How do I calculate a threshold from one ROI and calculate a mean from a larger ROI that only takes into account pixels above this threshold?

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Roshmi 2014-7-22

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评论： Roshmi 2014-7-31

I've never coded a Matlab program to analyze images so I'm having some trouble with this. What I'd like to do is take the mean brightness/intensity of a small region of interest, set a threshold 2 SD below this mean, and then find the mean of a larger region of interest only taking into account the values above threshold. Could anyone help me with this?

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Image Analyst 2014-7-22

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See attached code to produce this:

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Image Analyst 2014-7-26

Roshimi, haven't heard back from you. Did my answer solve your question? Or are you still unable to do what you want to do?

Roshmi 2014-7-31

Hey! I haven't worked with Matlab in several years, so I'm trying to relearn everything. I'll watch your image segmentation tutorial though and see how it goes. Thanks for your help!

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