Assuming you have used load to read the mat-files and the images are stored as X and Y, you can look for an exact match by checking each subimage of Y.
found = false;
for r = 1:size(Y,1)-size(X,1)+1
for c = 1:size(Y,2)-size(X,2)+1
for s = 1:size(Y,3)-size(X,3)+1
if isequal(Y(r:r+size(X,1)-1, c:c+size(X,2)-1, s:s+size(X,3)-1), X)
found = true;
break
end
end
if found
break
end
end
if found
break
end
end
if found
fprintf('Match found at: %d %d %d\n', r, c, s);
else
fprintf('No match found\n');
end
This reports the coordinates of the low-index corner of the match.
If the subimage is not an exact subimage, you need to use some other technique, such as normalised cross-correlation.
