Aforge.net识别简易数字验证码问题

 ????????/// <summary> ????????/// 通过GET方式获取验证码 ????????/// </summary> ????????/// <param name="Url">url</param> ????????/// <param name="postDataStr">GET数据</param> ????????/// <param name="cookie">GET容器</param> ????????/// <returns></returns> ????????public void SendDataByGET1(string Url, ref CookieContainer cookie) ????????{ ????????????HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url); ????????????if (cookie.Count == 0) ????????????{ ????????????????request.CookieContainer = new CookieContainer(); ????????????????cookie = request.CookieContainer; ????????????} ????????????else ????????????{ ????????????????request.CookieContainer = cookie; ????????????} ????????????request.Method = "GET"; ????????????request.ContentType = "text/html;charset=UTF-8"; ????????????HttpWebResponse response = (HttpWebResponse)request.GetResponse(); ????????????MemoryStream ms = null; ????????????using (var stream = response.GetResponseStream()) ????????????{ ????????????????Byte[] buffer = new Byte[response.ContentLength]; ????????????????int offset = 0, actuallyRead = 0; ????????????????do ????????????????{ ????????????????????actuallyRead = stream.Read(buffer, offset, buffer.Length - offset); ????????????????????offset += actuallyRead; ????????????????} ????????????????while (actuallyRead > 0); ????????????????ms = new MemoryStream(buffer); ????????????} ????????????b = new Bitmap(ms); ????????????//aforge只接受像素格式为24/32bpp的像素格式图片，所以处理前，先进行格式转化 ????????????var bnew = new Bitmap(b.Width, b.Height,PixelFormat.Format24bppRgb); ????????????Graphics g = Graphics.FromImage(bnew); ????????????g.DrawImage(b, 0, 0); ????????????g.Dispose(); ???????????????????pictureBox1.Image = bnew; ????????????????????//b = new Threshold(50).Apply(b); ????????????response.Close(); ?????????????????????string ?strCookies = request.CookieContainer.GetCookieHeader(request.RequestUri); //把cookies转换成字符串 ???????textBox2.Text=new VerificationCodeProcess().GetVerificationCode(bnew).ToString(); ????????????//Stream myResponseStream = response.GetResponseStream(); ????????????//StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); ????????????//string retString = myStreamReader.ReadToEnd(); ????????????//myStreamReader.Close(); ????????????//myResponseStream.Close(); ??????????//MessageBox.Show(strCookies); ????????}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Drawing;using System.Drawing.Imaging;using System.Drawing.Printing;using System.Linq;using System.Text;using System.Windows.Forms;//using System.Net;using System.IO;using Model;using BLL;using Model;using AForge;using AForge.Imaging;using AForge.MachineLearning;using System.Drawing.Drawing2D;using AForge.Imaging.Filters;namespace EmsService{ ???public class VerificationCodeProcess ???{ ???????public int GetVerificationCode(Bitmap bmp) ???????{ ???????????//灰度 ???????????bmp = ToGray(bmp); ???????????// ?MessageBox.Show(b.PixelFormat.ToString()); ???????????//二进制// ???????????// pictureBox3.Image = ConvertToBinaryImage(new Bitmap(pictureBox2.Image)); ???????????bmp = ConvertToBinaryImage(bmp); ???????????// ??MessageBox.Show(b.PixelFormat.ToString()); ???????????//分割 ???????????List<Bitmap> bmList = ToResizeAndCenterIt(Crop_X(Crop_Y(bmp))); ???????????//二进制化 ???????????StringBuilder sb = new StringBuilder(); ???????????List<string> lls = PP(bmList); ???????????int top = Convert.ToInt32(lls[0]); ???????????int last = Convert.ToInt32(lls[2]); ???????????int result = 0; ???????????if (lls[1] == "-") ???????????{ ???????????????result = top - last; ???????????} ???????????else ???????????{ ???????????????result = top + last; ???????????} ???????????return result; ???????} ???????/// <summary> ???????/// 灰度处理 ???????/// </summary> ???????/// <param name="bmp"></param> ???????/// <returns></returns> ???????public Bitmap ToGray(Bitmap bmp) ???????{ ???????????Bitmap bm = new Bitmap(bmp.Width, bmp.Height); ???????????for (int i = 0; i < bmp.Width; i++) ???????????{ ???????????????for (int j = 0; j < bmp.Height; j++) ???????????????{ ???????????????????// 获取该点的像素的RGB的颜色 ?????????????????????Color color = bmp.GetPixel(i, j); ???????????????????// 利用公式计算灰度值 ?????????????????????