Multiple image histogram on the same figure

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chess
chess 2014-8-4
评论： Image Analyst 2014-8-4
Hi I would like to know how I can plot multiple histogram on the same figure with different color next to each other using imhist command. I know how to do it using hist for a vector but I am looking for doing exactly same thing but for images. something like uploaded image but using imhist.

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Image Analyst
Image Analyst 2014-8-4
Why can't you just use hist() or histc(), and bar() or plot()???
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chess
chess 2014-8-4
Because when I do that I get something like: which is very strange.
Image Analyst
Image Analyst 2014-8-4
You have to vectorize the array first:
counts = hist(array2d(:), 256);
Otherwise you'll get a histogram for every column in the image.

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