stddev

stddev.cpp

double contour_average_distance(Mat image, Contour contour)
{
    double average = 0;
    for (Point pt : contour) {
        average += Calculate_Real_Distance(image, pt);
    }
    return average / contour.size();
}

double contour_stddev(Mat image, Contour contour)
{
    double ave_dist = contour_average_distance(image, contour);
    double variance = 0;
    for (Point point : contour) {
        double dist = Calculate_Real_Distance(image, point);
        double diff_mean = ave_dist - dist;
        variance += pow(diff_mean, 2);
    }
    variance = variance / contour.size();
    return sqrt(variance);
}