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Best method to take a difference between 2 images?

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Jialu Wang
Jialu Wang 2019-3-2
回答： Image Analyst 2019-3-2
I want to take the difference between the following 2 images and then threshold the final output into 2 distinct regions.pdms1.jpg
pdms2.jpg
However, the problem now is I keep getting image differences that would be hard to threshold/segment because the 2 regions are too similar in value and just look like dark patches (below). I've tried all kinds of image subtraction methods. Please help me out and give me any pointers thank you
diff2.jpg

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Image Analyst
Image Analyst 2019-3-2
Did you try imabsdiff()?

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