C# 实现验证码识别

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO;using System.IO.Compression;namespace AuctionLicenseSH{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { //this.buttonOcrTip.PerformClick(); this.buttonOcrTarget.PerformClick(); } private void buttonOcrTip_Click(object sender, EventArgs e) { Cracker cracker; int indexCount = 0; int indexSuccess = 0; int indexFail = 0; string outMessage = ""; DirectoryInfo dir; //识别语义 indexCount = 0; indexSuccess = 0; indexFail = 0; cracker = new Cracker(".//template_tip"); cracker.OcrRate = 0.8; dir = new DirectoryInfo(".//tip"); foreach (FileInfo f in dir.GetFiles()) { DateTime start = DateTime.Now; string fileFullPath = f.FullName; Bitmap img = new Bitmap(fileFullPath); var result = cracker.Read(img); string fileName = f.FullName.Substring(f.FullName.LastIndexOf('\\') 1); string fileNameWithoutPostFix = fileName.Substring(0, fileName.LastIndexOf('.')); //去除后缀 string SuccessOrFail; if (result.Length >0 && result.Substring(0, 1) == fileNameWithoutPostFix.Substring(0, 1)) //只需比第一个字符 { indexSuccess ; SuccessOrFail = "成功" indexSuccess.ToString(); } else { indexFail ; SuccessOrFail = "失败" indexFail.ToString(); } DateTime stop = DateTime.Now; TimeSpan time = stop.Subtract(start); int iEclapse = time.Seconds * 1000 time.Milliseconds; indexCount ; outMessage = indexCount.ToString() "," SuccessOrFail "," fileName "," result.ToString() "," iEclapse.ToString() "毫秒" Environment.NewLine; img.Dispose(); } this.textBox1.Text = outMessage; } private void buttonOcrTarget_Click(object sender, EventArgs e) { Cracker cracker; cracker = new Cracker(".//template_target", Cracker.enumOcrType.OcrTarget); cracker.OcrRate = 0.5; int indexCount = 0; int indexSuccess = 0; int indexFail = 0; string outMessage = ""; DirectoryInfo dir; //识别数字 dir = new DirectoryInfo(".//target"); foreach (FileInfo f in dir.GetFiles()) { DateTime start = DateTime.Now; string fileFullPath = f.FullName; Bitmap img = new Bitmap(fileFullPath); var result = cracker.Read(img); string fileName = f.FullName.Substring(f.FullName.LastIndexOf('\\') 1); string fileNameWithoutPostFix = fileName.Substring(0, fileName.LastIndexOf('.')); //去除后缀 string SuccessOrFail; if (result == fileNameWithoutPostFix) { indexSuccess ; SuccessOrFail = "成功" indexSuccess.ToString(); } else { indexFail ; SuccessOrFail = "失败" indexFail.ToString(); } DateTime stop = DateTime.Now; TimeSpan time = stop.Subtract(start); int iEclapse = time.Seconds * 1000 time.Milliseconds; indexCount ; outMessage = indexCount.ToString() "," SuccessOrFail "," fileName "," result.ToString() "," iEclapse.ToString() "毫秒" Environment.NewLine; img.Dispose(); } this.textBox1.Text = outMessage; } } public class Cracker { public enum enumOcrType { /// <summary> /// 识别提示 /// </summary> OcrTip, /// <summary> /// 识别数字 /// </summary> OcrTarget, } public class CharInfo { public char Char { get; private set; } public bool[,] Table { get; private set; } public CharInfo(char ch, bool[,] table) { Char = ch; Table = table; } } private class MatchedChar { public int X { get; set; } public int Y { get; set; } public char Char { get; set; } public double Rate { get; set; } } public List<CharInfo> words_ = new List<CharInfo>(); /// <summary> /// 识别率 /// </summary> private double _OcrRate; public double OcrRate { get { return _OcrRate; } set { _OcrRate = value; } } private enumOcrType _OcrType; public AuctionLicenseSH.Cracker.enumOcrType OcrType { get { return _OcrType; } set { _OcrType = value; } } public Cracker(string templatePath, enumOcrType OcrType = enumOcrType.OcrTip) { _OcrType = OcrType; _OcrRate = 0.5; var bytes = new byte[] { 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0xc5, 0x58, 0xd9, 0x92, 0x13, 0x31, 0x0c, 0x94, 0x9e, 0x93, 0x0c, 0x61, 0x97, 0x2f, 0xe1, 0x58, 0xe0, 0x91, 0x9b, 0x82, 0x62, 0x0b, 0x58, 0xee, 0xff, 0xff, 0x10, 0xd8, 0xcc, 0xc8, 0xea, 0x96, 0x6c, 0x8f, 0x13, 0x48, 0xe1, 0xaa, 0x4d, 0x46, 0x96, 0x6d, 0xb5, 0x8e, 0x96, 0x67, 0x73, 0x7f, 0x3b, 0x09, 0x0e, 0x25, 0x41, 0x49, 0xa3, 0xae, 0xd7, 0x5b, 0xa9, 0xa8, 0xd5, 0xb4, 0x76, 0x02, 0x6a, 0x5c, 0x52, 0x94, 0x54, 0xed, 0x18, 0x5a, 0x7f, 0x18, 0x00, 0x00, 0x84, 0x07, 0x1b, 0x80, 0x4a, 0x9a, 0x08, 0x35, 0xb8, 0x81, 0x50, 0xe7, 0xad, 0xbe, 0xc4, 0x8e, 0xb1, 0x4f, 0x2d, 0x5f, 0xba, 0x80, 0xbb, 0xfd, 0x9a, 0xad, 0x19, 0x36, 0xe5, 0xad, 0x87, 0xf1, 0x10, 0xc0, 0x8d, 0xc6, 0x50, 0x40, 0x52, 0xf8, 0xb3, 0x98, 0x2c, 0xd6, 0xec, 0x59, 0xe7, 0x0d, 0x3e, 0x0f, 0x93, 0x3e, 0x1d, 0x02, 0x7a, 0x18, 0x8f, 0xb6, 0xc7, 0x46, 0x4e, 0x01, 0xa3, 0x96, 0xdc, 0x3a, 0x20, 0x77, 0xbf, 0x2c, 0x24, 0xe4, 0x80, 0xa9, 0x20, 0x14, 0xe5, 0x2d, 0xb5, 0x68, 0xc9, 0x55, 0x89, 0x23, 0x96, 0x82, 0xaa, 0xba, 0x58, 0xa6, 0x03, 0x38, 0x71, 0x4b, 0x29, 0xd2, 0x47, 0x80, 0xe3, 0x84, 0x91, 0xf4, 0x78, 0x43, 0x64, 0x41, 0x7b, 0x73, 0x99, 0x80, 0x42, 0x48, 0x00, 0xde, 0x00, 0x12, 0x88, 0x80, 0xdb, 0x51, 0x4a, 0x49, 0x84, 0x43, 0xf6, 0x51, 0x90, 0x27, 0x21, 0xc9, 0xf8, 0xac, 0x00, 0x4d, 0xcd, 0x46, 0x09, 0x9d, 0x15, 0x78, 0xe0, 0x00, 0x1e, 0x44, 0x2a, 0x51, 0x8c, 0xbc, 0xd3, 0xa3, 0x68, 0x8a, 0xd5, 0x3a, 0x20, 0x79, 0xba, 0x4d, 0x71, 0x4c, 0x0b, 0x91, 0x98, 0x90, 0x7b, 0x2a, 0x42, 0xc5, 0x78, 0x7a, 0xfc, 0xd5, 0x1b, 0x4b, 0x09, 0xa7, 0x27, 0x99, 0x38, 0x05, 0x01, 0xc2, 0x80, 0x39, 0x9c, 0x67, 0xbb, 0x4e, 0x7f, 0x6c, 0x33, 0xdd, 0xed, 0x87, 0x55, 0xda, 0x5d, 0xb5, 0x56, 0x33, 0xc6, 0xf9, 0xea, 0x60, 0x64, 0xcf, 0xa7, 0x41, 0xe0, 0x5c, 0x1c, 0xc4, 0xb2, 0x25, 0xa3, 0x89, 0x88, 0x8d, 0x16, 0x00, 0xb5, 0xed, 0xa5, 0x22, 0x9d, 0x52, 0x41, 0x53, 0x8d, 0x92, 0x7f, 0x31, 0x51, 0x3f, 0xa8, 0x00, 0x85, 0x8a, 0x71, 0x10, 0x92, 0x78, 0xc4, 0x59, 0x08, 0x39, 0x69, 