hi, i need to divide an image into 4 equal halves (like + sign) and again divide each block into 4 equal halves( like + sign), and need to find max value of each block, as a result i will get 16 values for an image

Thanks in advance, plz help me with one or two line matlab code

Answer 1

[Image Analyst]

blockproc() can do that. I'm attaching two examples that you will easily be able to use directly or modify.

Answer 2

[Jos (10584)]

help blockproc