[Insight-users] spline as a combination of b-splines

[Amy C]

Hi Nick,
Thank you very much! This is exactly what I want. And your explanation about
the knot vectors makes it much clearer.
cheers,
Amy

On Tue, Jan 5, 2010 at 1:40 AM, Nick Tustison <ntustison at wustl.edu> wrote:

> Hi Amy,
>
> A couple things for consideration:
>
> 1)  Instead of modifying the itkBSpline…Filter that is currently in the
> review directory, you could just download the
> itkBSplineControlPointImageFilter class from the N4ITK contribution which
> takes as input, a set of control points and evaluates the B-spline object
> values, derivatives, etc.  I wrote it as a companion class to the original
> scattered data approximation filter.
>
> 2) These classes assume uniform knot spacing where the parametric domain is
> defined by the user-specified image domain.  Thus the user does not specify
> the knot vectors as they are already implied by the assumptions of the
> algorithm.
>
> Let me know if you have any other questions/concerns,
> Nick
>
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