[Insight-users] 3 pairs of points in 3D Iterative Closest Point registrations

[Patrik Brynolfsson]

Hi,

I am working on a project in where I have to register two images based on
user input of corresponding points in the images. The images are in 3D so I
opted for the VersorRigid3DTransform with the LevenbergMarquardtOptimizer,
basically following IterativeClosestPoint2.cxx in the examples folder.
Everything compiles fine, but I was planning on using 3 pairs of user
selected points but the Levenberg-Marquardt optimizer complains:

vnl_levenberg_marquardt: Number of unknowns(6) greater than number of data
(3)

Do I have to use another optimizer in order to use fewer than six points?
Surely 3 pairs of points should be enough to determine a rigid transform in
3D?

---
Patrik Brynolfsson
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.itk.org/pipermail/insight-users/attachments/20101005/bfb4c9d6/attachment.htm>