Hi, I do not understand this message error: cannot convert parameter 1 from 'class itk::SmartPointer<class itk::Image<class itk::RGBPixel<unsigned char>,2> >' to 'class itk::Image<class itk::RGBPixel<class itk::RGBPixel<unsigned char> >,2> *' At this place I do a SetInput() Thank you, Gwen