[Insight-developers] Stopping a level set filter mid-iteration?

[Zachary Pincus]

Hello all,

Is there a "proper" way to stop a level set filter (or, more generally, 
a subclass of itk::FiniteDifferenceImageFilter) midway through its 
iterations, via an observer object?

Some optimizers have a StopOptimization() method for precisely this 
purpose, for example. Is there anything similar for 
FiniteDifferenceImageFilter subclasses? (I could just set MaxIterations 
to CurrentIterations from the observer object, I guess.)

If there isn't any such mechanism, should there be? I'll happily add 
such a method to FiniteDifferenceImageFilter (after, of course, filing 
a bug in the bugtracker) if people agree.

Zach Pincus

Department of Biochemistry and Program in Biomedical Informatics
Stanford University School of Medicine