[ITK] [ITK-users] CommandIterationUpdate optimizer position reporting

[Andrew Harris]

Hello,
I'm attempting to track the movement of images under registration using
various optimizers.  I have a CommandIterationUpdate observer set up to
write the optimizer positions to file, and when I use a Gradient Descent or
Powell optimizer I get a vector for the translation applied using
optimizer->GetCurrentPosition(), however if I use the LBFGSB optimizer I
get zero vectors all the way down (it returns the correct result though).
Is the functionality of GetCurrentPosition() different in the LBFGSB
optimizer than the others?

--

AH


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