temporal opvideo → videoimport fullseye as fs; fs.ledger.temporal_bandpass(video, f_lo, f_hi, fps) -> 'np.ndarray' (実装を直接呼ぶなら import motionmag; motionmag.temporal_bandpass(video, f_lo, f_hi, fps) -> 'np.ndarray'、台帳から引くなら opsmotionmag.get("temporal_bandpass"))Ideal temporal band-pass of every pixel’s time series -> (T, H, W).
Each pixel is transformed along time, every DFT bin whose frequency lies
outside [f_lo, f_hi] (in Hz, magnitude, DC always excluded) is zeroed,
and the result is transformed back. Frequency-selective where
videops.moving_average and videops.spatiotemporal_gaussian are
low-pass; this is the filter isolating “what is happening at 4 Hz”.
Exact for a component sitting on a bin: with T frames at fps, a
sinusoid at k*fps/T Hz passes with gain 1 and everything else in the band
passes untouched. Measured on a bin-centred 4 Hz unit sinusoid in a 64-frame
32 fps clip that also carries a DC offset of 0.5 and a 12 Hz component of
amplitude 0.3, the recovered waveform matches the 4 Hz term alone to
max|err| = 4.36e-15.
A brick-wall filter rings in time; that is the price of an exact pass-band and it is the same choice the 2012 Eulerian magnification paper makes. The output is zero-mean along time by construction.
py -3.11 examples/motion_magnification.pypy -3.11 examples/poc_beam_modal_video.pypy -3.11 examples/poc_motion_magnification.pyvideo を入力に取れる)temporal_band_power · band_snr · motion_magnify · phase_displacement · displacement_series
temporal)temporal_band_power · band_snr
Provenance: motionmag.py — MOTIONMAG 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.