Counting overall pixel change

Posted by martenszeus on
URL: http://imagej.273.s1.nabble.com/Counting-overall-pixel-change-tp3692482.html

Can anyone suggest a way to compare two images (in a stack from an original video) and find out how many pixels are different in the second, relative to the first? Each image is 8-bit B/W, so what I'd like to count is the sum of exactly how many black pixels become white and vice versa from one slice to the next.  I'm dealing with stacks of approximately 500 images, and would like to generate an integer string from these comparisons.
Thanks much for any help!