    CImg<Tfloat> get_normalize(const T& min_value, const T& max_value,
                               const float ratio_if_constant_image=0) const {
      return CImg<Tfloat>(*this,false).normalize((Tfloat)min_value,(Tfloat)max_value,ratio_if_constant_image);
    }
    CImg<Tfloat> get_normalize(const T& min_value, const T& max_value,
                               const float ratio_if_constant_image=0) const {
      return CImg<Tfloat>(*this,false).normalize((Tfloat)min_value,(Tfloat)max_value,ratio_if_constant_image);
    }