How do i split an image into 8x8 blocks using a function?

I need to split a 192x192 color image into blocks with 8x8 size. I also needed to split a grayscaled image same way which where i used this:

function x=cut(y)

for i=1:8:192

for j=1:8:192

x = y(i:i+7, j:j+7);

end

end

but i dont know how to do it with a color image.

Answer 1

[David Hill]

I assume you have the image processing toolbox. Look at Neighborhood and Block Processing.

blockproc()
col2im()

[Stefan Babic]

I actually need it to be in form of a function so i would need to add the z variable to the function i used for grayscaled image. I tried:

function x=cut(y)

for i=1:8:192

for j=1:8:192

for z=1:3

x = y(i:i+7, j:j+7, 3);

end

end

end

but it gives me grayscaled image in blocks instead color image in blocks. I am not good at it so dont know whats wrong there.