MATLAB: Boundary edge extraction from surface mesh

boundary-extractionsurface-mesh

I have open SURFACE- NOT SOLID (say a hemisphere) represented using mesh (imported as obj). I want to extract the boundary of the open surface(circle in the case of a hemisphere). i.e. the set of boundary edges which are 3 dimensional. Is there any function which can do this? Please have a look at the attached image

Best Answer

You can use e.g. surfedge function in iso2mesh toolbox (<http://iso2mesh.sourceforge.net/cgi-bin/index.cgi)>. If you give triangulation as an argument, it returns the indices of the open edges.
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