Thread Subject:

dividing RGB Images

I have an image of 256x384
i want to divide the image into 4x4 bloks can any one help me. i have code but this works for gray scale images.

[r c d] = size(I);
bs=4; % Block Size (4x4)
nob=(r/bs)*(c/bs); % Total number of 4x4 Blocks
nob
% Dividing the image into 4x4 Blocks
kk=0;

 
for i=1:(r/bs)
for j=1:(c/bs)
   
    
Block1(:,:,kk+j )=I((bs*(i-1)+1:bs*(i-1)+bs),(bs*(j-1)+1:bs*(j-1)+bs));
 end
kk=kk+(r/bs);
end



this code works for grascle images but i have rgb or luv image
please help me