Using "imhist" function in Matlab to plot multiple histograms on the same figure

I'm new to Matlab and am trying to do a bit of image processing. I have two color images that I convert to grayscale. My goal is to be able to put the histograms for both grayscale images on the same figure so I can compare them. My code looks like this:

a=imread('image1.jpg')
agray=rgb2gray(a)
b=imread('image2.jpg')
bgray=rgb2gray(b)
figure,imhist(agray)
figure,imhist(bgray)

The code works fine for looking at the two histograms independently, but I can find how to combine them into one figure for comparison. Please help!!

Answers


If you want both on the same axes and you don't mind loosing the lower bar, try this (I don't have the Image Toolbox right now, so I haven't tested it):

a=imread('image1.jpg')
agray=rgb2gray(a)
b=imread('image2.jpg')
bgray=rgb2gray(b)
[counts,x] = imhist(agray)
stem(counts,x,'b')
hold on
[counts,x] = imhist(bgray)
stem(counts,x,'r')

Try this!

figure (x),
subplot(2,1,1); imhist(agray);
subplot(2,1,2); imhist(bgray);

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