// 根据YUV的颜色空间中，Y的分量的物理意义是点的亮度，由该值反映亮度等级， ?????????????????????// 根据RGB和YUV颜色空间的变化关系可建立亮度Y与R、G、B三个颜色分量的对应： ?????????????????????// Y=0.3R+0.59G+0.11B，以这个亮度值表达图像的灰度值 ?????????????????????int gray = (int)(color.R * 0.3 + color.G * 0.59 + color.B * 0.11); ???????????????????Color newColor = Color.FromArgb(gray, gray, gray); ???????????????????bm.SetPixel(i, j, newColor); ???????????????} ???????????} ???????????return bm; ???????} ???????/// <summary> ???????/// 二进制化 ???????/// </summary> ???????/// <param name="bmp"></param> ???????/// <returns></returns> ???????public Bitmap ConvertToBinaryImage(Bitmap bmp) ???????{ ???????????Bitmap bm = new Bitmap(bmp.Width, bmp.Height); ???????????int average = 0; ???????????for (int i = 0; i < bmp.Width; i++) ???????????{ ???????????????for (int j = 0; j < bmp.Height; j++) ???????????????{ ???????????????????Color color = bmp.GetPixel(i, j); ???????????????????average += color.B; ???????????????} ???????????} ???????????average = 60; ???????????for (int i = 0; i < bmp.Width; i++) ???????????{ ???????????????for (int j = 0; j < bmp.Height; j++) ???????????????{ ???????????????????//获取该点的像素的RGB的颜色 ?????????????????????Color color = bmp.GetPixel(i, j); ???????????????????int value = 255 - color.B; ???????????????????Color newColor = value > average ? Color.FromArgb(0, 0, 0) : Color.FromArgb(255, 255, 255); ???????????????????bm.SetPixel(i, j, newColor); ???????????????} ???????????} ???????????return bm; ???????} ???????/// <summary> ???????/// 重置图片的指定大小并且居中 ???????/// </summary> ???????/// <param name="list"></param> ???????/// <returns></returns> ???????public List<Bitmap> ToResizeAndCenterIt(List<Bitmap> list, int w = 20, int h = 20) ???????{ ???????????List<Bitmap> resizeList = new List<Bitmap>(); ???????????for (int i = 0; i < list.Count; i++) ???????????{ ???????????????//MessageBox.Show(list[i].PixelFormat.ToString()); ???????????????//反转一下图片 ???????????????var bnew10 = new Bitmap(list[i].Width, list[i].Height, PixelFormat.Format24bppRgb); ???????????????Graphics g10 = Graphics.FromImage(bnew10); ???????????????g10.DrawImage(list[i], 0, 0); ???????????????g10.Dispose(); ???????????????list[i] = bnew10; ???????????????list[i] = new Invert().Apply(list[i]); ???????????????int sw = list[i].Width; ???????????????int sh = list[i].Height; ???????????????Crop corpFilter = new Crop(new Rectangle(0, 0, w, h)); ???????????????list[i] = corpFilter.Apply(list[i]); ???????????????//var bnew1 = new Bitmap(list[i].Width, list[i].Height, PixelFormat.Format24bppRgb); ???????????????//Graphics g1 = Graphics.FromImage(bnew1); ???????????????//g1.DrawImage(list[i], 0, 0); ???????????????//g1.Dispose(); ???????????????//再反转回去 ???????????????list[i] = new Invert().Apply(list[i]); ???????????????// //计算中心位置 ???????????????int centerX = (w - sw) / 2; ???????????????int centerY = (h - sh) / 2; ???????????????var bnew2 = new Bitmap(list[i].Width, list[i].Height, PixelFormat.Format24bppRgb); ???????????????Graphics g2 = Graphics.FromImage(bnew2); ???????????????g2.DrawImage(list[i], 0, 0); ???????????????g2.Dispose(); ???????????????list[i] = new CanvasMove(new AForge.IntPoint(centerX, centerY), Color.White).Apply(list[i]); ???????????????resizeList.Add(list[i]); ???????????} ???????????return resizeList; ???????} ???????/// <summary> ???????/// 按照 Y 轴线 切割 ???????/// (丢弃等于号) ???????/// </summary> ???????/// <param name="?"></param> ???????/// <returns></returns> ???????public List<Bitmap> Crop_Y(Bitmap b) ???????{ ???????????var list = new List<Bitmap>(); ???????????//统计每一列的“1”的个数，方便切除 ???????????int[] cols = new int[b.Width]; ???????????/* ??????????????* ?纵向切割 ??????????????*/ ???????????for (int x = 0; x < b.Width; x++) ???????????{ ???????????????for (int y = 0; y < b.Height; y++) ???????????????{ ???????????????????//获取当前像素点像素 ???????????????????var pixel = b.GetPixel(x, y); ???????????????????//说明是黑色点 ???????????????????if (pixel.R == 0) ???????????????????{ ???????????????????????cols[x] = ++cols[x]; ???????????????????} ???????????????} ???????????} ???????????int left = 0, right = 0; ???????????for (int i = 0; i < cols.Length; i++) ???????????{ ???????????????