Hi Raffaele, I have made some changes and the code now compiles with VC++ 2005. I believe that your error was to define the template parameter for BlurGaussSelective class. You wrote this: BlurGaussSelective<ViewType,ViewType> filter; but this is correct: BlurGaussSelective< any_image<ImageType>::const_view_t, any_image<ImageType>::const_view_t > filter; Also, you don't need two template parameters. Please review the code below and let me know if you have questions or remarks. #include <boost\cstdint.hpp> #include <boost\gil\gil_all.hpp> #include <boost\gil\extension\io\jpeg_dynamic_io.hpp> #include <boost\gil\extension\dynamic_image\dynamic_image_all.hpp> using namespace std; using namespace boost; using namespace gil; template <typename TView> class Filter { public: virtual ~Filter(); virtual void setParameter(uint8_t id, float value); virtual void apply( TView& source, TView& destination) = 0; protected: Filter(); }; template <typename TView > class BlurGaussSelective : public Filter<TView> { public: BlurGaussSelective(); virtual ~BlurGaussSelective(); void setParameter(uint8_t id, float value); void apply( TView& source, TView& destination ); }; int main(int argc, char* argv[]) { typedef mpl::vector<rgb8_image_t,gray8_image_t> ImageType; typedef mpl::vector<rgb8_view_t,gray8_view_t> ViewType; any_image<ImageType> source; any_image<ImageType> dest; jpeg_read_image("input.jpg", source); jpeg_read_image("input.jpg", dest); BlurGaussSelective< any_image<ImageType>::const_view_t > filter; filter.apply(const_view(source),const_view(dest)); } Regards, Christian