Can you not work with the data that was used to form the image rather than futsing about with image recognition techniques? Sounds like you are trying to apply a solution that is "easy" for humans therefore easy to express in a way people understand, but is very difficult to code. You may be much better describing the problem in a numeric domain which may be harder to think about, but will be much easier to code.

True laziness is hard work

In reply to Re^3: Can i Compare two images in perl ? by GrandFather
in thread Can i Compare two images in perl ? by deep3101

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