I have created an unstructuredGrid and passed it into vtkResampleToImage filter in order to sample its point and cell data on to a uniform grid of points.
Now I want to write this output as a 3D image volume i.e. in .mhd format. I have tried it as below code, but it generated an empty file with only the header.
How can I save the vtkResampleToImage fitler output as .mhd format ?
vtkSmartPointer<vtkUnstructuredGridReader> reader = vtkSmartPointer<vtkUnstructuredGridReader>::New(); reader->SetFileName(ref_volumetric_mesh_path.c_str()); reader->ReadAllScalarsOn(); reader->SetReadAllScalars(true); reader->Update(); vtkSmartPointer<vtkResampleToImage> filter = vtkSmartPointer<vtkResampleToImage>::New(); filter->SetInputDataObject(reader->GetOutput()); filter->SetInputConnection(reader->GetOutputPort()); filter->SetSamplingDimensions(60, 60, 100); filter->Update(); vtkSmartPointer<vtkMetaImageWriter> writer = vtkSmartPointer<vtkMetaImageWriter>::New(); writer->SetFileName(ref_volumetric_mesh_voxelized_path.c_str()); writer->SetInputData(filter->GetOutput()); writer->Write();