motion op• 資料種類:video → pairs
• 呼叫:import quatimage; quatimage.riesz_displacement_series(video, f_lo, f_hi, fps, scales: 'int' = 4) -> 'np.ndarray'(或 opsquat.get("riesz_displacement_series"))
由單演相位得到的整影格位移波形。→ (T, 2)。
> 以下的詳細說明為原文 —— 摘要與標題已翻譯。
The contrast-weighted spatial mean of :func:riesz_displacement: the
rigid-body motion of the scene in pixels, one `(dx, dy)` row per frame.
The `(n, 2) layout is the shared 1-D convention (dsp.spectrum`,
`funct1d, opsoptics`'s MTF curves), so the trace can be handed to
`dsp.spectrum` to read off a resonant frequency without any repacking.
Weights are the `|z|^2` contrast the field solve uses, restricted to the
pixels marked `valid`, so blank regions do not drag the average towards
zero. A clip with no valid pixel anywhere (a constant image) returns exact
zeros rather than dividing by zero.
Accuracy, the `J0` cliff and the multi-orientation failure all inherit from
:func:riesz_displacement — read its head-to-head table before trusting a
number from here. On a single-grating 64x64x64 / 8 px / 4 Hz clip a true
0.5 px amplitude is recovered as 0.50000000000000 px (2.2e-16 relative);
on the two-grating `motionmag.synthesize_translation` default the same
0.5 px comes back 13.0 % low, with nothing to signal it.
• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。
• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。
• 演算法的正典(作者・年份)與用途見上面的族使用指南。
• quaternion_monogenic — py -3.11 examples/quaternion_monogenic.py
pairs 作為輸入)—
motion)riesz_motion_magnify · riesz_displacement
*Provenance: quatimage.py — QUAT 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.