Sunday, 8 September 2013

How to 2-D convolution matrix using fft2

How to 2-D convolution matrix using fft2

As function A=convmtx2(H,[m n]) in matlab(Image Processing toolbox), I
would like to compute the convolution matrix in 'same' but not in 'full',
and I need B = ATA at last, how should I compute B using fft2?

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