Function box_intersection_over_union

dlib/image_processing/box_overlap_testing.h:15–25

// ----------------------------------------------------------------------------------------

    inline double box_intersection_over_union (
        const drectangle& a,
        const drectangle& b
    ) 
    {
        const double inner = a.intersect(b).area();
        if (inner == 0)
            return 0;
        const double outer = a.area() + b.area() - inner;
        return inner / outer;
    }

// ----------------------------------------------------------------------------------------