Hi Erik,<br><br>The BSplineTransform can be initilized directly with an <br>AffineTransform by simply connecting the AffineTransform <br>as its "Bulk" transform.<br><br>Please look at the examples:<br><br>Insight/Examples/Registration/<br>
DeformableRegistration14.cxx<br> DeformableRegistration15.cxx<br> DeformableRegistration8.cxx<br><br><br>Look for the lines:<br><br> transform->SetBulkTransform( affine_transform );<br><br>---<br>
<br>The general problem that you are facing, on the other hand,<br>does not have an easy solution. All Transforms have a <br>different number of parameters. This is simply because the<br>Transform hierarchy is progressively increasing the degrees<br>
of freedom of the transforms.<br><br>You will have to initialize TransformA from TransfromB<br>on a case by case basis.<br><br><br>Regards,<br><br><br> Luis<br><br><br><br>----------------------------------------------------------<br>
<div class="gmail_quote">On Tue, Sep 8, 2009 at 8:11 AM, Erik Tuerke <span dir="ltr"><<a href="mailto:tuerke@cbs.mpg.de">tuerke@cbs.mpg.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5"><br>
<br>
Hello!<br>
<br>
I am writing a registration programm based on itk.<br>
<br>
I want the program to have the following facility: the user is able to set a series of transforms. Considering an affine transform following a non-linear transform(e.g. bspline transform). What i want to do is to pass only the transform gained by the affine transform to the bspline registration step (not the resampled image from the affine registration step).<br>
My problem is, that the regsitration method of the bspline registration step expects a lot more parameters than i get by the affine registration step. Is there a way to convert the affine transform into a, say, bspline transform and pass this transform to the SetInitialTransformParameters method of the registration method which is responsible for the bspline transform?<br>
<br>
<br>
Thanks a lot and best regards!<br>
<br>
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