UnCodebase

来源：互联网发布：龙江网络投诉电话编辑：程序博客网时间：2024/05/16 10:39
using System;using System.Collections.Generic;using System.Text;using System.Collections;using System.Drawing;using System.Drawing.Imaging;using System.Runtime.InteropServices;namespace 验证码{    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);        }        /// <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;        }        public int GetdgGrayValue(Bitmap singlepic)        {            Color piexl;            int max, min;            piexl = singlepic.GetPixel(0, 0);            max = piexl.R;            min = max;            for (int posy = 0; posy < singlepic.Height; posy++)                for (int posx = 0; posx < singlepic.Width; posx++)                {                    piexl = singlepic.GetPixel(posx, posy);                    if (piexl.R > max)    // Color.Black )                        max = piexl.R;                    else if (piexl.R < min)                        min = piexl.R;                }            return (max + min) / 2;        }        /// <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 )                    {                        singlepic.SetPixel(posx, posy, Color.Black);                        code = code + "1";                    }                    else                    {                        singlepic.SetPixel(posx, posy, Color.White);                        code = code + "0";                    }                }            return code;        }    }}
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