Comparing two images using PIL - Raspberry Pi Forums

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i'm trying compare 2 images , number value. googled , found example https://stackoverflow.com/questions/192 ... -linux-way.

valueerror need more 0 values unpack. i'm not sure why. everyone

code: select all

import math, operator pil import image def compare(file1, file2):     image1 = image.open("/home/pi/desktop/1.jpg)     image2 = image.open("/home/pi/desktop/2.jpg")     h1 = image1.histogram()     h2 = image2.histogram()     rms = math.sqrt(reduce(operator.add,                            map(lambda a,b: (a-b)**2, h1, h2))/len(h1))     return rms  if __name__=='__main__':     import sys     file1, file2 = sys.argv[1:]     print compare(file1, file2)

you comparing histograms of 2 images, not images themselves. if take copy of 1 image, rotate it, mirror or randomly permute individual pixels, histogram not change , both images classified identical.


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