレーム、複素画像は振幅、絵にならない返り値は値そのもの。
つまみ a を振る(0.1 / 0.5 / 0.9、もう一方は既定):

つまみ b は出力を変えない(実測: 0.1 / 0.5 / 0.9 で同一)。
段階(前置きの op → この op。左から順):

別の画像でも(合成シーン / 写真 / 硬貨。上段が入力、下段がその出力。つまみは既定):

Multiply a centred spectrum by a filter H -> (H, W) complex128.
The honest primitive under ops.lowpass / ops.highpass, but
complex-preserving: the filtered spectrum is returned as a complex field
(not immediately inverted and real-cast), so it can be chained, inspected, or
handed to :func:cx_ifft. H is a same-shape transfer function laid out in
the centred convention of :func:cx_fft (DC at the centre); it may be real
(a magnitude mask) or complex (a phase-shifting filter). A real cx is
FFT’d first (module convenience).
Typed bridge of the 2d op cx_apply_transfer_function into the 2-D evolution registry: the same implementation, called under the op(v, a, b) convention. a sets the width of the transfer function H, which the bridge builds per call at the spectrum’s own shape: a centred Gaussian low-pass H = exp(-r^2 / (2 sigma^2)) with sigma = 0.02 + 0.48 a cycles/pixel (0.26 at a=0.5). b is unused. (Until 2026-10-07 H was bound once as a fixed 32x32 array, so every other image size was refused.)
下のプログラムは実際に走ることを確かめてある(図と同じ入力)。Studio のヘルプではこのブロックがボタンになり、その場で読み込んで実行できる。
img_to_cimage 0.50 0.50
tb_cx_apply_transfer_function 0.50 0.50
py -3.11 examples/gallery_spectrum_signal_bridge.pycimage を入力に取れる)identity · tb_cx_ifft · tb_cx_magnitude · tb_cx_phase · tb_cx_real · tb_cx_imag · tb_cx_log_magnitude · tb_cplx_cr_residual
typed)tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_project_points · tb_render_point_depth · tb_points_render · tb_statistical_outlier_removal · tb_radius_outlier_removal
Provenance: ops.py — 2D operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.