For a Trimap, how do to calculate the number of pixels in background, foreground and unknown region?

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Rachel 2014-1-18

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https://ww2.mathworks.cn/matlabcentral/answers/112800-for-a-trimap-how-do-to-calculate-the-number-of-pixels-in-background-foreground-and-unknown-region

评论： Image Analyst 2014-1-18

Hi all,

I have attached a trimap image on which i am working. I need to determine the number of pixels which are definitely background, definitely foreground and in the unknown region. Can anyone help?

Thanks

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Image Analyst 2014-1-18

I never heard of a trimap. You forgot to attach your image. Please define what parts of your image (once we can actually see it) are foreground, background, and unknown.

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