find endpoint coordinates(x,y) of connected components using pixelidxlist
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CC = bwconncomp(zz_out);
numPixels = cellfun(@numel,CC.PixelIdxList);
figure, imshow(zz_out);
[smallest,idx] = min(numPixels);
zz_out(CC.PixelIdxList{idx}) = 0;
- I have an image which has some concurrent connected components, say as: line segments.Now i want to extract all the endpoint's coordinates(x,y) of those lines using pixelidlist.*
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Walter Roberson
il 11 Giu 2017
bwmorph() and ask for 'endpoints'
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Walter Roberson
il 11 Giu 2017
[L, Num] = bwlabel(zz_out);
for K = 1 : Num
[epr{K}, epc{K}] = find( bwmorph(L == K, 'endpoints') );
end
Now epr{K} is the list of row indices of all of the endpoints of component #K, and epc{K} is the corresponding list of column indices. Any component that is not an isolated pixel should have at least two endpoints, and could have more if there are branches in it. (Note, though: I do not know how endpoint detection works if there are loops in the component.)
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