Emgu.CV.PointCollection.EllipseLeastSquareFitting C# (CSharp) Метод

        public static Ellipse EllipseLeastSquareFitting(PointF[] points)
        {
            IntPtr seq = Marshal.AllocHGlobal(StructSize.MCvSeq);
             IntPtr block = Marshal.AllocHGlobal(StructSize.MCvSeqBlock);
             GCHandle handle = GCHandle.Alloc(points, GCHandleType.Pinned);
             CvInvoke.cvMakeSeqHeaderForArray(
            CvInvoke.CV_MAKETYPE((int)CvEnum.MAT_DEPTH.CV_32F, 2),
            StructSize.MCvSeq,
            StructSize.PointF,
            handle.AddrOfPinnedObject(),
            points.Length,
            seq,
            block);
             Ellipse e = new Ellipse(CvInvoke.cvFitEllipse2(seq));

             //The angle returned by cvFitEllipse2 has the wrong sign.
             //Returned angle is clock wise rotation, what we need for the definition of MCvBox is the counter clockwise rotation.
             //For this, we needs to change the sign of the angle
             MCvBox2D b = e.MCvBox2D;
             b.angle = -b.angle;
             if (b.angle < 0) b.angle += 360;
             e.MCvBox2D = b;

             handle.Free();
             Marshal.FreeHGlobal(seq);
             Marshal.FreeHGlobal(block);
             return e;
        }