[Insight-users] MutualInformationImageToImageMetric

[Karthik Krishnan]

Most metrics provide a GetValue and a GetDerivative and/or a
GetValueAndDerivative method. It is up to the optimizer that is plugged
into the registration process to decide what to use.

For instance the GradientDescentOptimzers use the derivative to guide
the transform parameters. The 1+1 evolutionary optimizers use the
GetValue methods and do not use the derivatives.

HTH
karthik

On Tue, 2005-08-09 at 13:13 +0100, Yan Yang wrote:
> Hi All,
>  
> I have a question about MutualInformationImageToImageMetric. It seems
> that the value of the metric (Mutual Information) doesn't affect the
> transform parameters, only the image derivative contributes to the
> transform. so how to make the metric contribute to the registration
> process?
>  
> Thanks in advance!
>  
> Kind regards,
>  
> Yan
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