识别验证码,会的进来看看~~~~~~~~~~~~

Question

http://www.ibc222.com/         目标以这个网站的验证码。

Answer 1

只针对此验证码～！以下是源码
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;namespace DiscernCheckCode
{
    class IbcCheck
    {
        public Bitmap bmpobj;
        public IbcCheck(Bitmap pic)
        {
            bmpobj = new Bitmap(pic);    //转换为Format32bppRgb
        }
           /**/
        /// <summary>
        /// 根据RGB，计算灰度值
        /// </summary>
        /// <param name="posClr">Color值</param>
        /// <returns>灰度值，整型</returns>
        private int GetGrayNumColor(System.Drawing.Color posClr)
        {
            return (posClr.R * 19595 + posClr.G * 38469 + posClr.B * 7472) >> 16;
        }
        /**/
        /// <summary>
        /// 去图形边框
        /// </summary>
        /// <param name="borderWidth"></param>
        public void ClearPicBorder(int borderWidth)
        {
            for (int i = 0; i < bmpobj.Height; i++)
            {
                for (int j = 0; j < bmpobj.Width; j++)
                {
                    if (i < borderWidth || j < borderWidth || j > bmpobj.Width - 1 - borderWidth || i > bmpobj.Height - 1 - borderWidth)
                        bmpobj.SetPixel(j, i, Color.FromArgb(0, 0, 0));
                }
            }
        }
        /// <summary>
        /// 灰度转换
        /// </summary>
        /// <param name="dgClr"></param>
        public void GrayByPixels(int dgClr)
        {
            for (int i = 0; i < bmpobj.Height; i++)
            {
                for (int j = 0; j < bmpobj.Width; j++)
                {
                    if (bmpobj.GetPixel(j, i).R < dgClr)
                    {
                        bmpobj.SetPixel(j, i, Color.FromArgb(0, 0, 0));
                    }
                    else
                    {
                        bmpobj.SetPixel(j, i, Color.FromArgb(255, 255, 255));
                    }
                }
            }
        }
        /// <summary>
        /// 得到有效图形
        /// </summary>
        /// <param name="dgGrayValue"></param>
        public void GetPicValidByValue(int dgGrayValue)
        {
            int posx1 = bmpobj.Width; int posy1 = bmpobj.Height;
            int posx2 = 0; int posy2 = 0;
            for (int i = 0; i < bmpobj.Height; i++)      //找有效区
            {
                for (int j = 0; j < bmpobj.Width; j++)
                {
                    int pixelValue = bmpobj.GetPixel(j, i).R;
                    if (pixelValue > dgGrayValue)     //根据灰度值
                    {
                        if (posx1 > j) posx1 = j;
                        if (posy1 > i) posy1 = i;                        if (posx2 < j) posx2 = j;
                        if (posy2 < i) posy2 = i;
                    };
                };
            };
            //复制新图
            Rectangle cloneRect = new Rectangle(posx1-1, posy1-1, posx2 - posx1 + 3, posy2 - posy1 + 3);
            bmpobj = bmpobj.Clone(cloneRect, bmpobj.PixelFormat);
        }
        /// <summary>
        /// 平均分割图片
        /// </summary>
        /// <param name="RowNum">水平上分割数</param>
        /// <param name="ColNum">垂直上分割数</param>
        /// <returns>分割好的图片数组</returns>
        public Bitmap[] GetSplitPics(int RowNum, int ColNum)
        {
            if (RowNum == 0 || ColNum == 0)
                return null;
            int singW = bmpobj.Width / RowNum;
            int singH = bmpobj.Height / ColNum;
            Bitmap[] PicArray = new Bitmap[RowNum * ColNum];            Rectangle cloneRect;
            for (int i = 0; i < ColNum; i++)      //找有效区
            {
                for (int j = 0; j < RowNum; j++)
                {
                    cloneRect = new Rectangle(j * singW, i * singH, singW, singH);
                    PicArray[i * RowNum + j] = bmpobj.Clone(cloneRect, bmpobj.PixelFormat);//复制小块图
                }            }
            return PicArray;
        }
        /**/
        /// <summary>
        /// 返回灰度图片的点阵描述字串，1表示灰点，0表示背景
        /// </summary>
        /// <param name="singlepic">灰度图</param>
        /// <param name="dgGrayValue">背前景灰色界限</param>
        /// <returns></returns>
        public string GetSingleBmpCode(Bitmap singlepic, int dgGrayValue)
        {
            Color piexl;
            string code = "";
            for (int posy = 0; posy < singlepic.Height; posy++)
                for (int posx = 0; posx < singlepic.Width; posx++)
                {
                    piexl = singlepic.GetPixel(posx, posy);
                    if (piexl.R < dgGrayValue)    // Color.Black )
                        code = code + "1";
                    else
                        code = code + "0";
                }
            return code;
        }
    }
}

