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C#_查找图片（按键精灵找图）

news 2025/8/22 11:37:59

一、class

    internal class Picture{/// <summary>/// 查找图片，不能镂空/// </summary>/// <param name="subPic"></param>/// <param name="searchRect">如果为empty，则默认查找整个图像</param>/// <param name="matchRate">图片匹配度，默认90%</param>/// <param name="errorRange">容错，单个色值范围内视为正确0~255</param>/// <param name="isFindAll">是否查找所有相似的图片</param>/// <returns>返回查找到的图片的中心点坐标</returns>public List<System.Drawing.Point> FindPicture(string subPic, System.Drawing.Rectangle searchRect, double matchRate = 0.9, byte errorRange = 0, bool isFindAll = false){List<System.Drawing.Point> ListPoint = new List<System.Drawing.Point>();var subBitmap = new Bitmap(subPic);//创建Bitmap位图类（尺寸与分辨率相同）            Bitmap parBitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);//从一个继承自Image类的对象中创建Graphics对象            Graphics g = Graphics.FromImage(parBitmap);//截取屏幕并复制到（g）myimage里            g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height));//保存截图//parBitmap.Save(System.Environment.CurrentDirectory + @"\temp\test.bmp");int subWidth = subBitmap.Width;int subHeight = subBitmap.Height;int parWidth = parBitmap.Width;int parHeight = parBitmap.Height;if (searchRect.IsEmpty){searchRect = new System.Drawing.Rectangle(0, 0, parBitmap.Width, parBitmap.Height);}var searchLeftTop = searchRect.Location;var searchSize = searchRect.Size;System.Drawing.Color startPixelColor = subBitmap.GetPixel(0, 0);var subData = subBitmap.LockBits(new System.Drawing.Rectangle(0, 0, subBitmap.Width, subBitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);var parData = parBitmap.LockBits(new System.Drawing.Rectangle(0, 0, parBitmap.Width, parBitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);var byteArrarySub = new byte[subData.Stride * subData.Height];var byteArraryPar = new byte[parData.Stride * parData.Height];Marshal.Copy(subData.Scan0, byteArrarySub, 0, subData.Stride * subData.Height);Marshal.Copy(parData.Scan0, byteArraryPar, 0, parData.Stride * parData.Height);var iMax = searchLeftTop.Y + searchSize.Height - subData.Height;//行var jMax = searchLeftTop.X + searchSize.Width - subData.Width;//列int smallOffsetX = 0, smallOffsetY = 0;int smallStartX = 0, smallStartY = 0;int pointX = -1; int pointY = -1;for (int i = searchLeftTop.Y; i < iMax; i++){for (int j = searchLeftTop.X; j < jMax; j++){//大图x，y坐标处的颜色值int x = j, y = i;int parIndex = i * parWidth * 4 + j * 4;var colorBig = System.Drawing.Color.FromArgb(byteArraryPar[parIndex + 3], byteArraryPar[parIndex + 2], byteArraryPar[parIndex + 1], byteArraryPar[parIndex]);;if (ColorAEqualColorB(colorBig, startPixelColor, errorRange)){smallStartX = x - smallOffsetX;//待找的图X坐标smallStartY = y - smallOffsetY;//待找的图Y坐标int sum = 0;//所有需要比对的有效点int matchNum = 0;//成功匹配的点for (int m = 0; m < subHeight; m++){for (int n = 0; n < subWidth; n++){int x1 = n, y1 = m;int subIndex = m * subWidth * 4 + n * 4;var color = System.Drawing.Color.FromArgb(byteArrarySub[subIndex + 3], byteArrarySub[subIndex + 2], byteArrarySub[subIndex + 1], byteArrarySub[subIndex]);sum++;int x2 = smallStartX + x1, y2 = smallStartY + y1;int parReleativeIndex = y2 * parWidth * 4 + x2 * 4;//比对大图对应的像素点的颜色var colorPixel = System.Drawing.Color.FromArgb(byteArraryPar[parReleativeIndex + 3], byteArraryPar[parReleativeIndex + 2], byteArraryPar[parReleativeIndex + 1], byteArraryPar[parReleativeIndex]);if (ColorAEqualColorB(colorPixel, color, errorRange)){matchNum++;}}}if ((double)matchNum / sum >= matchRate){Console.WriteLine((double)matchNum / sum);pointX = smallStartX + (int)(subWidth / 2.0);pointY = smallStartY + (int)(subHeight / 2.0);var point = new System.Drawing.Point(pointX, pointY);if (!ListContainsPoint(ListPoint, point, 10)){ListPoint.Add(point);}if (!isFindAll){goto FIND_END;}}}//小图x1,y1坐标处的颜色值}}FIND_END:subBitmap.UnlockBits(subData);parBitmap.UnlockBits(parData);subBitmap.Dispose();parBitmap.Dispose();GC.Collect();return ListPoint;}bool ColorAEqualColorB(System.Drawing.Color colorA, System.Drawing.Color colorB, byte errorRange = 10){return colorA.A <= colorB.A + errorRange && colorA.A >= colorB.A - errorRange &&colorA.R <= colorB.R + errorRange && colorA.R >= colorB.R - errorRange &&colorA.G <= colorB.G + errorRange && colorA.G >= colorB.G - errorRange &&colorA.B <= colorB.B + errorRange && colorA.B >= colorB.B - errorRange;}bool ListContainsPoint(List<System.Drawing.Point> listPoint, System.Drawing.Point point, double errorRange = 10){bool isExist = false;foreach (var item in listPoint){if (item.X <= point.X + errorRange && item.X >= point.X - errorRange && item.Y <= point.Y + errorRange && item.Y >= point.Y - errorRange){isExist = true;}}return isExist;}}
}

二、代码

前台操作，自行加延迟或锁定键盘鼠标。

1、全屏找图

            Picture picture = new Picture();List<System.Drawing.Point> points = new List<System.Drawing.Point>();points = picture.FindPicture(System.Environment.CurrentDirectory + @"\temp\test.bmp", Rectangle.Empty);

2、区域找图

            Picture picture = new Picture();List<System.Drawing.Point> points = new List<System.Drawing.Point>();Rectangle rectangle = new Rectangle(50, 50, 300, 300);points = picture.FindPicture(System.Environment.CurrentDirectory + @"\temp\test.bmp", rectangle);

3、循环找图

            do{points = picture.FindPicture(System.Environment.CurrentDirectory + @"\temp\test.bmp", rectangle);Thread.Sleep(1000);} while (points.Count == 0);

4、循环找图，避免死循环

            //查找10次，找不到跳出循环int i = 0;do{points = picture.FindPicture(System.Environment.CurrentDirectory + @"\temp\test.bmp", rectangle);i++;Thread.Sleep(1000);} while (points.Count == 0 && i < 10);

5、找图后鼠标点击

鼠标点击相关代码见此处。

            if (points.Count > 0){//移动鼠标到坐标点MouseHelper.SetCursorPos(points[0].X, points[0].Y);//鼠标左键单击MouseHelper.mouse_event(MouseHelper.MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);MouseHelper.mouse_event(MouseHelper.MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);}