驗證碼識別技術研究（2）

 1 /// <summary> 2         /// 擷取主體矩形邊界座標，順時針 3         /// </summary> 4         /// <param name="bmpTg">靶心圖表片</param> 5         /// <param name="bmpMT">模板圖片</param> 6         /// <returns></returns> 7         private static Point[] GetTarget(Bitmap bmpTg, Bitmap bmpMT) 8         { 9             //主體矩形邊界座標,順時針10             Point[] points ={11                 new Point(0,0),12                 new Point(0,0),13                 new Point(0,0),14                 new Point(0,0),15                            };16 17             int tmpRGB = 0;18             for (int tgx = 0; tgx < bmpTg.Width - bmpMT.Width; tgx++)19             {20                 for (int tgy = 0; tgy < bmpTg.Height - bmpMT.Height; tgy++)21                 {22                     bool faild = false;23                     for (int mtx = 0; mtx < bmpMT.Width; mtx++)24                     {25                         for (int mty = 0; mty < bmpMT.Height; mty++)26                         {27                             if (bmpMT.GetPixel(mtx, mty).B > 150)28                                 continue;29                             tmpRGB = bmpTg.GetPixel(tgx + mtx, tgy + mty).B - bmpMT.GetPixel(mtx, mty).B;30                             tmpRGB = tmpRGB > 0 ? tmpRGB : tmpRGB * (-1);31                             if (tmpRGB > 150)32                             {33                                 faild = true;34                                 continue;35                             }36                         }37                     }38                     if (faild)39                     {40                         continue;41                     }42                     points[0].X = tgx;43                     points[0].Y = tgy;44                     points[1].X = tgx + bmpMT.Width;45                     points[1].Y = tgy;46                     points[2].X = tgx;47                     points[2].Y = tgy + bmpMT.Height;48                     points[3].X = tgx + bmpMT.Width;49                     points[3].Y = tgy + bmpMT.Height;50                     return points;51                 }52             }53             return points;54         }