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I have holes in my outline. How to fill holes because i like to apply a poly2mask to closed outline.Please I need your help

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Mohamed Amine 2012-6-19

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I have holes in my outline. How to fill holes because i like to apply a poly2mask to closed outline

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http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers

Mohamed Amine 2012-6-19

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my images url :https://www.dropbox.com/sh/gb02kopgo0ukmx2/WesN7ZS7C1

how t fill holes in outline and how to detect pixels inside outline that he will be closed

Image Analyst 2012-6-19

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That link doesn't work.

Walter Roberson 2012-6-19

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It had an extra colon at the beginning

https://www.dropbox.com/sh/gb02kopgo0ukmx2/WesN7ZS7C1

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回答（1 个）

Image Analyst 2012-6-20

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Try edge linking. Here's one professor's implementation: http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/#edgelink

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PLease give me exemple with this method, i have this file that represent my image : https://www.dropbox.com/sh/gb02kopgo0ukmx2/WesN7ZS7C1

it is a matrix that represent my image i have se this implimentation but i have not idea how to use this methode to link my outline, please help me.

Walter Roberson 2012-6-20

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Example of using the method is at http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/LineSegments/example/index.html

Mohamed Amine 2012-6-20

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I see this exemple but when i test it my outline is not linked. So my question is how to linked outline because i have holes in my outline.

Mohamed Amine 2012-6-20

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if you see the spoon in exemple is not closed.

Walter Roberson 2012-6-20

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Threshold and convert to BW before doing the Canny ?

The image link you gave above no longer has an image, and now has only a .mat file.

My memory of your image is that you had a fairly large gap, possibly larger than was suitable for this technique.

Have you tried using a convex hull and finding the "inside" edge of that?

Image Analyst 2012-6-20

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You may have to adjust some parameters to get it to link larger gaps. Or look for different edge linking routines or write your own. Or else just process your image in a different way so that you don't get gaps in the first place. Maybe use contour() or something...

Mohamed Amine 2012-6-20

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I don't do the canny because my outline is SLD.mat and when i do im2bw(SLD), it is the same, my problem is to linked my outline and to find pixels inside outline using poly2mask

Walter Roberson 2012-6-20

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Threshold and convert to BW is a suggestion on how to deal with the differing reflectivity levels in the spoon. You asked for an example, right, not us to do your work for you, right?

Have you tried using a convex hull and finding the "inside" edge of that?

Please post your image up again; I seldom bother to download .mat files

Image Analyst 2012-6-20

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By the way, I can't use dropbox - my company blocks that one for some reason. Try tinypic.com.

Mohamed Amine 2012-6-20

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I test convex hull but there are many pixels that outsside outline so it is not a good method.I need your advice and not to do my work

Walter Roberson 2012-6-20

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We're going to need the image back.

Image Analyst 2012-6-20

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Also tell us the big picture. Forget about the outline for the moment. What do you really want to measure in the image?

Ryan 2012-6-20

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The small holes could be closed with a dilation and re-thinning, iirc. Then find the end points (which would be the top gap) and connect them with a line.

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