How to obtain a curvelet transform matrix?
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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
on 19 Mar 2024
Hello, may I share your code after adjusting the parameters?I also want to get the Qubo transform matrix
Accepted Answer
Matt J
on 3 Oct 2017
This FEX submission might help you,
9 Comments
Matt J
on 4 Oct 2017
Edited: Matt J
on 4 Oct 2017
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.
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