motion op• データ種: video → pairs
• 呼び出し: import quatimage; quatimage.riesz_displacement_series(video, f_lo, f_hi, fps, scales: 'int' = 4) -> 'np.ndarray' (または opsquat.get("riesz_displacement_series"))
モノジェニック位相からのフレーム全体の変位波形。→ (T, 2)。
> 以下の詳細説明は原文のままです —— 要約と見出しは訳出済み。
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.
• quaternion_monogenic ファミリ ガイド
• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。
• quaternion_monogenic — py -3.11 examples/quaternion_monogenic.py
pairs を入力に取れる)—
motion)riesz_motion_magnify · riesz_displacement
*Provenance: quatimage.py — QUAT 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.