有做验证码识别的吗? 进来帮个忙,谢谢了

Question

我试过在winform里面做过。web的我不会。顶你到上面去

Answer 1

我就是要在winform里面呀,
  只不过是这个图片,用流把这个图片读下来,然后去识别呀

Answer 2

asp.net生成一个验证图片的静态类（含调用） 
using System.IO; 
using System.Drawing; 
using System.Drawing.Drawing2D; 
using System.Drawing.Imaging; 
using System; 
using System.Web.Caching; 
/// <summary> 
/// CreateCheckCodeImage 的摘要说明 
/// 此类是一个静态类，不需要实例化 
/// </summary> 
public static class CreateCheckCodeImage 
{ 
    /// <summary> 
    /// 在内存中生成一个验证图片 
    /// </summary> 
    /// <returns>System.IO.MemoryStream</returns> 
    public static MemoryStream Production(string StrCode) 
    { 
        MemoryStream ms = new MemoryStream(); 
        if (string.Equals(StrCode, string.Empty)) 
        { 
            return ms; 
        } 
        Bitmap image = new Bitmap((int)Math.Ceiling(StrCode.Length * 16.5),22); 
        Graphics g = Graphics.FromImage(image); 
        try 
        { 
            System.Random random = new Random(); 
            g.Clear(Color.White); 
            //生成背景干扰点 
            for (int i = 0; i < 25; i++) 
            { 
                int x1 = random.Next(image.Width); 
                int x2 = random.Next(image.Width); 
                int y1 = random.Next(image.Height); 
                int y2 = random.Next(image.Height); 
                g.DrawLine(new Pen(Color.Silver), x1, x2, y1, y2); 
            } 
            //生成验证字符 
            Font font = new System.Drawing.Font("Arial", 16, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic)); 
            System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true); 
            g.DrawString(StrCode, font, brush,2,2); 
            //生成前景干扰点 
            for (int i = 0; i < 100; i++) 
            { 
                int x1 = random.Next(image.Width); 
                int y1 = random.Next(image.Height); 
                image.SetPixel(x1, y1, Color.FromArgb(random.Next())); 
            } 
            //化图片的边框 
            g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);             image.Save(ms, ImageFormat.Gif); 
            return ms; 
        } 
        finally 
        { 
            g.Dispose(); 
            image.Dispose(); 
        } 
    } 
    /// <summary> 
    /// 随即生成一段字符串，用作生成随即图片 
    /// </summary> 
    /// <returns>string</returns> 
    public static string GenerateCheckCode() 
    { 
        int number; 
        char code; 
        string CheckCode = string.Empty; 
        System.Random random = new System.Random(); 
        for (int i = 0; i < 5; i++) 
        { 
            number = random.Next(); 
            if (number % 2 == 0) 
            { 
                code = (char)('0' + (char)(number % 10)); 
            } 
            else 
            { 
                code = (char)('A' + (char)(number % 26)); 
            } 
            CheckCode += code.ToString(); 
        } 
        return CheckCode; 
    } 
} //调用 
        string temStr = CreateCheckCodeImage.GenerateCheckCode(); 
        Response.ClearContent(); 
        Response.Cache.SetCacheability(HttpCacheability.NoCache); 
        //写入Cookie["CheckCodeStrV "]=temStr,以后对比的时候可以用此值 
        Response.Cookies.Add(new HttpCookie("CheckCodeStrV", temStr)); 
        Response.ContentType = "image/Gif"; 
        Response.BinaryWrite(CreateCheckCodeImage.Production(temStr).ToArray()); 

Answer 3

可以实现：
添加个label 显示在这个上面 label的autosize改为false backcolor改为白色在paint事件添加如下代码：
  private void label1_Paint(object sender, PaintEventArgs e)
        {            Random rd = new Random();
            string VNum = Convert.ToString(rd.Next(1000, 9999));
            Graphics g = e.Graphics;
            g.Clear(Color.White);
           
            Font f = new Font("Tahoma", 9);
            SolidBrush s = new SolidBrush(Color.Red);
            g.DrawString(VNum, f, s, 3, 3);
         
        }也可以把它封装在一个方法中：
  public void F()
        {
            Random rd = new Random();
            string VNum = Convert.ToString(rd.Next(1000, 9999));
            Graphics g = label1.CreateGraphics();//创建label的画板
            g.Clear(Color.White);
            Font f = new Font("Tahoma", 9);
            SolidBrush s = new SolidBrush(Color.Red);
            g.DrawString(VNum, f, s, 3, 3);
        }
这样把这方法放在按钮事件也能改变验证码的内容了

