complex_steerable_decompose — MOTIONMAG `decompose` op

• 資料種類:image2d → table

• 呼叫:import motionmag; motionmag.complex_steerable_decompose(image, scales: 'int' = 4, orientations: 'int' = 4) -> 'dict'(或 opsmotionmag.get("complex_steerable_decompose"))

用法

單影格的複數方向選擇子帶分解 -> `dict`。

> 以下的詳細說明為原文 —— 摘要與標題已翻譯。

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.

詳細使用指南

• motion_magnification 族使用指南

參考(範例資料・文獻)

• 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。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• motion_magnification — py -3.11 examples/motion_magnification.py

型別可銜接的下一個運算子(可接受 `table` 作為輸入)

complex_steerable_reconstruct

同類別(`decompose`)

complex_steerable_reconstruct

*Provenance: motionmag.py — MOTIONMAG 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*

complex_steerable_decompose — MOTIONMAG decompose op

用法