[Insight-users] about register point set with surface

[Luis Ibanez]

Hi Yixun,


If the PointSet has way more many points than the surface then you may
want to inverse the roles of boths points sets.

That is, use the points in the surface as the Fixed PointSet, and use
the points in the PointSet for generating the DanielssonDistanceMap.

Deformable registration is a more involved activity.  You may want to
solve your registration firts a Rigid Transform, then change to an
Affine transform, and when you master this one, then you can move
into using BSplines.



   Regards,



       Luis



----------------------------

Yixun Liu wrote:

> Hi,
>  
> Another question needs your help. The point set has thousands of points, 
> but the mesh only has hundreds of points. The point set has too many 
> points than the mesh has. Could they be registered correctly, especially 
> be registed non-rigidly ,such as Bspline?
>  
>  
> Best regards,
>  
> Yixun Liu 
>  
>  
>  
> 
> Hi Yixun,
> 
> Yes, it is similar to that example.
> 
> Note that the "Iterative Closest Point" algorithm is covered by
> a patent from General Motors, that's enough reason for *NOT*
> using that algorithm.
> 
> The use of a distance map, as suggested in the previous email
> will give you faster performance than ICP, specially if your
> surface has many points.
> 
> 
> --------
> 
> For anybody interested in the dark side of Patents, and the
> alienation of the academic public system, you may want to read:
> 
>       "University Inc
>        The Corporate Corruption of American Higher Education"
>        by Jennifer Washburn
> 
> http://www.amazon.com/exec/obidos/tg/detail/-/0465090516/qid=1116161355/sr=8-1/ref=pd_csp_1/102-1813554-1671344?v=glance&s=books&n=507846
> 
> 
> 
>       "Shakespeare, Einstein, and the Bottom Line,
>        The Marketing of Higher Education"
>        by David L. Kirp
> 
> http://www.amazon.com/exec/obidos/tg/detail/-/0674011465/ref=reg_hu-wl_mrai-recs/102-1813554-1671344?%5Fencoding=UTF8&v=glance
> 
> 
> 
> --------
> 
>    Regards,
> 
> 
>       Luis
> 
> 
> 
> -------------------
> Yixun Liu wrote:
> 
>  > Thank your reply!
>  > 
>  > However, I am not very clear about what you mean. What your mean is
>  > similar to \example\registration\IterativeClosestPoint3?  If I
>  > use PointsettoImageRegistrationMethod which Metric will I use?
>  > 
>  > Best regards,
>  > 
>  > Yixun Liu
>  > 
>  > -- Original Message -----
>  > From: "Luis Ibanez" <luis.ibanez at kitware.com
>  > <mailto:luis.ibanez at kitware.com>>
>  > To: "Yixun Liu" <yxliu at fudan.edu.cn <mailto:yxliu at fudan.edu.cn>>
>  > Cc: <insight-users at itk.org <mailto:insight-users at itk.org>>
>  > Sent: Friday, May 13, 2005 8:52 PM
>  > Subject: Re: [Insight-users] about register point set with surface
>  >
>  >  >
>  >  > Hi Yixun,
>  >  >
>  >  > I would suggest you to take the Surface and use all its points
>  >  > in order to create a Distance Map using the DanielsonDistance filter.
>  >  >
>  >  > Then perform registration using the PointSet and the Image 
> distance map.
>  >  >
>  >  > You will find classes in ITK for performing PointSet to
>  >  > Image registration:
>  >  >
>  >  > Follow the trail from:
>  >  >
>  > 
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1PointSetToImageRegistrationMethod.html
>  >  >
>  >  >
>  >  > Regards,
>  >  >
>  >  >
>  >  >    Luis
>  >  >
>  >  >
>  >  >
>  >  > ---------------------
>  >  > Yixun Liu wrote:
>  >  >
>  >  >> Hi,
>  >  >>
>  >  >> I have a surface represented by point set and another surface
>  >  >> represented by mesh. I need to regeister them non-rigidly. 
> Anybody give
>  >  >> me some advice about it?
>  >  >>
>  >  >> Thank you in advance!
>  >  >>
>  >  >> Best regards,
>  >  >>
>  >  >> Yixun Liu
>  >  >>
>  >  >>
>  >  >> 
> ------------------------------------------------------------------------
>  >  >>
>  >  >> _______________________________________________
>  >  >> Insight-users mailing list
>  >  >> Insight-users at itk.org <mailto:Insight-users at itk.org>
>  >  >> http://www.itk.org/mailman/listinfo/insight-users
>  >  >
>  >  >
>  >  >
>  >  >
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users