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.
The problem is - I want to obtain a curvelet transform matrix with size n*n which when multiplied with a n*n signal matrix shall give me a n*n curvelet coefficient matrix in matlab or in theory. With this I want to build a dictionary of representations. For example we can obtain such a matrix in matlab for discreet cosine transform using command y=dctmtx(n) where n*n is size of the matrix.
Hello,
This is a matlab exemple
http://www.mathworks.com/matlabcentral/fileexchange/44669-func2mat--convert-linear-function-to-matrix
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering
- Signal Processing