How to divide an image into 8x8 blocks?

I had an image of size 256*256 which is in ycbcr color space.I need to divide that input image into 8x8 blocks and need to apply walsh hadamard transform on each block.So please help me to divide the input in to 8x8 blocks.

Answer 1

[Birdman]

reshape(a,8,8,[])

[riyaj atar]

reshape(a,8,8,[]) this command will group a column of matrix x into 8 by 8 block.

Answer 2

[Image Analyst]

See the FAQ: https://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F