Win8 Metro(C#)数字图像处理--3.5图像形心计算

/// <summary>
        /// Get the center of the object in an image.
        /// </summary>
        /// <param name="src">The source image.</param>
        /// <returns></returns>
        public static int[] CenterPoints(WriteableBitmap src)
        {
            if (src != null)
            {
                int[] Centerpoint = new int[2];
                int M00 = 0, M01 = 0, M10 = 0;
                int w = src.PixelWidth;
                int h = src.PixelHeight;
                int b=0,g=0,r=0;
                byte[] temp = src.PixelBuffer.ToArray();
                for (int y = 0; y < h; y++)
                {
                    for (int x = 0; x < w * 4; x += 4)
                    {
                        b = temp[x + y * w * 4];
                        g = temp[x + 1 + y * w * 4];
                        r = temp[x + 2 + y * w * 4];
                        if (r + g + b != 0)
                        {
                            M00++;
                            M01 += y;
                            M10 += x;
                        }
                    }                   
                }
                Centerpoint[0] = (int)(M10 / M00);
                Centerpoint[1] = (int)(M01 / M00);
                return Centerpoint;
            }
            else
            {
                return null;
            }   
        }