1 #include<opencv2/opencv.hpp> 2 #include<iostream> 3 4 using namespace std; 5 using namespace cv; 6 7 int main() 8 { 9 Mat image(600, 600, CV_8UC3); //创建一个600*600 8位无符号字符型的3通道图像 10 RNG& rng = theRNG(); ////用其引用来接收theRNG函数返回的随机数生成器 11 12 while (1) 13 { 14 char key; // 键值 15 int count = rng.uniform(3,103);//随机生成点的数量3-103 16 vector<Point>points; //二维点集存在这个向量里面 17 18 for (int i = 0; i < count; i++) //点的坐标 19 { 20 Point point; 21 point.x = rng.uniform(image.cols / 4, image.cols * 3 / 4); 22 point.y = rng.uniform(image.rows / 4, image.cols * 3 / 4); 23 points.push_back(point); //生成的点放进points这个向量里面 24 } 25 //寻找最小面积的包围矩形 26 RotatedRect box = minAreaRect(Mat(points)); 27 Point2f vertex[4]; 28 box.points(vertex); 29 30 image = Scalar::all(0);//初始化图像为全黑色 31 //随机化点的颜色 并画出 32 for (int i = 0; i < count; i++) 33 { 34 circle(image, points[i], 3, Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255)), FILLED, LINE_AA); 35 } 36 for (int i = 0; i < 4; i++) 37 { 38 line(image, vertex[i],vertex[(i+1)%4], Scalar(255, 255, 255), 2, LINE_AA); 39 } 40 //显示效果图 41 imshow("矩形包围示例", image); 42 //按下ESC退出程序 43 key = (char)waitKey(); 44 if (key == 27) 45 break; 46 } 47 48 return 0; 49 }
