[Insight-users] Demons TimeStep

[Miller, James V (Research)]

The TimeStep is used to determine how much of the "update field" to apply
to the current vector field.

The LevelSetMotionRegistration function and filter use a dynamic time step.  You could look at that code to see how modify the timestep.

Jim



-----Original Message-----
From: insight-users-bounces+millerjv=crd.ge.com at itk.org
[mailto:insight-users-bounces+millerjv=crd.ge.com at itk.org]On Behalf Of
Xavier Kite
Sent: Friday, May 20, 2005 6:30 AM
To: insight-users ITK
Subject: [Insight-users] Demons TimeStep


Hi, 

I'm using the Demons technique to register two 3D brains. And I meet some difficulties.
I see that the TimeStep used is constant and I would want to explore the results if it wasn't the case. Does it exist a method that computes the optimal TimeStep at each iteration?
I would want to know where the TimeStep is used? What's his meaning and in which class is it used and implemented?
It appears that the ComputeGlobalTimeStep computes the TimeStep but I can't find where this method is implemented. It's declared in the __itkFiniteDifferenceFunction_h_ but where is her implementation?
I hope someone can help me...

Thanks

   Xavier

Protek-on: CaraMail met en oeuvre un nouveau Concept de Sécurité Globale - www.caramail.com