Image threshold value question

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Claire Redfield
Claire Redfield 2013-2-20
Hello guys, Normally we set one value 'a', then we have [0 a]= black, [a 255]=white My question is, can we do it like this way, [0 a]=black, [a b]=white, [b 255]=black I hold you can understand my terrible description.

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Image Analyst
Image Analyst 2013-2-20
Sure, just do two comparisons:
binaryImage = grayImage >= a & grayImage <= b;

更多回答（1 个）

Thorsten
Thorsten 2013-2-20
I = imread('cameraman.tif');
a = 100; b = 150;
ind = setdiff(find(I > a), find(I < b));
B = logical(size(I));
B(ind) = 1;

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