[函数名称]

  二值图像投影         ImageProjection(WriteableBitmap src)

[算法说明]

[函数代码]

<pre class="csharp" name="code">        /// <summary>
        /// Get projections of X and Y direction. 
        /// </summary>
        /// <param name="src">The source image.</param>
        /// <returns></returns>
        public static int[][] ImageProjection(WriteableBitmap src)////二值图像投影
        {
            if (src != null)
            {
                int w = src.PixelWidth;
                int h = src.PixelHeight;
                int[][] Centerpoint = new int[2][];
                Centerpoint[0] = new int[w+1];
                Centerpoint[1] = new int[h+1];
                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)
                        {
                            Centerpoint[1][y]++;
                        }
                    }
                }
                for (int x = 0; x < w * 4; x += 4)
                {
                    for (int y = 0; y < h; y++)
                    {
                        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)
                        {
                            Centerpoint[0][(int)(x/4)]++;
                        }
                    }
                }
                return Centerpoint;
            }
            else
            {
                return null;
            }
        }