[Insight-users] How to choose an optimizer for Historgramimagetoimagemetric

[Karthik Krishnan]

On Wed, 2005-10-12 at 22:33 +0800, =?GB2312?Q?=D7=AF=CF=C5=BA=A3(Xiahai
Zhuang)?= wrote:
> insight-users-request at itk.org，您好！ 
>  
>   I found that the derived class of  HistogramImageToImageMetric, such
> as: MutualInformationHistogramImageToImageMetric
> and NormalizedMutualInformationHistogramImageToImageMetric, has no
> method of GetDerivate(). Does this mean that  we
> could not apply RegularStepsGradientDescentOptimizer as an optimzer to
> registration work when using such metric.

You can. The derivative is computed by the superclass,
HistogramImageToImageMetric via finite differences.

>  Is there 
> any prinprle for one metric to choose a propriate optimizer.

Take a look at the software guide.

>  
>  Thinks a lot :)
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