[vtkusers] Fwd: Help for sampling of polydata

[Jothybasu Selvaraj]

---------- Forwarded message ----------
From: Jothybasu Selvaraj <jothybasu at gmail.com>
Date: Tue, May 15, 2012 at 3:48 PM
Subject: Re: [vtkusers] Help for sampling of polydata
To: Rong Xu <xurong1981 at gmail.com>


I think you should use vtkDecimatePro (there are many others in vtk) to
reduce the number of points.

Jothy

On Tue, May 15, 2012 at 3:46 PM, Rong Xu <xurong1981 at gmail.com> wrote:

> Dear, all:
>
> I extract a surface of one object from 3D ultrasound image, but there are
> many points on extracted surface (more than 300,000). So I want to sampling
> half or 25% representative points from the whole point set. Then I tried
> vtkShrinkPolyData method and set shrink factor as 0.25, but the number of
> points from shrinked result is not changed compared with the whole point
> set. Does anyone have any ideas about my purpose ?
>
> Thank you for your help!
>
> --
>
> ---------------------
> Best Regards!
>
> ===============================================
> Rong Xu,  Ph.D Student
> Ohya Lab
> Graduate School of Global Information and Telecommunication
> Studies (GITS), Waseda University
> 1-6-1 Nishi Waseda, Shinjuku-ku, Tokyo, Japan (¨“169-8050)
>
> Tel:          +81-80-4208-1207
> E-mail:     xurong1981 at gmail.com
>                xurong at fuji.waseda.jp
> ===============================================
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
>


-- 
Jothy




-- 
Jothy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20120515/fbe68dcc/attachment.htm>