C#實現驗證碼識別

 這個可能是最簡單的嚴整碼了..

 

 

 

使用

 

 System.Net.WebClient _Client =new System.Net.WebClient();
            byte[] _ImageBytes =_Client.DownloadData("http://www.fjjj.gov.cn/Article/getcode.asp");

            MemoryStream _Memory = new MemoryStream(_ImageBytes);
            Bitmap _OldBitmap = (Bitmap)Image.FromStream(_Memory);
            pictureBox1.Image = _OldBitmap;

            this.Text = GetCodeText(_OldBitmap);

 

全部代碼

 

  /// <summary> /// 獲取驗證碼 /// </summary> /// <param name="p_Bitmap">圖形 http://www.fjjj.gov.cn/Article/getcode.asp</param> /// <returns>數值</returns> public static string GetCodeText(Bitmap p_Bitmap) { int _Width = p_Bitmap.Width / 4; int _Height = p_Bitmap.Height; Bitmap[] _Bitmap = new Bitmap[4]; Rectangle _Rectangle = new Rectangle(); _Rectangle.Width = _Width; _Rectangle.Height = _Height; for (int i = 0; i != _Bitmap.Length; i++) { _Bitmap[i] = p_Bitmap.Clone(_Rectangle, p_Bitmap.PixelFormat); _Rectangle.X += _Width; } int _Value1 = Array.IndexOf(_TextBytes, GetImageText(_Bitmap[0])); int _Value2 = Array.IndexOf(_TextBytes, GetImageText(_Bitmap[1])); int _Value3 = Array.IndexOf(_TextBytes, GetImageText(_Bitmap[2])); int _Value4 = Array.IndexOf(_TextBytes, GetImageText(_Bitmap[3])); string _Value = _Value1 == -1 ? "?" : _Value1.ToString(); _Value += _Value2 == -1 ? "?" : _Value2.ToString(); _Value += _Value3 == -1 ? "?" : _Value3.ToString(); _Value += _Value4 == -1 ? "?" : _Value4.ToString(); return _Value; } private static string[] _TextBytes = new string[] { "E17BEFBDF7DE7BEFBDF7DE87FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "FBE3BFFFFEFBEFBFFFFEFB83FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "E17BFFFDF7EFDFBF7FFFFE03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "E17BFFFDF7E37FFFFDF7DE87FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "EF9FBFFEFAEDBB0FFCFBEF1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "C0FBEFBFFFE07FFFFDF7DE87FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "E3F7EFBFFFE273EFBDF7DE87FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "C07BFFFEFBF7DFBFFFFEFDF7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "E17BEFBDF7E17BEFBDF7DE87FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "E17BEFBDF7CE47FFFDF7EFC7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF" }; /// <summary> /// 獲取二值化數據 /// </summary> /// <param name="p_Bitmap">圖形</param> /// <returns>二值化數據</returns> public static string GetImageText(Bitmap p_Bitmap) { int _Width = p_Bitmap.Width; int _Height = p_Bitmap.Height; BitmapData _Data = p_Bitmap.LockBits(new Rectangle(0, 0, _Width, _Height), ImageLockMode.ReadOnly, p_Bitmap.PixelFormat); byte[] _DataByte = new byte[_Data.Stride * _Height]; Marshal.Copy(_Data.Scan0, _DataByte, 0, _DataByte.Length); BitArray _Bitarray = new BitArray(_DataByte.Length, true); int _Index = 0; for (int i = 0; i != _Height; i++) { int _WidthStar = i * _Data.Stride; for (int z = 0; z != _Width; z++) { if (_DataByte[_WidthStar + (z * 3)] == 238 && _DataByte[_WidthStar + (z * 3) + 1] == 238 && _DataByte[_WidthStar + (z * 3) + 2] == 238) { _Bitarray[_Index] = true; } else { _Bitarray[_Index] = false; } _Index++; } } p_Bitmap.UnlockBits(_Data); int _ByteIndex =_Bitarray.Count / 8; if (_Bitarray.Count % 8 != 0) _ByteIndex++; byte[] _Temp =new byte[_ByteIndex]; _Bitarray.CopyTo(_Temp, 0); return BitConverter.ToString(_Temp).Replace("-", ""); }