[vtkusers] Help for sampling of polydata

[Jothybasu Selvaraj]

Have you generated vtkPolyData properly. Unless you post your code we
couldn't do much on this.


Jothy

On Wed, May 16, 2012 at 4:00 AM, Rong Xu <xurong1981 at gmail.com> wrote:

> Thank you for your suggestion!
>
> 2012/5/15 Jothybasu Selvaraj <jothybasu at gmail.com>
>
>> I think you should use vtkDecimatePro (there are many others in vtk) to
>> reduce the number of points.
>>
>
> I used vtkDecimatePro to reduce the number of points, but there is a
> problem when running ("vtkDecimatePro (047640E8): No data to decimate!").
> Then I used vtkTriangleFilter before vtkDecimatePro, but there still is the
> same problem. Do you have any ideas ?
>
>
>>
>> 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
>>> ===============================================
>>>
>>>
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>>
>>
>> --
>> Jothy
>>
>>
>
>
> --
>
> ---------------------
> 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
> ===============================================
>
>


-- 
Jothy
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