edge merging
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Hello,
I am comparing different techniques for extraction grains from an image: one method that I want to test is using edge detection =>then fill the edge wit imfill and use regionprops to determine area, perimeter, centroid etc.
Now after some noise cleaning : edge(ImageFin1,'sobel') gives good results but the edge or broken at some places , so imfill does not work well.
http://imageshack.us/photo/my-images/269/testforupload.jpg/ (object labeled and plotted with centroid)
Now I was looking for some fast algorithms to connect the edge of the same grains, I could work with the fact that the centroid should be at a distance smaller than the average diameter of a grain , but that would be rather slow. I also tried some existing posts on edge linking like http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/LineSegments/drawedgelist.m but that algroithm does not make the connections, it only identifies edge, if I understood it correctly.
So two questions : does anybody knows a quick algroithm to connect the edges? e.g. by filling the in between pixels
or is there a way to join object based on their centroid, I mean how to join two seperately labeled objects to one object that can be assed bu regionprops
thanks for the help, time and effort in advance
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Answers (2)
Elad
on 14 Jun 2012
I asked something simular, check : http://www.mathworks.com/matlabcentral/answers/39600-close-lines-after-edge-detection
Iago Lopez Grobas
on 28 Apr 2020
Hello, do you have an answer to this now? it would be very helpful since I am having the same problem
thanks
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