//说明该列有像素值（为了防止像素干扰，去噪后出现空白的问题，所以多判断一下，防止切割成多个) ???????????????if (cols[i] > 0 || (i + 1 < cols.Length && cols[i + 1] > 0)) ???????????????{ ???????????????????if (left == 0) ???????????????????{ ???????????????????????//切下来图片的横坐标left ???????????????????????left = i; ???????????????????} ???????????????????else ???????????????????{ ???????????????????????//切下来图片的横坐标right ???????????????????????right = i; ???????????????????} ???????????????} ???????????????else ???????????????{ ???????????????????//说明已经有切割图了，下面我们进行切割处理 ???????????????????if ((left > 0 || right > 0)) ???????????????????{ ???????????????????????Crop corp = new Crop(new Rectangle(left, 0, right - left + 1, b.Height)); ???????????????????????var small = corp.Apply(b); ???????????????????????//居中，将图片放在20*50的像素里面 ???????????????????????list.Add(small); ???????????????????} ???????????????????left = right = 0; ???????????????} ???????????} ???????????return list; ???????} ???????/// <summary> ???????/// 按照 X 轴线 切割 ???????/// </summary> ???????/// <param name="b"></param> ???????/// <returns></returns> ???????public List<Bitmap> Crop_X(List<Bitmap> list) ???????{ ???????????var corplist = new List<Bitmap>(); ???????????//再对分割的图进行上下切割，取出上下的白边 ???????????foreach (var segb in list) ???????????{ ???????????????//统计每一行的“1”的个数，方便切除 ???????????????int[] rows = new int[segb.Height]; ???????????????/* ????????????????* ?横向切割 ??????????????????*/ ???????????????for (int y = 0; y < segb.Height; y++) ???????????????{ ???????????????????for (int x = 0; x < segb.Width; x++) ???????????????????{ ???????????????????????//获取当前像素点像素 ???????????????????????var pixel = segb.GetPixel(x, y); ???????????????????????//说明是黑色点 ???????????????????????if (pixel.R == 0) ???????????????????????{ ???????????????????????????rows[y] = ++rows[y]; ???????????????????????} ???????????????????} ???????????????} ???????????????int bottom = 0, top = 0; ???????????????for (int y = 0; y < rows.Length; y++) ???????????????{ ???????????????????//说明该行有像素值（为了防止像素干扰，去噪后出现空白的问题，所以多判断一下，防止切割成多个) ???????????????????if (rows[y] > 0 || (y + 1 < rows.Length && rows[y + 1] > 0)) ???????????????????{ ???????????????????????if (top == 0) ???????????????????????{ ???????????????????????????//切下来图片的top坐标 ???????????????????????????top = y; ???????????????????????} ???????????????????????else ???????????????????????{ ???????????????????????????//切下来图片的bottom坐标 ???????????????????????????bottom = y; ???????????????????????} ???????????????????} ???????????????????else ???????????????????{ ???????????????????????//说明已经有切割图了，下面我们进行切割处理 ???????????????????????if ((top > 0 || bottom > 0) && bottom - top > 0) ???????????????????????{ ???????????????????????????Crop corp = new Crop(new Rectangle(0, top, segb.Width, bottom - top + 1)); ???????????????????????????var small = corp.Apply(segb); ???????????????????????????corplist.Add(small); ???????????????????????} ???????????????????????top = bottom = 0; ???????????????????} ???????????????} ???????????} ???????????return corplist; ???????} ???????//模式匹配 ???????public List<string> PP(List<Bitmap> list) ???????{ ???????????var files = Directory.GetFiles(Environment.CurrentDirectory + "\\temp\\"); ???????????var templateList = files.Select(i => { return new Bitmap(i); }).ToList(); ???????????var templateListFileName = files.Select(i => { return i.Substring(i.Length - 5).Substring(0, 1); }).ToList(); ???????????var result = new List<string>(); ???????????ExhaustiveTemplateMatching templateMatching = new ExhaustiveTemplateMatching(0.9f); ???????????//这里面有四张图片，进行四张图的模板匹配 ???????????for (int i = 0; i < 3; i++) ???????????{ ???????????????float max = 0; ???????????????int index = 0; ???????????????for (int j = 0; j < templateList.Count; j++) ???????????????{ ???????????????????var compare = templateMatching.ProcessImage(list[i], templateList[j]); ???????????????????if (compare.Length > 0 && compare[0].Similarity > max) ???????????????????{ ???????????????????????//记录下最相似的 ???????????????????????max = compare[0].Similarity; ???????????????????????index = j; ???????????????????} ???????????????} ???????????????result.Add(templateListFileName[index]); ???????????} ???????????return result; ???????} ???}}