Answer 4

这个容易，读下来，先去色，二值化后，用PHOTOSHOP做特征库
确定位置，比对就好，最相近的就是那个数字啦。

Answer 5

收藏过一个，但是彩色的实别率不高啊,不同地方还得自己慢慢调using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;namespace BallotAiying2
{
    class UnCodebase
    {
        public Bitmap bmpobj;
        public UnCodebase(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>
        /// 灰度转换,逐点方式
        /// </summary>
        public void GrayByPixels()
        {
            for (int i = 0; i < bmpobj.Height; i++)
            {
                for (int j = 0; j < bmpobj.Width; j++)
                {
                    int tmpValue = GetGrayNumColor(bmpobj.GetPixel(j, i));
                    bmpobj.SetPixel(j, i, Color.FromArgb(tmpValue, tmpValue, tmpValue));
                }
            }
        }        /**//// <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(255, 255, 255));
                }
            }
        }        /**//// <summary>
        /// 灰度转换,逐行方式
        /// </summary>
        public void GrayByLine()
        {
            Rectangle rec = new Rectangle(0, 0, bmpobj.Width, bmpobj.Height);
            BitmapData bmpData = bmpobj.LockBits(rec, ImageLockMode.ReadWrite, bmpobj.PixelFormat);// PixelFormat.Format32bppPArgb);
            //    bmpData.PixelFormat = PixelFormat.Format24bppRgb;
            IntPtr scan0 = bmpData.Scan0;
            int len = bmpobj.Width * bmpobj.Height;
            int[] pixels = new int[len];
            Marshal.Copy(scan0, pixels, 0, len);            //对图片进行处理
            int GrayValue = 0;
            for (int i = 0; i < len; i++)
            {
                GrayValue = GetGrayNumColor(Color.FromArgb(pixels[i]));
                pixels[i] = (byte)(Color.FromArgb(GrayValue, GrayValue, GrayValue)).ToArgb();      //Color转byte
            }            bmpobj.UnlockBits(bmpData);
        }        /**//// <summary>
        /// 得到有效图形并调整为可平均分割的大小
        /// </summary>
        /// <param name="dgGrayValue">灰度背景分界值</param>
        /// <param name="CharsCount">有效字符数</param>
        /// <returns></returns>
        public void GetPicValidByValue(int dgGrayValue, int CharsCount)
        {
            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;
                    };
                };
            };
            // 确保能整除
            int Span = CharsCount - (posx2 - posx1 + 1) % CharsCount;   //可整除的差额数
            if (Span < CharsCount)
            {
                int leftSpan = Span / 2;    //分配到左边的空列 ，如span为单数,则右边比左边大1
                if (posx1 > leftSpan)
                    posx1 = posx1 - leftSpan;
                if (posx2 + Span - leftSpan < bmpobj.Width)
                    posx2 = posx2 + Span - leftSpan;
            }
            //复制新图
            Rectangle cloneRect = new Rectangle(posx1, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1);
            bmpobj = bmpobj.Clone(cloneRect, bmpobj.PixelFormat);
        }
        
       

Answer 6

 /**//// <summary>
        /// 得到有效图形,图形为类变量
        /// </summary>
        /// <param name="dgGrayValue">灰度背景分界值</param>
        /// <param name="CharsCount">有效字符数</param>
        /// <returns></returns>
        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, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1);
            bmpobj = bmpobj.Clone(cloneRect, bmpobj.PixelFormat);
        }        /**//// <summary>
        /// 得到有效图形,图形由外面传入
        /// </summary>
        /// <param name="dgGrayValue">灰度背景分界值</param>
        /// <param name="CharsCount">有效字符数</param>
        /// <returns></returns>
        public Bitmap GetPicValidByValue(Bitmap singlepic, int dgGrayValue)
        {
            int posx1 = singlepic.Width; int posy1 = singlepic.Height;
            int posx2 = 0; int posy2 = 0;
            for (int i = 0; i < singlepic.Height; i++)      //找有效区
            {
                for (int j = 0; j < singlepic.Width; j++)
                {
                    int pixelValue = singlepic.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, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1);
            return singlepic.Clone(cloneRect, singlepic.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 7

我想问个问题，读图片是也有个问题，因为验证码是动态生成的所以说它在物理上是不存在的，所以首先要将它转换成图片来进行解析，而你看看网上验证码属性后后缀显示的都是.asp/fsd.....其它东西，而不是标准的jpg或bmp，所以说这里也是个难点。
   楼主这个地方是怎么解决的啊，可以交流下么。我Email:[email protected]谢谢了！！