    CImg<Tfloat> get_blur_box(const float boxsize, const unsigned int boundary_conditions=1) const {
      return CImg<Tfloat>(*this,false).blur_box(boxsize,boundary_conditions);
    }
    CImg<Tfloat> get_blur_box(const float boxsize, const unsigned int boundary_conditions=1) const {
      return CImg<Tfloat>(*this,false).blur_box(boxsize,boundary_conditions);
    }