How to NaN selected threshold values of red,green and blue using matlab code

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How to NaN selected threshold values of red,green and blue using matlab code
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Jan
Jan on 23 Jun 2017
Please mention any details. What are the inputs, how is the threshold applied? Does "NaN values" is a verb, which means setting the pixel values to NaN?

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Accepted Answer

Rik
Rik on 23 Jun 2017
Don't hide information in the tags. Next time, have a read here. Your question is not clear, so this is the answer to what I guess to be your answer. I didn't take the time to check for syntax errors.
IM=rand(100,100,3);IM=uint8(255*IM);%dummy data
[r,c]=find(IM(:,:,1)==60 & IM(:,:,2)==100 & IM(:,:,3)==120);
IM(r,c,:)=NaN;

More Answers (1)

Jan
Jan on 23 Jun 2017
A bolöd guess:
mask = Img(:, :, 1) == 60 & ...
Img(:, :, 2) == 100 & ...
Img(:, :, 3) == 120;
Img(cat(3, mask, mask, mask)) = NaN;

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