[Insight-users] bug in the example "DeformableRegistration15.cxx" of the itk.4.1.0

[Francisco Oliveira]

Hi everyone,

I have an issue I think is a bug:
In the registration example "DeformableRegistration15.cxx" (itk-4.1.0) 
the bulk transform is not added to the Bsplinedeformation, and there is 
not a method to set the bulk transform.
In a previous version of the ITK (itk-3.20.0), for the same example, 
the bulk transform is added via "SetBulkTransform" method, but instead 
using the class itk::BSplineTransform <CoordinateRepType, 
SpaceDimension, SplineOrder> in that example it is used the class 
itk::BSplineDeformableTransform <CoordinateRepType, SpaceDimension, 
SplineOrder>.
I think this is the reason why the program built based on the 
"DeformableRegistration15.cxx" (itk-4.1.0) crashes when starts the 
Bspline deformation. It gives the following message after complet the 
affine registration:

Starting Deformable Registration Coarse Grid
ExceptionObject caught!
itk::ExceptionObject (00BAF9F8)
Location: "void _thiscall 
itk::MattesMutualInformationImageToImageMetric< class 
itk::Image<short,3>,class itk::Image<short,3> 
 >::GetValueAndDErivative(const class itk::OptimizerParameters<double> 
&,double &,class itk::Array<double> &) const"
File: 
c:\...\modules\registration\common\include\itkMattesMutualInformationImageToImageMetric.hxx
line: 822
Description: itk::ERROR: 
MattesMutualInformationImageToImageMetric(03137C68): Joint PDF summed to 
zero



By using the "DeformableRegistration15.cxx" of the itk-3.20.0 with few 
changes to run in the new itk-4.1.0 the program runs correctly.


Thanks,

Francisco