Splitting Images?

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Jason
Jason on 22 Jun 2011
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!
  4 Comments
Jason
Jason on 22 Jun 2011
Thank you, that is why the floor function comes into picture.
Sean de Wolski
Sean de Wolski on 22 Jun 2011
yes, you could also use ceil.

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Accepted Answer

Sean de Wolski
Sean de Wolski on 22 Jun 2011
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.
  1 Comment
Jason
Jason on 22 Jun 2011
That was fast, and it was exactly what I needed, thank you, Sean!

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