wif->SetInputBufferTypeToRGB();
wif->ReadFrontBufferOff();
wif->Update();
vtkPNGWriter *writer = vtkPNGWriter::New();
writer->SetFileName( bbGetInputFileName().c_str() );
wif->SetInputBufferTypeToRGB();
wif->ReadFrontBufferOff();
wif->Update();
vtkPNGWriter *writer = vtkPNGWriter::New();
writer->SetFileName( bbGetInputFileName().c_str() );