c#完成辨認圖片上的驗證碼數字。本站提示廣大學習愛好者:(c#完成辨認圖片上的驗證碼數字)文章只能為提供參考,不一定能成為您想要的結果。以下是c#完成辨認圖片上的驗證碼數字正文
public void imgdo(Bitmap img) { //去色 Bitmap btp = img; Color c = new Color(); int rr, gg, bb; for (int i = 0; i < btp.Width; i++) { for (int j = 0; j < btp.Height; j++) { //取圖片以後的像素點 c = btp.GetPixel(i, j); rr = c.R; gg = c.G; bb = c.B; //轉變色彩 if (rr == 102 && gg == 0 && bb == 0) { //從新設置以後的像素點 btp.SetPixel(i, j, Color.FromArgb(255, 255, 255, 255)); } if (rr == 153 && gg == 0 && bb == 0) { //從新設置以後的像素點 btp.SetPixel(i, j, Color.FromArgb(255, 255, 255, 255)); } if (rr == 153 && gg == 0 && bb == 51) { //從新設置以後的像素點 btp.SetPixel(i, j, Color.FromArgb(255, 255, 255, 255)); } if (rr == 153 && gg == 43 && bb == 51) { //從新設置以後的像素點 btp.SetPixel(i, j, Color.FromArgb(255, 255, 255, 255)); } if (rr == 255 && gg == 255 && bb == 0) { //從新設置以後的像素點 btp.SetPixel(i, j, Color.FromArgb(255, 255, 255, 255)); } if (rr == 255 && gg == 255 && bb == 51) { //從新設置以後的像素點 btp.SetPixel(i, j, Color.FromArgb(255, 255, 255, 255)); } } } btp.Save("d:\\去除相干色彩.png"); pictureBox2.Image = Image.FromFile("d:\\去除相干色彩.png"); //灰度 Bitmap bmphd = btp; for (int i = 0; i < bmphd.Width; i++) { for (int j = 0; j < bmphd.Height; j++) { //取圖片以後的像素點 var color = bmphd.GetPixel(i, j); var gray = (int)(color.R * 0.001 + color.G * 0.700 + color.B * 0.250); //從新設置以後的像素點 bmphd.SetPixel(i, j, Color.FromArgb(gray, gray, gray)); } } bmphd.Save("d:\\灰度.png"); pictureBox27.Image = Image.FromFile("d:\\灰度.png"); //二值化 Bitmap erzhi = bmphd; Bitmap orcbmp; int nn = 3; int w = erzhi.Width; int h = erzhi.Height; BitmapData data = erzhi.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb); unsafe { byte* p = (byte*)data.Scan0; byte[,] vSource = new byte[w, h]; int offset = data.Stride - w * nn; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { vSource[x, y] = (byte)(((int)p[0] + (int)p[1] + (int)p[2]) / 3); p += nn; } p += offset; } erzhi.UnlockBits(data); Bitmap bmpDest = new Bitmap(w, h, PixelFormat.Format24bppRgb); BitmapData dataDest = bmpDest.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.WriteOnly, PixelFormat.Format24bppRgb); p = (byte*)dataDest.Scan0; offset = dataDest.Stride - w * nn; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { p[0] = p[1] = p[2] = (int)vSource[x, y] > 161 ? (byte)255 : (byte)0; //p[0] = p[1] = p[2] = (int)GetAverageColor(vSource, x, y, w, h) > 50 ? (byte)255 : (byte)0; p += nn; } p += offset; } bmpDest.UnlockBits(dataDest); orcbmp = bmpDest; orcbmp.Save("d:\\二值化.png"); pictureBox29.Image = Image.FromFile("d:\\二值化.png"); } //OCR的值 if (orcbmp != null) { string result = Ocr(orcbmp); label32.Text = result.WordStr("\n", "\r\n").WordStr(" ", ""); } }
C#辨認驗證碼圖片通用類
