How to contour extraction by stroke？

C++
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How to extract the contour of the bone by draw points near the edge of the bone?

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welcome.

please show your effort into solving your task.

related: Contour matching and evaluation criteria？

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@wulicheng , did you mean something interactive, like snakes ?

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yes, I know snakes,but i do not have the code? Do you have source code?

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please take a look at the contours tutorials

if you really need something interactive (i doubt so),
there is also an IntelligentScissors implementation

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Try CVUI which is a great library supporting both C++ and Python OpenCV.
CVUI enables the fast prototyping of interactive applications using OpenCV.

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thank you, that is what i need!

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