/// <summary>

        /// 将图像缩小N倍

        /// </summary>

        /// <param name="source">原图数据</param>

        /// <param name="height">原图高度</param>

        /// <param name="width">原图宽度</param>

        /// <param name="scale">缩小倍数</param>

        /// <returns></returns>

        public static ushort[] ImgNarrow(ushort[] source, int height, int width,int scale)

        {

            if (Convert.ToBoolean(height % scale) || Convert.ToBoolean(width % scale))

            {

                throw new Exception("高宽必须为" + scale + "的倍数");

            }

            ushort[] dest = new ushort[height * width / (scale * scale)];

            int n = ;

            for (int y = ; y < height; y = y + scale)

            {

                for (int x = ; x < width; x = x + scale)

                {

                    int index = y * width + x;

                    int sum = ;

                    for (int i = ; i < scale; i++)

                    {

                        for (int j = ; j < scale; j++)

                        {

                            sum += source[index + i * width + j];

                        }

                    }

                    dest[n] = Convert.ToUInt16(sum / (scale * scale));

                    n++;

                }

            }

            return dest;

        }