0xa9, 0x38, 0x41, 0x48, 0xf7, 0x40, 0x5a, 0x03, 0xd5, 0x3a, 0xf5, 0xe5, 0x9d, 0x33, 0x66, 0xc3, 0xd7, 0x1f, 0xef, 0x94, 0xa0, 0x53, 0xea, 0xf4, 0x15, 0xb2, 0x1c, 0x40, 0x2d, 0xcf, 0xaf, 0xce, 0xe9, 0xd4, 0x7a, 0x89, 0x09, 0xe6, 0xdd, 0xdb, 0x0e, 0xb8, 0x58, 0xa7, 0x60, 0x37, 0xfd, 0xf2, 0xfa, 0x2c, 0x4e, 0x51, 0x87, 0x0d, 0xfc, 0x16, 0x72, 0x2a, 0x5f, 0xc0, 0x80, 0xf0, 0x54, 0xa7, 0xde, 0xfc, 0x15, 0x8b, 0x9a, 0x36, 0x3a, 0x2c, 0x62, 0xfc, 0xd4, 0x8c, 0x31, 0xb7, 0xea, 0xd7, 0x26, 0xc4, 0xaf, 0x75, 0xea, 0xdb, 0x8b, 0xff, 0x9b, 0x9b, 0x50, 0x7e, 0xfe, 0x15, 0xab, 0x17, 0x2f, 0x96, 0x96, 0xbd, 0xaa, 0x87, 0xdd, 0x77, 0xa3, 0x77, 0xd3, 0x85, 0xf0, 0xe0, 0x58, 0xd5, 0xf6, 0x8c, 0xcd, 0xc4, 0x63, 0x52, 0x12, 0x48, 0x46, 0x0f, 0x93, 0x5a, 0xe3, 0xea, 0x24, 0x67, 0x73, 0x63, 0xa0, 0xdf, 0xdf, 0x3d, 0x67, 0xf6, 0xa9, 0xfc, 0xed, 0x08, 0xe3, 0x82, 0x57, 0x08, 0x35, 0x47, 0x68, 0x9c, 0x01, 0x40, 0x87, 0x8b, 0xbd, 0x0c, 0xb3, 0xf4, 0xe1, 0x72, 0xd7, 0x54, 0x62, 0xfd, 0x40, 0xed, 0x99, 0xa6, 0x7e, 0x2b, 0xe4, 0xb4, 0xc4, 0x62, 0x0d, 0x79, 0xae, 0x1b, 0xd7, 0xf4, 0x09, 0xb7, 0xe1, 0x7c, 0x44, 0x09, 0x9a, 0xda, 0xff, 0x52, 0x6a, 0x3c, 0xe1, 0xc8, 0xd7, 0xbd, 0xbb, 0xbe, 0x37, 0xfc, 0xd6, 0xd5, 0x4e, 0x3c, 0x40, 0x2a, 0x4b, 0x39, 0x1a, 0xbd, 0x2a, 0xcd, 0xc1, 0x18, 0x59, 0x40, 0x62, 0x78, 0xec, 0x63, 0x19, 0x72, 0xf0, 0xcf, 0xf8, 0x38, 0xfa, 0x42, 0x3a, 0xc8, 0x02, 0xec, 0x5b, 0xeb, 0x8d, 0xae, 0xf1, 0x45, 0xdd, 0x32, 0x98, 0x35, 0x3c, 0x9f, 0xa6, 0x3d, 0xce, 0x13, 0xce, 0x94, 0x38, 0x87, 0x00, 0x8d, 0x85, 0xc4, 0x70, 0x17, 0x26, 0x0e, 0xa6, 0x1e, 0x16, 0xcb, 0xbf, 0x52, 0xdf, 0x29, 0x63, 0xc4, 0xf6, 0x8c, 0x35, 0xba, 0xf2, 0xf9, 0x1f, 0xbf, 0x73, 0x1f, 0x91, 0x1b, 0x9e, 0x24, 0x5e, 0x63, 0x22, 0x82, 0x23, 0x05, 0x19, 0xb9, 0x71, 0x73, 0xdc, 0xcf, 0x05, 0x88, 0x94, 0x71, 0xdb, 0xdd, 0x48, 0x10, 0xd5, 0x55, 0xb3, 0x52, 0xc3, 0x1b, 0x01, 0x94, 0x13, 0x74, 0x94, 0x3a, 0x80, 0x2f, 0x39, 0xe2, 0x75, 0x0e, 0xf2, 0xc6, 0x18, 0xdc, 0x46, 0xfc, 0xf3, 0xea, 0x14, 0x80, 0xc1, 0xce, 0x24, 0xee, 0x72, 0xed, 0x94, 0xaf, 0xfb, 0xa9, 0xaa, 0x4a, 0xe0, 0xd4, 0x22, 0xc6, 0xf0, 0x57, 0x1d, 0x8e, 0xd2, 0x90, 0xc6, 0x0c, 0xd3, 0x9a, 0x53, 0xfb, 0xd6, 0xb7, 0xdd, 0x14, 0xd4, 0xbd, 0x41, 0xa7, 0x80, 0x7b, 0x23, 0xfe, 0x34, 0x56, 0x0d, 0x96, 0x46, 0x02, 0xfe, 0xfd, 0xb2, 0x00, 0x5f, 0x01, 0x9c, 0xa0, 0x32, 0x39, 0xd7, 0x90, 0xc2, 0x6c, 0xc7, 0x4e, 0x68, 0x88, 0x7d, 0x9f, 0x9b, 0xcf, 0xa7, 0xbe, 0xa0, 0xfc, 0x18, 0x7d, 0x07, 0x5b, 0xa9, 0xbe, 0x56, 0x1f, 0x67, 0x1a, 0x4a, 0x91, 0x9c, 0x04, 0x38, 0x53, 0x6b, 0x70, 0x68, 0x8f, 0xea, 0xf4, 0x34, 0x87, 0x7f, 0x6e, 0x82, 0xc3, 0xc1, 0xab, 0x40, 0xc4, 0x50, 0x13, 0x0e, 0x33, 0x5d, 0x67, 0x7d, 0x01, 0x1f, 0xdb, 0xc0, 0x7f, 0xed, 0x87, 0x7f, 0xbc, 0x0f, 0x75, 0xe0, 0xa5, 0xba, 0xc0, 0x84, 0x3d, 0x24, 0x04, 0xe0, 0xf1, 0x16, 0x41, 0x3b, 0x74, 0xd2, 0x52, 0xc5, 