How to obtain a curvelet transform matrix?

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Mrin San 2017-10-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/359433-how-to-obtain-a-curvelet-transform-matrix

评论：晓珍李 2024-3-19

I want to obtain a matrix C in matlab which is the n-by-n DCT (discrete curvelet transform) matrix such that for a given set of signals X and given set of coefficients A (I supposedly think which will better represent edges of X ) we can get a representation X=C*A. C will be a universal transform matrix like an n-Haar transform matrix. Can I obtain such a matrix since curvelet is linear? I have curvelab 2.1.3 installed and a function fdct_usfft.m returns curvelet transform of a given input. But I need the curvelet transform to be a transform operator matrix rather than as an operator on a signal.

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晓珍李 2024-3-19

Hello, may I share your code after adjusting the parameters?I also want to get the Qubo transform matrix

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采纳的回答

Matt J 2017-10-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/359433-how-to-obtain-a-curvelet-transform-matrix#answer_284063

This FEX submission might help you,

http://www.mathworks.com/matlabcentral/fileexchange/44669-func2mat--convert-linear-function-to-matrix

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Mrin San 2017-10-4

Thanks a lot Sir. Trying to tweak its parameters out to get the right matrix out of it.

Matt J 2017-10-4

编辑：Matt J 2017-10-4

where x is a 512*512 array of real data or complex data (i checked both)

Note as well that if the matrix is intended to represent a 2D separable transform, it can be more efficient to compute the 1D transform matrix instead, and combine them using this FEX submission.

See here for a related example.

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