[vtkusers] create the mesh for a surface

[家斌 梁]

Yes I did 
But my original surface is just a surface without thickness
but the result i got has a thickness
that mean the surface of result have  1mm offset from my original surface
that will cause inaccuracy 
so i want to shrink that result to compensate this 1mm
I know for 2Dimage  i can use like erosion
but to the polyData how can i reduce the thickness
--- 09年6月29日，周一, David Doria <daviddoria at gmail.com> 写道：


发件人: David Doria <daviddoria at gmail.com>
主题: Re: [vtkusers] create the mesh for a surface
收件人: 
抄送: vtkusers at vtk.org
日期: 2009年6月29日,周一,下午10:24


I think you just need to run the result of the splat through vtkContourFilter.

I just made this demo - see if it does what you need:
http://www.vtk.org/Wiki/Create_a_surface_from_Unorganized_Points_%28Gaussian_Splat%29

Thanks,

David



On Mon, Jun 29, 2009 at 9:58 AM, <phoenix.sjtu at yahoo.com.cn> wrote:







I want to creat a mesh form the points cloud on the surface
but Delaunary3D and surface reconstruction do not work
 
So Finally i have to use the gaussian splatting
it seem correct
but what i got it's not a mesh
It's a a surface with thickness
So  does some one know how to shrink this thickness
 
It's a surface with thickness in polyData
I tried shrinkfilter it just shrink the size of the triangles, it doesn't work
Thank you very much




--- 09年6月24日，周三, David Doria <daviddoria at gmail.com> 写道：





发件人: David Doria <daviddoria at gmail.com>
主题: Re: [vtkusers] create the mesh for a surface
收件人: 
抄送: vtkusers at vtk.org
日期: 2009年6月24日,周三,下午11:18



On Wed, Jun 24, 2009 at 10:45 AM, $B2HIL(B $BNB(B <phoenix.sjtu at yahoo.com.cn> wrote:













Hi everyone
this is the first time i use this mail list
I hope it work
please reply me thank you very much
 
I have a point cloud in 3D scanned from a surface of an object
I want to create the mesh(triangulization) for this surface
 
I tried vtkSurfaceReconstructionFliter, but the output is not a mesh
 
I tried vtkDeluanay2D but it project my point to a 2D plan
and my points is on a complex surface(for example a flower) 
i cannot find the project function
 
i tried vtkDeluanay3D it will create the mesh in side the object
I set alpha = 0.2 it will remove most the edge inside but it also remove the edge on my surface
Someone has some good idea?
I thing it is problem very commun create a mesh for a surface 
I see some CAD software do it perfectly i know there must be a solution
 
Thank you very much for you attantion
LIANG Jiabin

Liang,

The list received your question correctly, welcome.

Is your data from a single lidar scan (where it is all acquired from a single viewpoint)? Or do you have points on the full 3d object (ie. front and back and top and bottom, etc)?

Thanks,

David

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