Split image in regions

How can I split an image into regions and display the histogram for each region? For example, I have an image of 1024x1024 pixels and I want to split it into regions by 480x480 pixels and plot the histogram for each...

Answer 1

[Walter Roberson]

480 does not divide into 1024; what would you like to do with the left-over 64 pixel border?

Answer 2

[Image Analyst]

Try this:

% Get sub-image
subImage = grayImage(1:480, 1:480);
% plot histogram in current axes
histogram(subImage(:));

Repeat for other sub images.

[Omim]

How can I generalize this? I need to split the image în subregions smaller thanks this, 30x30 pixels and I can't split the image manually...

[Walter Roberson]

30 does not divide exactly into 1024. What do you want to do with the extra 4 pixels per side?

[Image Analyst]

Just put it into a loop and change the indexes. Just see the FAQ for guidance: http://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F