Answer 2

using System;
using System.Collections.Generic;
using System.Text;namespace DiscernCheckCode
{
    class Distance
    {        public static int LD(string s, string t)
        {            int n = s.Length; //length of s            int m = t.Length; //length of t            int[,] d = new int[n + 1, m + 1]; // matrix            int cost; // cost            if (n == 0) return m;            if (m == 0) return n;            for (int i = 0; i <= n; d[i, 0] = i++) ;            for (int j = 0; j <= m; d[0, j] = j++) ;            for (int i = 1; i <= n; i++)
            {
                for (int j = 1; j <= m; j++)
                {                    cost = (t.Substring(j - 1, 1) == s.Substring(i - 1, 1) ? 0 : 1);                    d[i, j] = System.Math.Min(System.Math.Min(d[i - 1, j] + 1, d[i, j - 1] + 1),
                              d[i - 1, j - 1] + cost);                }            }            return d[n, m];        }    }
}

Answer 3

窗体调用
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Net.Cache;namespace DiscernCheckCode
{
    public partial class Form3 : Form
    {
        IbcCheck uc;
        Bitmap[] listbit;
        public Form3()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(textBoxUrl.Text);
            myReq.CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore);            myReq.KeepAlive = true;
            myReq.Method = "GET";
            myReq.ContentType = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Maxthon; .NET CLR 1.1.4322)";            //接收HTTP做出的响应
            WebResponse myResp = myReq.GetResponse();
            Stream ReceiveStream = myResp.GetResponseStream();
            pictureBoxImage.Image = Image.FromStream(ReceiveStream);            myResp.Close();
            uc = new IbcCheck(new Bitmap(pictureBoxImage.Image));
        }        private void button2_Click(object sender, EventArgs e)
        {
            uc.GrayByPixels(180);
            pictureBoxImage.Image = uc.bmpobj;
            
        }        private void button3_Click(object sender, EventArgs e)
        {
            uc.GetPicValidByValue(180);
            pictureBoxImage.Image = uc.bmpobj;
        }        private void button4_Click(object sender, EventArgs e)
        {
            uc.ClearPicBorder(2);
            pictureBoxImage.Image = uc.bmpobj;
        }        private void button5_Click(object sender, EventArgs e)
        {
            listbit = uc.GetSplitPics(4, 1);
            for (int i = 0; i < 4; i++)
            {
                PictureBox pb = (PictureBox) this.Controls["pictureBox" + (i + 1)];
                pb.Image = listbit[i];
            }
        }        private void button6_Click(object sender, EventArgs e)
        {
            DAL dal = new DAL();//此处为数据库
            for (int i = 0; i < 4; i++)
            {
                string value = uc.GetSingleBmpCode(listbit[i], 128);//listbit[i]
                TextBox tb = (TextBox)this.Controls["textBox" + (i + 1).ToString()];
                if (tb.Text.Length > 0)
                {
                    dal.Add(tb.Text, value);
                }
            }
        }        private void button7_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 4; i++)
            {
                getNum(uc.GetSingleBmpCode(listbit[i], 100), i + 1);
            }
        }
        private void getNum(string value2, int index)
        {
            DAL dal = new DAL();
            List<CodeInfo> listCI = dal.GetInfo();
            foreach (CodeInfo item in listCI)
            {                string value = item.Value;
                string checkvalue = value2;
                double d = check(value, checkvalue);                if (d > 0.99)
                {
                    Label lable = (Label)this.Controls["label" + index];
                    lable.Text = item.Key;
                    return;
                }
            }
        }
        private double check(string num1, string num2)
        {
            return 1 - (Convert.ToDouble(Distance.LD(num1, num2)) / Convert.ToDouble(((num1.Length + num2.Length))));
        }
    }
}

Answer 4

多谢Neil198大大给我们代码的分享。结贴给分