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From: astro mmi on 8 Jul 2010 04:30
Hi everyone,
In the following code I am trying to divide an image into 8*8 blocks and then in each block I am treating every row as a sequence of samples in order to find its z-transform. The resulting data is processed through several stages and then we take IZT. Pls let me know how I can take the z-tranform of each such row in every block.

Thanks in advance.


i=imread('rice.png');
figure, imshow(i)
sizeim=size(i);

%Dividing the image into 8*8 blocks
blksiz=[8 8]; %block size
nob=ceil(sizeim./blksiz); %number of blocks in each dimension
C = mat2cell(i,repmat(blksiz(1),1,nob(1)), repmat(blksiz(2),1,nob(2)));

%Each cell is an 8*8 array dividing i into 'nob' 8*8 blocks;
for blkr=1:nob(1)
for blkc=1:nob(2)
A=C{i,j};
for t=1:blksiz(1)
A(t,:)=ztransform(A(t,:)/max(A(t,:)));
end
C{i,j}=A;
end
end
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