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PIL ImageChops.difference not working correctly(?)

Started byJon Reyes <everystepsayes@gmail.com>
First post2013-02-18 21:49 -0800
Last post2013-02-18 22:28 -0800
Articles 2 — 1 participant

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  PIL ImageChops.difference not working correctly(?) Jon Reyes <everystepsayes@gmail.com> - 2013-02-18 21:49 -0800
    Re: PIL ImageChops.difference not working correctly(?) Jon Reyes <everystepsayes@gmail.com> - 2013-02-18 22:28 -0800

#39185 — PIL ImageChops.difference not working correctly(?)

FromJon Reyes <everystepsayes@gmail.com>
Date2013-02-18 21:49 -0800
SubjectPIL ImageChops.difference not working correctly(?)
Message-ID<66d9a4fb-2f86-44c2-a393-cf7422ac5f5e@googlegroups.com>
I have two images generated from ImageMagick that I need to compare through PIL but when I compare them it says that the two images aren't identical. I tried viewing the supposed "difference" but all I see is a black image which means the two image are identical. ImageChops even returns the region where the supposed non - identical marks are, but there's nothing there. Any thoughts?

I just do this to compare if the two images are identical:
diff = ImageChops.difference(img1, img2)
if diff.getbbox() == None:
    #then the images must be the same

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#39186

FromJon Reyes <everystepsayes@gmail.com>
Date2013-02-18 22:28 -0800
Message-ID<27e25b0f-73ed-4094-b05e-c6c159bc222b@googlegroups.com>
In reply to#39185
Wow, what the heck, I just learned that using beyond compare if I compare the two images then I'll see a different section under tolerance mode. Anyone an expert on images? The two images have whites on that same image but they're different according to BeyondCompare. What's more, if I do a binary comparison the two images are the same. Guess I'll just find a way to compare images through binary in Python.

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