C#联通新版验证码识别的实现

public String GetCheckString(Bitmap bitmap) {
           UnCodebase ud = new UnCodebase(bitmap);
           ud.GrayByPixels();
           ud.ClearPicBorder(2);
           ud.CutMap(14, 15, 0, 0);
           bitmap = ud.bmpobj;
         //  bitmap = ud.ClearNoise(128, 1);
           String chkcode = "";
           Bitmap[] arrmap = ud.SplitImg(bitmap, 4, 1);
           foreach (Bitmap item in arrmap) {
               String str = ud.GetCodebybitmap(item, 128);
               Boolean isEques = false;
               foreach (String strss in code) {
                   String[] a = strss.Split(':');
                   if (str == a[1]) {
                       chkcode += a[0];
                       isEques = true;
                       break;
                   }
               }
               if (!isEques) {
                   String strCurrent = "";
                   double max = 0.0;
                   foreach (String strss in code) {
                       int len1, len2, min, count = 0;
                       String[] a = strss.Split(':');
                       len1 = a[1].Length;
                       len2 = str.Length;
                       min = len1;
                       if (min > len2) {
                           min = len2;
                       }
                       for (int i = 0; i < min; i++) {
                           if (str[i] == a[1][i]) {
                               count++;
                           }
                       }
                       double currrent = (count * 100.0 / min);
                       if (max < currrent) {
                           max = currrent;
                           strCurrent = a[0].Trim();
                       }
                   }
                   chkcode += strCurrent.Trim();
               }
           }
           return chkcode;
       }

转自:http://www.cnblogs.com/ningqhai/p/3684318.html