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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Have a question regarding quaternions. I obtained
the following parameters from running MultiResMIRegistration:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>[-0.000237939, -0.0875924, 0.171368, 0.981306,
11.589, 2.08898, 1.14517]</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I need to apply a transform that is half the
rotation and half the translation of the QuaternionRigidTransform as given by
the parameters above. The last 3 parameters are translation so halving those is
trivial. Question is how do I go about halving the effective rotation of the
transform? Which of the first 4 parameters do I change and can I simply half the
rotation angle or do I have to maintain a unit quaternion to avoid scaling
issues?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks.</FONT></DIV><FONT face=Arial size=2>
<DIV><BR>Cheers,</DIV>
<DIV>Andy</FONT></DIV></BODY></HTML>