[Insight-users] Weights during registration and meansquares metric

[Karthik Krishnan]

Take a look at the source code of the metric and subclass it. Add teh
ability to specify a weight image for the fixed and moving images and scale
the difference and derivative by the queried weight voxels from the fixed
weight image and from the transformed location on the moving weight image.

If you are using mean squares metric, this should be equivalent to
multiplying the fixed and moving images by their weight images and
performing registration on the resulting weighted images. The Value would
end up being scaled by the weight. The Derivative would end up getting
scaled by Weight^2.

--
karthik

On Tue, Feb 15, 2011 at 2:43 PM, lpaul <l.paul at uclouvain.be> wrote:

>
> Hi all,
>
> I am using the ImageToImageRegistration for a while and I would like to
> improve the computation to target some particular regions into the volume.
> Typically, I some regions should be preponderant in the computation of the
> metric. Is it possible to give some weights to the voxels belonging to
> these
> zones?
> Is there already something that does the job in ITK?
> Any suggestion on implementing this in an inherited class from MeanSquares
> metric?
>
> Thanks, Laurent.
> --
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