Calculate mean for vector of points

Question

I have a vector of a 2-dimensional points in OpenCV

std::vector points;

I would like to calculate the mean values for x and

Answer 1

You can use stl's std::accumulate as follows:

cv::Point2f sum = std::accumulate(
    points.begin(), points.end(), // Run from begin to end
    cv::Point2f(0.0f,0.0f),       // Initialize with a zero point
    std::plus()      // Use addition for each point (default)
);
cv::Point2f mean = sum / points.size(); // Divide by count to get mean