Locate an Image with the higher pixel alteration

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Andrew
Andrew 2016-4-25
回答： Image Analyst 2016-4-25
Hi there.
I'm new to Matlab, and i would like some help from experts!
The problem.
I have a series of MRI Images that shows a specific region of the body as a function of time. What i want to do is to locate (automatically) the frame with the maximum variation in luminosity in a specific region of the Image. The problem is that i have some regions with strong artefact which they have greater luminosity values than the Region of Interest.
Below you can see 2 of the images. The first one is the base object, and the second is the one with the higher pixel variation.
Thank you in advance. Andrew

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回答（1 个）

Image Analyst
Image Analyst 2016-4-25
I'd look at the the coefficient of variation (CV), also known as relative standard deviation (RSD) That way, the variation in "luminosity" is normalized to the brightness in the region.

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