[Insight-users] Simplify a set of points in ITK

[Arnaud GELAS]

Hi Marta,

If the underlying container of your pointset is a vector container 
(which is the default), you only need to generate a random sequence in 
between 0 and the number of points in your container.

You may have a look at vnl_random, here:
http://www.lems.brown.edu/vision/vxl_doc/html/core/vnl/html/classvnl__random.html

HTH,
Arnaud

On 11/24/2010 11:17 AM, Marta Peroni wrote:
> Hi!
> I have a kind of "dummy" problem. I do need to select a subset of 
> point cloud describing the contour of a structure (the points are 
> previously derived with the ITK Review implementation of Marching 
> Squares and therefore I do have *lots* of points).
> I found a very nice implementation of this in CGAL 
> Random_Simplify_Points, but unfortunately I cannot include the whole 
> library in my project.
> So here it comes the question:
> I did store my points (x,y,z) in a PointsContainer (as in 
> PointSet2.cxx). Now in order for the algorithm to work, I need to 
> randomly shuffle / randomly extract from the container (shuffle would 
> be the best option).
> Is there something similar to 
> itk::ImageRandomNonRepeatingIteratorWithIndex but for points 
> containers?and/or a shuffle method?
> thanks a lot
> Marta
> -- 
> *******************************************************************
> Marta Peroni
> PhD Student - Bioengineering department - Politecnico di Milano (IT)
>
> contacts:
> mail: marta.peroni at mail.polimi.it <mailto:marta.peroni at mail.polimi.it> 
> , m.peroni at gmail.com <mailto:m.peroni at gmail.com>
> mobile: +393488202136 (IT) +16178186365 (US)
> office: +39 02 2399 9022
>
> ********************************************************************

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