[Insight-users] ICP with surface normal.

[Luis Ibanez]

Hi Superzz,

ICP will only take into account the distances
between the points.

When you say that

   "the shape of you fixed points is a slope"

do you mean that all the points are located
along a straight line ?


If the points happen to be in a straight line,
that is a really bad case for applying ICP,
given that you could always slide one straigh
line along another one, therefore the point
correspondences are not unique.


If you post a screenshot to a public web site,
that will help us a lot to understand the problem.


      Luis

---------------------------------------------------------
On Mon, Jan 18, 2010 at 2:48 AM, superzz <jxdw_zlf at yahoo.com.cn> wrote:
>
> Hello
> I am using itkPointSetToPointSetRegistrationMethod to do point cloud
> registration.
>
> The shape of my fixed points is a slope. Moving points are picked on the
> slope upper surface. Due to environment restriction, I can only pick points
> on several small some areas on the slope upper surface.
>
> In some cases, the registration result is very well. But the others are not
> good. In the bad cases, the transformed moving points lay UNDER the slope
> upper surface. It is obviously incorrect because the points are picked on
> the slope upper surface, not under its surface.
>
> Does itk support taking surface normal into computation? Thus, the bad
> results would not appear anymore.
>
> Moreover, I want to set some verifcation points. Spatially, verifcation
> points are far from fixed points. So ICP needs ensure transformed
> verifcation points are far from fixed points also. e.g: distance >= 5mm.
>
> Thanks
>
> superZZ
> --
> View this message in context: http://old.nabble.com/ICP-with-surface-normal.-tp27207075p27207075.html
> Sent from the ITK - Users mailing list archive at Nabble.com.
>
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