How do I get the fork points of a skeleton of an image?

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Soumyajit Pal - 2024-02-06T19:45:23+00:00
Question: How do I get the fork points of a skeleton of an image?

I want to find the fork points of a skeleton of an image. I have obtained the skeleton of the image using the bwmorph(binaryImage, 'skel', Inf) function.  

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  • How do I get the fork points of a skeleton of an image?

    • Expert Answer

    Profile picture of John Michell John Michell answered . 2025-11-20

    "A skeleton point having more than two adjacent points is called a fork point": bwmorph calls this a branch point.
     
    "Every point which is not an endpoint or fork point": these are just a normal segment point. It does not have a particular name, and I don't see why you'd call them branch point. If you want to obtain these, it's just the skeleton point minus the end and branch points:
     
    skelimage = bwmorph(binaryImage, 'skel', Inf);
branchimage = bwmorph(skelimage, 'branchpoints'); %branch (fork) points
endimage = bwmorph(skelimage, 'endpoints'); %end points
otherimage = skelimage - branchimage - endimage; %points other than branch and end

     


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