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How can I count the number of white pixels in a binary image with MATLAB?
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To determine the values of one or more pixels in an image and return the values in a variable, use the impixel function. You can specify the pixels by passing their coordinates as input arguments or you can select the pixels interactively using a mouse.
The function NNZ should do the trick, since "white" is represented as 1 and "black" as 0 in a binary image img:
nWhite = nnz(img);
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