[Insight-users] [BUG ?] Update of versor in versor rigid 3D transform

[Vincent Daanen]

Hi all,

yesterday, I point out why one of my registration test works so bad !
I was setting the intial transform (itk::VersorRigid3DTransform) by 
using SetRotationalMatrix and SetTranslation. Altough the SetTranslation 
does what it is expected to, the SetRotationalMatrix sets the matrix but 
the versor is not computed from this rotational matrix;
you can then have a unit versor and a rotation matrix of an angle 'a' 
around an axis v in the same component.
I don't know if this is a bug but according to me, such a thing should 
not be allowed ! Am I right  ?

hope it helps

 Vince

-- 
Vincent Daanen, PhD
Research Engineer, Post-Doctoral Position
Laboratoire TIMC/IMAG (Univ. Joseph Fourier - CNRS UMR 5525)
Equipe GMCAO
Institut d'Ingénierie de l'Information de Santé (IN3S)
Faculté de Médecine - 38706 La Tronche cedex - France
Tel: +33 (0)4 56 52 00 54 - Fax: +33 (0)4 56 52 00 55
Vincent.Daanen at imag.fr

"Les problèmes ne peuvent être résolus par
ceux dont l'horizon se limite aux réalités 
quotidiennes, mais par ceux qui rêvent de 
choses qui n'ont jamais existées et qui se 
disent : Pourquoi Pas ?"

J-F Kennedy, 1963.