[vtkusers] vtkLandmarkTransform incorrect results?

[David Gobbi]

On Tue, Nov 10, 2009 at 11:59 AM, David Doria <daviddoria+vtk at gmail.com> wrote:
> On Tue, Nov 10, 2009 at 11:06 AM, David Gobbi <david.gobbi at gmail.com> wrote:
>> Hi David,
>>
>> The vtkLandmarkTransform requires that the two sets of vtkPoints are
>> homologous with each other, i.e. they must each represent the same set
>> of landmarks listed in the same order.  Using it to register polydata
>> by taking the points from each data set is a bad idea, since the
>> points are probably not going to be homologous.  You should use
>> iterative closest point instead.
>>
>>    David
>
> One was created by the vtkConeSource and the other was created by
> applying a TransformFilter to that source. The points should (I'd
> imagine) therefore be homologous. I have it working by selecting three
> landmarks (maybe more reasonable anyway), but Sven brought up a good
> point (off list) that this particular example didn't work and we both
> think it should.
>
> Any more thoughts?

I'll test if you can provide the matrix that you expect to get from the data
sets that you provided.

    David