MATLAB: Splitting Images

splitting images

Hi, I have a question here.
Take for example an image of size n by m. What I want is to split the images into 4 similar quadrants as follows: http://www.flickr.com/photos/jokerzy89/5859808219/ Next, I want to swap the following. (1)A and C (2) B and D, then display the final result as a new image.
Can someone please help? Thank you!

Best Answer

swap1324 = @(x)([x((floor(size(x,1)/2)+1):end,(floor(size(x,2)/2)+1):end) x((floor(size(x,1)/2)+1):end,1:floor(size(x,2)/2)); x(1:floor(size(x,1)/2),(floor(size(x,1)/2)+1):end) x(1:floor(size(x,1)/2),1:floor(size(x,2)/2))]);
I = imread('cameraman.tif'); %sample image
I2 = swap1324(I);
imtool(I2)
Obviously the above should be broken down into it's own function that doesn't have to repeat the function floor(size(stuff))) over and over again.
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