破解校内的图片识别码。

Posted 2021-05-16 0x16

 

using  System;
using  System.Collections.Generic;
using  System.Text;
using  System.Drawing;

namespace  XiaoNei.VerifyImage
... {
    public static class Verify
    ...{
        private static int[,] imageDatas;
        private static String code;
        private static Bitmap image;

        /**//**//**//// <summary>
        /// 获取验证码
        /// </summary>
        /// <param name="filename">输入文件名</param>
        /// <returns>验证码</returns>
       
        public static String getCode(String filename)      
        ...{
            Bitmap image = new Bitmap(filename);
            readDatas(image);
            code = "" + getBestCode(getSimple(3, 5)) +
                    getBestCode(getSimple(3, 13)) +
                    getBestCode(getSimple(3, 21)) +
                    getBestCode(getSimple(3, 29));
            Console.WriteLine(code);

            //测试识别是否正确，文件名中含有验证码
            //if (filename.IndexOf(code) < 0)
               // Console.WriteLine("Error");
            return code;
        }

        /**//**//**//// <summary>
        /// 初始化数据
        /// </summary>
        private static void readDatas(Bitmap image)
        ...{

            imageDatas = new int[image.Height, image.Width];
            Color pixelColor;
            for (int h = 0; h < image.Height; h++)
            ...{
                for (int w = 0; w < image.Width; w++)
                ...{
                    pixelColor = image.GetPixel(w, h);

                    imageDatas[h, w] = pixelColor.R > 0 ? 1 : 0;
                }//for
            }//for
        }
        /**//**//**//// <summary>
        /// 取数字块
        /// </summary>
        /// <param name="x">横坐标</param>
        /// <param name="y">纵坐标</param>
        /// <returns>一维数组</returns>
        private static int[] getSimple(int x, int y)
        ...{
            int[] simple = new int[9 * 6];
            int count = 0;
            for (int h = x; h < x + 9; h++)
            ...{
                for (int w = y; w < y + 6; w++)
                ...{
                    simple[count++] = imageDatas[h, w];
                }
            }
            return simple;
        }
        /**//**//**//// <summary>
        /// 最和谐的数字
        /// </summary>
        /// <param name="x">数字块</param>
        /// <returns>结果</returns>
        private static int getBestCode(int[] x)
        ...{
            int bestNumber = -1;
            double bestVal = 0.0;
            for (int index = 0; index < 10; index++)
            ...{
                double val = compareSimple(NumberData.getNumber(index), x);
                if (bestVal <= val)
                ...{
                    bestVal = val;
                    bestNumber = index;
                }
            }
            return bestNumber;
        }
        /**//**//**//// <summary>
        /// 获取两个数字图像数组的和谐百分比
        /// </summary>
        /// <param name="t">匹配数字数组</param>
        /// <param name="x">待匹配数字数组</param>
        /// <returns>和谐百分比</returns>
        private static double compareSimple(int[] t, int[] x)
        ...{
            int count = 0;
            int val = 0;
            for (int i = 0; i < t.Length; i++)
            ...{
                if (1 == t[i])
                ...{
                    count++;
                    if (1 == x[i])
                    ...{
                        val++;
                    }
                }
            }
            return (val + 0.0) / count;
        }
    }


}

最近在做一个校内刷人气的小工具，顺便把图像识别搞了一下。 把源代码贴出来。请高手指教。

using  System;
using  System.Drawing;
using  System.Collections;
using  System.ComponentModel;
using  System.Windows.Forms;
using  System.Net; 
using  System.IO;
using  System.Text;

namespace  XiaoNei.VerifyImage
... {
   public  class DownLoadImage
    ...{
        /**//// <summary>
        /// 从图片地址下载图片到本地磁盘
        /// </summary>
        /// <param name="ToLocalPath">图片本地磁盘地址</param>
        /// <param name="Url">图片网址</param>
        /// <returns></returns>
        public static bool SavePhotoFromUrl(string FileName, string Url)
        ...{
            bool Value = false;
            WebResponse response = null;
            Stream stream = null;

            try
            ...{
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);

                response = request.GetResponse();
                stream = response.GetResponseStream();

                if (!response.ContentType.ToLower().StartsWith("text/"))
                ...{
                    Value = SaveBinaryFile(response, FileName);

                }

            }
            catch (Exception err)
            ...{
                string aa = err.ToString();
            }
            return Value;
        }
        /**//// <summary>
        /// Save a binary file to disk.
        /// </summary>
        /// <param name="response">The response used to save the file</param>
        // 将二进制文件保存到磁盘
        private static bool SaveBinaryFile(WebResponse response, string FileName)
        ...{
            bool Value = true;
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