[vtkusers] Several point clouds alignment using ICP

[Wes Turner]

You can either clip based on a view frustrum, or using nearness constraints
after manually correcting for the rotation.  Either should work. Make sure
you turn off the initial alignment of centroids on the PCA.

- Wes

On Fri, Mar 4, 2011 at 11:30 AM, nuno.jf <nunofernandes7 at gmail.com> wrote:

> Hi Wes,
>
> Thank you very much for you message. My problem is that I don't know much
> about ICP parameters and I don't know how to feed ICP only with the points
> in the overlap region of both point clouds. Is there a basic way of doing
> this?
> Best regards,
> Nuno
>
> For ICP, the issue is that every point you choose for the source point set
> will feed into the calculation of the metric.  If the clouds represent
> different sections of the same part, and you choose points outside of the
> overlap region, then the alignment will tend to increase the area of
> overlap.  Since you seem to have a good initial set for the alignment, I
> would use this initial guess to estimate the area of overlap and then only
> choose points from the source set that lie within that region.
>
> - Wes
>
> --
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> Sent from the VTK - Users mailing list archive at Nabble.com.
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-- 
Wesley D. Turner, Ph.D.
Kitware, Inc.
Technical Leader
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4920
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