[vtkusers] vtkVoxelContoursToSurfaceFilter - control number of triangle of the generated mesh ?

[Ashika Umanga Umagiliya]

Anyone ..please?

On 20 October 2010 12:20, Ashika Umanga Umagiliya <aumanga at biggjapan.com>wrote:

> Greetings all,
>
> We generate contour data using a seperate contour detecting algorithm and
> use "vtkVoxelContoursToSurfaceFilter" to generate the mesh.
> Source image size is around 1000x1000 pixels.
> Please refer image at - http://oi55.tinypic.com/2e2f2xd.jpg .
>
> So,the maximum x,y coordinates of contour data is also in the range
> 1000x1000.
> As see in the image at - http://oi51.tinypic.com/4lt9c3.jpg ,
> , every small circle is added as a "vtkPoint" when generating
> "vtkPolyData".
>
> At first vtk could not generate mesh and crashed .
> So I divide original node x,y data by 5 (scaled down by 5) before sending
> to  "vtkPoints.SetPoint()".
>
> Still the generated mesh has huge number of triangles.
> Here is the genereated mesh - http://oi51.tinypic.com/98soib.jpg
> Wireframe of the mesh  - http://oi51.tinypic.com/r7ly10.jpg
> Zoomed in -  http://oi53.tinypic.com/r08k07.jpg
>
> My question is ,is there a way to produce the optimized number of triangles
> for the mesh ? ()
> Our target image range is from 512x512 to 2000x2000. (that is,counter )
> Any tips of adjusting the best triangle count depend of the image size?
>
> Thanks in advance,
> umanga
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20101022/88aac3ee/attachment.htm>