0xf8, 0x7c, 0x12, 0xfb, 0xe4, 0x37, 0x5b, 0xfb, 0x57, 0x11, 0xa1, 0x18, 0x00, 0x00, }; using (var stream = new MemoryStream(bytes)) using (var gzip = new GZipStream(stream, CompressionMode.Decompress)) using (var reader = new BinaryReader(gzip)) { while (true) { char ch = reader.ReadChar(); if (ch == '\0') break; int width = reader.ReadByte(); int height = reader.ReadByte(); bool[,] map = new bool[width, height]; for (int i = 0; i < width; i ) { for (int j = 0; j < height; j ) { map[i, j] = reader.ReadBoolean(); } } //words_.Add(new CharInfo(ch, map)); } } ReadTemplate(templatePath); } /// <summary> /// 读取字符的模板 /// </summary> /// <param name="fileName"></param> public void ReadTemplate(string folderPath) { DirectoryInfo dir = new DirectoryInfo(folderPath); foreach (FileInfo f in dir.GetFiles()) { Bitmap img = new Bitmap(f.FullName); var table = ToTable(img); int width = img.Width; int height = img.Height; string fileName = f.FullName.Substring(f.FullName.LastIndexOf('\\') 1); char ch = fileName.ToCharArray()[0]; words_.Add(new CharInfo(ch, table)); img.Dispose(); } } public string Read(Bitmap bmp) { var result = string.Empty; var width = bmp.Width; var height = bmp.Height; var table = ToTable(bmp); var next = SearchNext(table, -1); while (next < width - 7) { var matched = Match(table, next); //完成了一次最佳匹配，可以把匹配位置向右推进一大步，若找不到合适的最佳匹配就向右推进一小步。 if (matched.Rate >= _OcrRate) { result = matched.Char; next = matched.X 14; //目前，提示语句只需识别第一个字符 if (_OcrType == enumOcrType.OcrTip) { return result; } } else { next = 1; } } return result; } /// <summary> /// Bitmap做2值化 /// </summary> /// <param name="bmp"></param> /// <returns></returns> private bool[,] ToTable(Bitmap bmp) { var table = new bool[bmp.Width, bmp.Height]; for (int i = 0; i < bmp.Width; i ) { for (int j = 0; j < bmp.Height; j ) { var color = bmp.GetPixel(i, j); table[i, j] = (color.R color.G color.B < 600); } } return table; } /// <summary> /// 逐列扫描，找到有值的第一列 /// </summary> /// <param name="table"></param> /// <param name="start"></param> /// <returns></returns> private int SearchNext(bool[,] table, int start) { var width = table.GetLength(0); var height = table.GetLength(1); for (start ; start < width; start ) for (int j = 0; j < height; j ) if (table[start, j]) return start; return start; } /// <summary> /// 遍历匹配字库，取匹配率最高的 /// </summary> /// <param name="source"></param> /// <param name="start"></param> /// <returns></returns> private MatchedChar Match(bool[,] source, int start) { MatchedChar best = null; foreach (var info in words_) { var matched = ScopeMatch(source, info.Table, start); matched.Char = info.Char; if (best == null || matched.Rate > best.Rate) best = matched; } return best; } /// <summary> /// 扫描缓冲范围内的所有点，作为起始点匹配点，取匹配率最高的 /// </summary> /// <param name="source"></param> /// <param