[vtkusers] Help for sampling of polydata

[Rong Xu]

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!

-- 

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Best Regards!

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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
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