decompose op• 데이터 종류: image2d → table
• 호출: import motionmag; motionmag.complex_steerable_decompose(image, scales: 'int' = 4, orientations: 'int' = 4) -> 'dict'(또는 opsmotionmag.get("complex_steerable_decompose"))
한 프레임의 복소 방향 선택적 서브밴드 분해 -> `dict`.
> 아래 상세 설명은 원문입니다 —— 요약과 제목은 번역되어 있습니다.
Splits the image into `scales * orientations` analytic sub-bands plus
three residuals (low-pass, high-pass and a small symmetric completion band).
Each sub-band is a full-resolution `(H, W)` complex array whose modulus is
the local contrast of that scale/orientation and whose argument is the local
phase — the quantity a translation shifts linearly, which is what the
rest of this module is built on. There is no spatial decimation: keeping
every band at full resolution costs memory but makes the frame exactly
invertible, and exactness is the point.
Returns ``{"bands": [complex (H, W), ...], "kinds": [...],
"centre_cycles_per_px": [...], "orientation_rad": [...], "shape": (H, W),
"scales": s, "orientations": k}`. kinds[j] is "band"` for an oriented
sub-band and `"lowpass" / "highpass" / "residual"` otherwise;
`centre_cycles_per_px and orientation_rad are None` for residuals,
which have no orientation and no single centre frequency.
Feed the whole dict back to :func:complex_steerable_reconstruct. Round trip
error, measured on a 64x64 random frame with the defaults, is
`max|out - in| = 6.66e-16`; on a 31x37 (odd, non-square) frame 7.22e-16;
and the worst over every `scales` in 1..8 crossed with every
`orientations` in 1..16 on 32x32 is 7.77e-16 — the tight-frame construction
is exact, not approximate (see the notes on the self-conjugate grid points
in :func:_filter_bank).
References: Freeman & Adelson, IEEE PAMI 1991; Simoncelli & Freeman,
ICIP 1995; Portilla & Simoncelli, IJCV 2000.
• motion_magnification 패밀리 가이드
• 샘플 데이터 카탈로그(DL URL / 라이선스) —— 2-D 는 skimage.data(BSD/public)+ 합성, 3-D 는 실데이터 소스(Stanford/PDS 등)의 DL URL.
• 연산자의 내력·참고문헌 —— 이 연산자 족의 바탕이 된 연구/기법의 출처.
• 알고리즘의 정전(저자·연도)과 용도는 위의 패밀리 사용 가이드에 적혀 있습니다.
• motion_magnification — py -3.11 examples/motion_magnification.py
table 를 입력으로 받는 것)decompose)*Provenance: motionmag.py — MOTIONMAG 연산자 레지스트리. 이 op 노트는 tools/opdocs.py md 가 자동 생성합니다(직접 편집하지 마세요).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.