[Insight-users] Supplying a transform to the metric?

[Bill Lorensen]

There is itk::IdentityTransform.

On Wed, Nov 18, 2009 at 4:02 AM, motes motes <mort.motes at gmail.com> wrote:
> I am working on a little function that given two images computes the
> metric value. In this context I was wondering if the type of transform
> has any influence on the metric value.
>
> Setting up the metric typically looks something like this:
>
>    transform->SetIdentity();
>    metric->SetTransform(transform);
>    metric->SetInterpolator(interpolator);
>    metric->SetFixedImage(imageF);
>    metric->SetMovingImage(imageM);
>    metric->SetFixedImageRegion(region);
>
> Is it true that it does not matter what type of transform is
> specified? I have tried with :
>
>  typedef itk::BSplineDeformableTransform<CoordinateRepType,
> Dimension, SplineOrder>      TransformType;
>  typedef itk::AffineTransform< double, Dimension>
>                       AffineTransformType;
>
> but it does not seem to change the metric value.
>
> If the metric only needs to get the indentity transform, is it
> possible to supply this without using one of the above specific
> transform typedefs?
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