Multiple image histogram on the same figure

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.

Answer 1

[Image Analyst]

Why can't you just use hist() or histc(), and bar() or plot()???

[chess]

Because when I do that I get something like: which is very strange.

[Image Analyst]

You have to vectorize the array first:

counts = hist(array2d(:), 256);

Otherwise you'll get a histogram for every column in the image.