clear an area in binary image
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Hi guys,
I need to clear area in a binary image.
I only need the center part of a binary image, for example, only the center 100x100 image out of 1000x1000 image.
I know there is an easy way, prob just 1-2 line of code.
please show me your talent.
good day
C
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Accepted Answer
Walter Roberson
on 14 Aug 2011
W = 100; %window size
img((end-W)/2+1:(end+W)/2, (end-W)/2+1:(end+W)/2) = 0;
Note: this will not work if your window size is even and your image size is odd, or if your window size is odd and your image size is even: in such cases, "center" is not well-defined.
4 Comments
Walter Roberson
on 15 Aug 2011
W = 400;
if islogical(img)
t = false(size(img));
else
t = zeros(size(img),class(img));
end
t((x-W)/2+1:(x+W)/2,(y-W)/2+1:(y+W)/2) = img((x-W)/2+1:(x+W)/2,(y-W)/2+1:(y+W)/2));
Note: there are variations of the above that may be a bit clearer or shorter if you can guarantee that the img will not be of type "logical" and will not be of type "int64" or "uint64", or if you can guarantee that the code will only be used in R2011A or later.
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