[Insight-users] Multi-resolution registration framework for deformable registration using BSplines

[Lydia Ng]

 Siddharth,

In the past the couple I have tried when I go from level to level is to
 - increase the bspline grid (i.e. start with a coarse grid and refine at
each level)
 - decrease the CostFunctionConvergenceFactor (i.e. make the optimizer
convergence more stringent at each level)

HTH,
 Lydia

On 5/3/06, Siddharth Vikal <siddharthvikal at gmail.com> wrote:

> Hello,
>
> I'm trying to perform deformable registration of two MRI volume
> datasets using Bsplines deformation model.
>
> I went through really nicely explained examples of registration. There
> are examples on bspline based registration and multi-res framework
> based registration independently. In Bspline example, the optimizer
> used is LBFGSB.
>
> So, I was wondering what parameters of this optimizer could be changed
> at different resolution levels of registration? (considering in
> MultiRes example, the max and min. step length of
> RegularStepGradientDescent optimizer are modified analogously).
>
> Looking forward for advices.
>
> regards
> siddharth
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