[vtkusers] vtk image iterator

[P B]

Hi,
 
   I am trying to find how to iterate over an image using vtk. The class vtkImageIterator seems interesting but I keep getting an unresolved external error message. I tried testing the code such as given in:
 
/Filtering/Testing/Cxx/TestImageIterator.cxx 
 
 
int ext[6] = { 0, 0, 0, 0, 0, 0 };
vtkImageData *id = vtkImageData::New();
id->SetExtent(ext);
vtkImageIterator<unsigned short *> *it = new vtkImageIterator<unsigned short *>(id, ext);
 
 
The error message is the following:
 
TPS.obj : error LNK2019: unresolved external symbol "public: __thiscall vtkImageIterator<unsigned short *>::vtkImageIterator<unsigned short *>(class vtkImageData *,int *)" (??0?$vtkImageIterator at PAG@@QAE at PAVvtkImageData@@PAH at Z) referenced in function "public: void __thiscall TPS::ExecTPS(class vtkPoints *,class vtkPoints *)" (?ExecTPS at TPS@@QAEXPAVvtkPoints@@0 at Z)
 
Thank you for helping out!
Pascale
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