how to find pixel having a specific value and copy those regions to a new matrix
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Elysi Cochin
il 20 Set 2017
Commentato: Walter Roberson
il 20 Set 2017
find pixel having a specific value and copy those regions to a new matrix...
[rows, columns] = find(L == 0);
how to copy to a new matrix
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Bjorn Gustavsson
il 20 Set 2017
Something like this should get what you ask for:
Img = peaks;
clf
subplot(2,1,1)
imagesc(Img),colorbar
I2 = 0*Img;
Irange = [2 4];
I2(Irange(1)<=Img(:)&Img(:)<=Irange(2)) = Img(Irange(1)<=Img(:)&Img(:)<=Irange(2));
subplot(2,1,2)
imagesc(I2)
HTH
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Walter Roberson
il 20 Set 2017
I usually put the condition into a variable to avoid recomputing it.
I2 = zeros(size(IMG), class(IMG)); %but 0*Img works too
mask = Irange(1) <= Img & Img <= Irange(2);
I2(mask) = Img(mask);
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