[Insight-users] interpretation of the gradient step

[Romain Lebel]

Is that correct that the steplength is the difference of the 
metricvalue  between two iterations?

Romain Lebel a écrit :

> Hi everybody (merry christmas in advance!)
>
> I'm trying to make my registration process faster. I'm using 
> MeanSquares metric and RegularStepGradientDescentOptimizer.
>
> If want to stop the registration process for example when images are 
> registred at one tenth of a pixel.
>
> How can i interpret the current steplength (or maybe another 
> parameter) to have an information like "at how many parts of a pixel 
> my images are registred"?
>
> To summarize i need an information related to the images themselves 
> that i can interpret in order to stop the registration when it reaches 
> a certain satisfaying value. (metrics can take very different value 
> from one couple of image to another so it is difficult to stop using 
> the metric)
>


-- 
Romain Lebel
PhaseView - Telecom Paris
37-39 rue Dareau, 75014 Paris
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