Calculate number of pixels changed by subtracting two BW images

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yang
yang am 8 Nov. 2013
Bearbeitet: yang am 9 Nov. 2013
Hello, I need to calculate number of pixels whose color changes in two BW images consecutively taken with my camera. Can someone provide me the code? Thanks!
For instance I have 1.jpg and 2.jpg.
if true
a = imread('1.jpg');
b = imread('2.jpg');
Z = imsubtract(a,b);
% code
end
After this code, I think I have to count the number of non-zero values in 'Z'?
I want to include the pixels changing either way (i.e. from black to white, and from white to black).
Thanks! Yang

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