<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:13px"><div><div><div><div>Hi,<br><br></div>I am having issues applying landmarks to FEM registration and would appreciate any help to resolve it. <br><br></div>I am following the example in RegistrationITKv4/DeformableRegistration11 with the following modification:<br><br> //Add landmartks<br> RegistrationType::PointType SourceLandmark;<br> RegistrationType::PointType TargetLandmark;<br><br>SourceLandmark[0] = 23;SourceLandmark[1] = 12;SourceLandmark[2] = 41;<br> TargetLandmark[0] = 26;TargetLandmark[1] = 16;TargetLandmark[2] = 45;<br> registrationFilter->AddLandmark(SourceLandmark,TargetLandmark);<br><br>registrationFilter->SetUseLandmarks(true);<br><br><br></div>I get a run time error: "Vector subscript out of range".<br><br></div>The call stack is as follows:<br>>   msvcp90d.dll!std::_Debug_message(const wchar_t * message=0x000000013fa48fc8, const wchar_t * file=0x000000013fa49010, unsigned int line=779) Line 24   C++<br>    HybridRegistration.exe!std::vector<itk::fem::Element const * __ptr64,std::allocator<itk::fem::Element const * __ptr64> >::operator[](unsigned __int64 _Pos=0) Line 780   C++<br>    HybridRegistration.exe!itk::fem::FEMRegistrationFilter<itk::Image<float,3>,itk::Image<float,3>,itk::fem::FEMObject<3> >::ApplyLoads(itk::Size<3> ImgSz={...}, double * scaling=0x0000000000000000) Line 410 + 0x35 bytes   C++<br>    HybridRegistration.exe!itk::fem::FEMRegistrationFilter<itk::Image<float,3>,itk::Image<float,3>,itk::fem::FEMObject<3> >::MultiResSolve() Line 1173   C++<br>    HybridRegistration.exe!itk::fem::FEMRegistrationFilter<itk::Image<float,3>,itk::Image<float,3>,itk::fem::FEMObject<3> >::RunRegistration() Line 169   C++<br>    HybridRegistration.exe!main(int argc=1, char * * argv=0x0000000002546b40) Line 225   C++<br>    HybridRegistration.exe!__tmainCRTStartup() Line 586 + 0x19 bytes   C<br>    HybridRegistration.exe!mainCRTStartup() Line 403   C<br><br><br></div><span style="font-family:arial,sans-serif;font-size:13px">Thanks</span><br><div><span style="font-family:arial,sans-serif;font-size:13px">Vikas</span></div></div>