How to extract object after edge-detection?

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Sayak 2012-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/55538-how-to-extract-object-after-edge-detection

回答： Mojeed Salmon Olatunde 2016-12-16

I have a picture that consists of 4 people. My goal is to extract the four people based on the edge detection only. Is it possible? If yes how do I make the approach?

picture:: http://postimage.org/image/iri6wtrdl/

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Image Analyst 2012-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/55538-how-to-extract-object-after-edge-detection#answer_67345

Threshold to find the people, then use watershed. See this for an example: http://blogs.mathworks.com/steve/2006/06/02/cell-segmentation/

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Image Analyst 2012-12-5

That's because you haven't tried to implement Steve's example yet.

Sayak 2012-12-7

Yes, yes. Let me study it first. I'm coming back to this thread after few days. Anyways thanks again for always helping me out.

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Mojeed Salmon Olatunde 2016-12-16

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Please after applying canny, and getting the edge, please how can I extract only the edge I get to aquire the pixels of edge only without background, and get the gray value of the pixels of edge only, without background.