[ITK-users] [ITK] LBFGSBOptimizerv4 step size

[Dženan Zukić]

I guess there are a few stopping criteria, by looking at the public
functions <https://itk.org/Doxygen/html/classitk_1_1LBFGSBOptimizerv4.html>:
SetCostFunctionConvergenceFactor - probably examines changes in cost
function value
SetMaximumNumberOfCorrections - sounds like iteration count
There is probably also some implicit epsilon-like criterion on position
changes.

Regards,
Dženan


On Wed, Dec 14, 2016 at 2:38 PM, Andrew Harris <aharr8 at uwo.ca> wrote:

> Thanks for getting back to me.  Do you have any idea what the stopping
> criteria is for the Broyden-Fletcher implementation?
>
> --
>
> AH
>
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> On Wed, Dec 14, 2016 at 2:32 PM, Dženan Zukić <dzenanz at gmail.com> wrote:
>
>> There is no mention of step size in source code of this optimizer. It
>> probably does not use fixed step size.
>>
>> Regards
>>
>> On Wed, Dec 14, 2016 at 10:21 AM, Andrew Harris <aharr8 at uwo.ca> wrote:
>>
>>> Hello, hopefully someone can point me in the right direction.  I have
>>> been trying to use a LBFGSBOptimizerv4 with some ultrasound images to do a
>>> rigid 3D versor transform registration, but can't find anywhere that either
>>> allows me to set the step size for the optimizer or documents what the step
>>> size is. Does anyone have a reference for this?
>>>
>>> --
>>>
>>> AH
>>>
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