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); //轉換為Format32bppRgb } /// <summary> /// 依據RGB,盤算灰度值 /// </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> /// 灰度轉換,逐點方法 /// </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> /// 去圖形邊框 /// </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> /// 灰度轉換,逐行方法 /// </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); //對圖片停止處置 int GrayValue = 0; for (int i = 0; i < len; i++) { GrayValue = GetGrayNumColor(Color.FromArgb(pixels)); pixels = (byte)(Color.FromArgb(GrayValue, GrayValue, GrayValue)).ToArgb(); //Color轉byte } bmpobj.UnlockBits(bmpData); } /// <summary> /// 獲得有用圖形並調劑為可均勻朋分的年夜小 /// </summary> /// <param name="dgGrayValue">灰度配景分界值</param> /// <param name="CharsCount">有用字符數</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++) //找有用區 { for (int j = 0; j < bmpobj.Width; j++) { int pixelValue = bmpobj.GetPixel(j, i).R; if (pixelValue < dgGrayValue) //依據灰度值 { if (posx1 > j) posx1 = j; if (posy1 > i) posy1 = i; if (posx2 < j) posx2 = j; if (posy2 < i) posy2 = i; }; }; }; // 確保能整除 int Span = CharsCount - (posx2 - posx1 + 1) % CharsCount; //可整除的差額數 if (Span < CharsCount) { int leftSpan = Span / 2; //分派到右邊的空列 ,如span為雙數,則左邊比右邊年夜1 if (posx1 > leftSpan) posx1 = posx1 - leftSpan; if (posx2 + Span - leftSpan < bmpobj.Width) posx2 = posx2 + Span - leftSpan; } //復制新圖 Rectangle cloneRect = new Rectangle(posx1, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1); bmpobj = bmpobj.Clone(cloneRect, bmpobj.PixelFormat); } /// <summary> /// 獲得有用圖形,圖形為類變量 /// </summary> /// <param name="dgGrayValue">灰度配景分界值</param> /// <param name="CharsCount">有用字符數</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++) //找有用區 { for (int j = 0; j < bmpobj.Width; j++) { int pixelValue = bmpobj.GetPixel(j, i).R; if (pixelValue < dgGrayValue) //依據灰度值 { if (posx1 > j) posx1 = j; if (posy1 > i) posy1 = i; if (posx2 < j) posx2 = j; if (posy2 < i) posy2 = i; }; }; }; //復制新圖 Rectangle cloneRect = new Rectangle(posx1, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1); bmpobj = bmpobj.Clone(cloneRect, bmpobj.PixelFormat); } /// <summary> /// 獲得有用圖形,圖形由裡面傳入 /// </summary> /// <param name="dgGrayValue">灰度配景分界值</param> /// <param name="CharsCount">有用字符數</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++) //找有用區 { for (int j = 0; j < singlepic.Width; j++) { int pixelValue = singlepic.GetPixel(j, i).R; if (pixelValue < dgGrayValue) //依據灰度值 { if (posx1 > j) posx1 = j; if (posy1 > i) posy1 = i; if (posx2 < j) posx2 = j; if (posy2 < i) posy2 = i; }; }; }; //復制新圖 Rectangle cloneRect = new Rectangle(posx1, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1); return singlepic.Clone(cloneRect, singlepic.PixelFormat); } /// <summary> /// 均勻朋分圖片 /// </summary> /// <param name="RowNum">程度上朋分數</param> /// <param name="ColNum">垂直上朋分數</param> /// <returns>朋分好的圖片數組</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++) //找有用區 { 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);//復制小塊圖 } } return PicArray; } /// <summary> /// 前往灰度圖片的點陣描寫字串,1表現灰點,0表現配景 /// </summary> /// <param name="singlepic">灰度圖</param> /// <param name="dgGrayValue">背遠景灰色界線</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; } } }
以上2則都是應用C#完成的orc辨認的代碼,願望對年夜家進修C#有所贊助。