找图的功能用C或C++的实现方法
发布网友
发布时间：2022-05-09 19:16
共3个回答
热心网友
时间：2023-10-14 15:38
2
3 /// <summary>
4 /// 查找图片，不能镂空
5 /// </summary>
6 /// <param name="subPic"></param>
7 /// <param name="parPic"></param>
8 /// <param name="searchRect">如果为empty，则默认查找整个图像</param>
9 /// <param name="errorRange">容错，单个色值范围内视为正确0~255</param>
10 /// <param name="matchRate">图片匹配度，默认90%</param>
11 /// <param name="isFindAll">是否查找所有相似的图片</param>
12 /// <returns>返回查找到的图片的中心点坐标</returns>
13 List<System.Drawing.Point> FindPicture(string subPic, string parPic, System.Drawing.Rectangle searchRect, byte errorRange, double matchRate = 0.9, bool isFindAll = false)
14 {
15 List<System.Drawing.Point> ListPoint = new List<System.Drawing.Point>();
16 var subBitmap = new Bitmap(subPic);
17 var parBitmap = new Bitmap(parPic);
18 int subWidth = subBitmap.Width;
19 int subHeight = subBitmap.Height;
20 int parWidth = parBitmap.Width;
21 int parHeight = parBitmap.Height;
22 if (searchRect.IsEmpty)
23 {
24 searchRect = new System.Drawing.Rectangle(0, 0, parBitmap.Width, parBitmap.Height);
25 }
26
27 var searchLeftTop = searchRect.Location;
28 var searchSize = searchRect.Size;
29 System.Drawing.Color startPixelColor = subBitmap.GetPixel(0, 0);
30 var subData = subBitmap.LockBits(new System.Drawing.Rectangle(0, 0, subBitmap.Width, subBitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
31 var parData = parBitmap.LockBits(new System.Drawing.Rectangle(0, 0, parBitmap.Width, parBitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
32 var byteArrarySub = new byte[subData.Stride * subData.Height];
33 var byteArraryPar = new byte[parData.Stride * parData.Height];
34 Marshal.Copy(subData.Scan0, byteArrarySub, 0, subData.Stride * subData.Height);
35 Marshal.Copy(parData.Scan0, byteArraryPar, 0, parData.Stride * parData.Height);
36
37 var iMax = searchLeftTop.Y + searchSize.Height - subData.Height;//行
38 var jMax = searchLeftTop.X + searchSize.Width - subData.Width;//列
39
40 int smallOffsetX = 0, smallOffsetY = 0;
41 int smallStartX = 0, smallStartY = 0;
42 int pointX = -1; int pointY = -1;
43 for (int i = searchLeftTop.Y; i < iMax; i++)
44 {
45 for (int j = searchLeftTop.X; j < jMax; j++)
46 {
47 //大图x，y坐标处的颜色值
48 int x = j, y = i;
49 int parIndex = i * parWidth * 4 + j * 4;
50 var colorBig = System.Drawing.Color.FromArgb(byteArraryPar[parIndex + 3], byteArraryPar[parIndex + 2], byteArraryPar[parIndex + 1], byteArraryPar[parIndex]);
51 ;
52 if (ColorAEqualColorB(colorBig, startPixelColor, errorRange))
53 {
54 smallStartX = x - smallOffsetX;//待找的图X坐标
55 smallStartY = y - smallOffsetY;//待找的图Y坐标
56 int sum = 0;//所有需要比对的有效点
57 int matchNum = 0;//成功匹配的点
58 for (int m = 0; m < subHeight; m++)
59 {
60 for (int n = 0; n < subWidth; n++)
61 {
62 int x1 = n, y1 = m;
63 int subIndex = m * subWidth * 4 + n * 4;
64 var color = System.Drawing.Color.FromArgb(byteArrarySub[subIndex + 3], byteArrarySub[subIndex + 2], byteArrarySub[subIndex + 1], byteArrarySub[subIndex]);
65
66 sum++;
67 int x2 = smallStartX + x1, y2 = smallStartY + y1;
68 int parReleativeIndex = y2 * parWidth * 4 + x2 * 4;//比对大图对应的像素点的颜色
69 var colorPixel = System.Drawing.Color.FromArgb(byteArraryPar[parReleativeIndex + 3], byteArraryPar[parReleativeIndex + 2], byteArraryPar[parReleativeIndex + 1], byteArraryPar[parReleativeIndex]);
70 if (ColorAEqualColorB(colorPixel, color, errorRange))
71 {
72 matchNum++;
73 }
74 }
75 }
76 if ((double)matchNum / sum >= matchRate)
77 {
78 Console.WriteLine((double)matchNum / sum);
79 pointX = smallStartX + (int)(subWidth / 2.0);
80 pointY = smallStartY + (int)(subHeight / 2.0);
81 var point = new System.Drawing.Point(pointX, pointY);
82 if (!ListContainsPoint(ListPoint, point, 10))
83 {
84 ListPoint.Add(point);
85 }
86 if (!isFindAll)
87 {
88 goto FIND_END;
89 }
90 }
91 }
92 //小图x1,y1坐标处的颜色值
93 }
94 }
95 FIND_END:
96 subBitmap.UnlockBits(subData);
97 parBitmap.UnlockBits(parData);
98 subBitmap.Dispose();
99 parBitmap.Dispose();
100 GC.Collect();
101 return ListPoint;
102 }
103 #endregion
热心网友
时间：2023-10-14 15:38
下面是一个简单的示例，方法比较笨，不过胜在有效:)，在vc6中编译通过~~~
bool FindPic(CString FileName)
{
CString result = "";
CBitmap bmp;
BITMAP bm;
HBITMAP hBmp;
CDC bmpDC;
hBmp = (HBITMAP)::LoadImage(AfxGetInstanceHandle(),FileName,IMAGE_BITMAP,0,0,LR_LOADFROMFILE);
bmp.DeleteObject();
bmp.Attach( hBmp );
bmp.GetObject(sizeof(BITMAP),&bm);
bmpDC.CreateCompatibleDC(NULL);
bmpDC.SelectObject(&bmp); //图片DC
HDC hScreenDC = ::GetDC(NULL); //屏幕DC
bool found = false;//是否匹配到
bool next = false;//是否找下一个点
for (int i = 0;i<1280 && !found;i++)
{
for (int j = 0 ; j<1024 && !found;j++)
{
next = false;
for (int a = 0;a<30 && !next;a++)
{
for (int b = 0;b<30&&!next;b++)
{
if(GetPixel(hScreenDC,i+a,j+b) != bmpDC.GetPixel(a, b))
{
next = true;//找屏幕中下一个点
}
}
}
if (!next)//找到点
{
found = true;
result.Format("(%d,%d)",i,j);
return true;
break;
}
}
}
return false;
}
热心网友
时间：2023-10-14 15:39
