Split image in regions

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Omim
Omim 2016-4-14
评论： Image Analyst 2016-4-15
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...

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回答（2 个）

Walter Roberson
Walter Roberson 2016-4-14
480 does not divide into 1024; what would you like to do with the left-over 64 pixel border?
Image Analyst
Image Analyst 2016-4-14
Try this:
% Get sub-image
subImage = grayImage(1:480, 1:480);
% plot histogram in current axes
histogram(subImage(:));
Repeat for other sub images.
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Walter Roberson
Walter Roberson 2016-4-15
30 does not divide exactly into 1024. What do you want to do with the extra 4 pixels per side?
Image Analyst
Image Analyst 2016-4-15
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

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