rowblocks = 1 : blockSizeR : rows;
colblocks = 1 : blockSizeC : columns;
numrowblocks = length(rowblocks);
numcolblocks = length(colblocks);
for rowidx = 1 : numrowblocks
row = rowblocks(rowidx);
for colidx = 1 : numcolblocks
col = colblocks(colidx);
row1 = row;
row2 = row1 + blockSizeR - 1;
row2 = min(rows, row2); % Don't let it go outside the image.
col1 = col;
col2 = col1 + blockSizeC - 1;
col2 = min(columns, col2); % Don't let it go outside the image.
% Extract out the block into a single subimage.
oneBlock = b(row1:row2, col1:col2);
% Specify the location for display of the image.
subplot(numrowblocks, numcolblocks, sliceNumber);
imshow(oneBlock);
% Make the caption the block number.
caption = sprintf('Block #%d of 5', sliceNumber);
title(caption, 'FontSize', fontSize);
drawnow;
end
end
However, I recommend you consider https://www.mathworks.com/matlabcentral/fileexchange/35085-mat2tiles--divide-array-into-equal-sized-sub-arrays
