[ITK] [ITK-users] reference for setting versor components

Fri May 12 10:18:31 EDT 2017

As far as I remember this class has a SetMatrix method, just be careful as the rotation will be around a given center.

The ITK global domain transformations are all of the form A(x-c) + t + c  , with the nomenclature being A: matrix, c: center, t: translation, and offset: t+c-Ac

     hope this helps
           Ziv

From: Andrew Harris <aharr8 at uwo.ca>
Date: Friday, May 12, 2017 at 10:06 AM
To: Insight-users <insight-users at itk.org>
Subject: [ITK-users] [ITK] reference for setting versor components

Hello,
I'm hoping someone has a reference that will allow me to convert from a 3X3 rotation matrix to a 3-member versor rotation for the purposes of setting a known rotation about one axis as an initialization.  For instance, if I wanted the equivalent of a 10 degree rotation about the x-axis, I can build a 3X3 rotation matrix using sines and cosines, but the project I'm working on is using VersorRigid3DTransform as the transform type for the registration, so I'd like to use that for the initial transform.

Any help is appreciated, thanks.

--

AH

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