Divide a matrix into submatrices in MATLAB

Question

I have an RGB image of size 412x550. I want to divide it into sub matrices of size 2x2. I have tried using mat2cell function but it is

Answer 1

You should use the function im2col. It is exactly what you need.

A = rand(412,550);
B = im2col(A,[2 2]);

The doc is there:

http://www.mathworks.fr/help/images/ref/im2col.html;jsessionid=4d24325613716d84d4635b4fc636