how to find the intensity differences between two images Eg An image contains Fire and Fire-like pixels(orange,apple,sun)

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how to find the intensity differences between two images Eg An image contains Fire and Fire-like pixels(orange,apple,sun)
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Adam
Adam on 2 Dec 2016
What is wrong with the obvious option of just subtracting one from the other? If they are integers you will need to convert either to signed integer or to double first though.

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