/// <summary>
/// Computes convex hull for a set of 2D points.
/// </summary>
/// <param name="points">The input 2D point set, represented by CV_32SC2 or CV_32FC2 matrix</param>
/// <param name="clockwise">If true, the output convex hull will be oriented clockwise,
/// otherwise it will be oriented counter-clockwise. Here, the usual screen coordinate
/// system is assumed - the origin is at the top-left corner, x axis is oriented to the right,
/// and y axis is oriented downwards.</param>
/// <returns>The output convex hull. It is a vector of 0-based point
/// indices of the hull points in the original array (since the set of convex hull
/// points is a subset of the original point set).</returns>
public int[] ConvexHullIndices(InputArray points, bool clockwise = false)
{
var dst = new MatOfInt();
Cv2.ConvexHull(points, dst, clockwise, false);
return dst.ToArray();
}