name="target"></param> /// <param name="start"></param> /// <returns></returns> private MatchedChar ScopeMatch(bool[,] source, bool[,] target, int start) { int targetWidth = target.GetLength(0); int targetHeight = target.GetLength(1); int sourceWidth = source.GetLength(0); int sourceHeight = source.GetLength(1); double max = 0; var matched = new MatchedChar(); for (int i = -2; i < 6; i ) { for (int j = -3; j < sourceHeight - targetHeight 5; j ) { double rate = FixedMatch(source, target, i start, j); if (rate > max) { max = rate; matched.X = i start; matched.Y = j; matched.Rate = rate; } } } return matched; } /// <summary> /// 计算，以x0、y0作为原点，匹配的比率 /// </summary> /// <param name="source"></param> /// <param name="target"></param> /// <param name="x0"></param> /// <param name="y0"></param> /// <returns></returns> private double FixedMatch(bool[,] source, bool[,] target, int x0, int y0) { double total = 0; double count = 0; int targetWidth = target.GetLength(0); int targetHeight = target.GetLength(1); int sourceWidth = source.GetLength(0); int sourceHeight = source.GetLength(1); int x, y; //比对每一个像素 for (int i = 0; i < targetWidth; i ) { x = i x0; if (x < 0 || x >= sourceWidth) { continue; //超出范围，则退出 } for (int j = 0; j < targetHeight; j ) { y = j y0; if (y < 0 || y >= sourceHeight) { continue; //超出范围，则退出 } //目标像素有值时，直接比对 if (target[i, j]) { total ; //总值 if (source[x, y]) { count ; //比对上了，加1分 } else { count--; //减1分 } } //目标像素无值时，如果源像素有值，也要减分，但只减半 else if (source[x, y]) { count -= 0.55; } } } return count / total; } /// <summary> /// 测试压缩解压缩 /// </summary> public void testCompressDecompress() { CharInfo charinfo = words_[0]; char ch = charinfo.Char; int width = 12; int height = 14; bool[,] map = charinfo.Table; //测试压缩出第一个字符的模板 byte[] buffer = new byte[171]; buffer[0] = (byte)ch; buffer[1] = (byte)width; buffer[2] = (byte)height; int index = 2; for (int i = 0; i < width; i ) { for (int j = 0; j < height; j ) { index ; if (map[i, j]) { buffer[index] = 0x01; } else { buffer[index] = 0x00; } } } //using (var stream2 = new MemoryStream(buffer)) //using (var gzip2 = new GZipStream(stream2, CompressionMode.Compress)) //压缩 FileStream fstream = new FileStream("compress.txt", FileMode.Create, FileAccess.Write); GZipStream gstream = new GZipStream(fstream, CompressionMode.Compress); BinaryWriter swriter = new BinaryWriter(gstream); swriter.Write(buffer); swriter.Close(); gstream.Close(); fstream.Close(); //解压 FileStream fstream2 = new FileStream("compress.txt", FileMode.Open, FileAccess.Read); GZipStream gstream2 = new GZipStream(fstream2, CompressionMode.Decompress); BinaryReader reader2 = new BinaryReader(gstream2); byte[] bufferDecompress = new byte[171]; for (int i = 0; i < 171; i ) { bufferDecompress[i] = (byte)reader2.ReadByte(); } reader2.Close(); gstream2.Close(); fstream2.Close(); } }}