Simulation of DCT, Walsh, Hadamard, Haar and Slant transform using variable block sizes

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Performs non sinusoidal image transforms on gray-scale images and DCT using the dct matrix.

t=getInvWalshTransform(im,N)
function t=getInvWalshTransform(im,N)
h=walsh(N);
m=log2(N);
t=(1/(2^m))*h'*im*h;

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