包围轮廓的矩形边界 opencv

 #include<opencv2/opencv.hpp>
 #include<iostream>

 using namespace std;
 using namespace cv;

 int main()
 {
     Mat image(, , CV_8UC3);  //创建一个600*600 8位无符号字符型的3通道图像
     RNG& rng = theRNG();     ////用其引用来接收theRNG函数返回的随机数生成器

     while ()
     {
         char key; // 键值
         int count = rng.uniform(,);//随机生成点的数量3-103
         vector<Point>points;  //二维点集存在这个向量里面

         for (int i = ; i < count; i++)   //点的坐标
         {
             Point point;
             point.x = rng.uniform(image.cols / , image.cols *  / );
             point.y = rng.uniform(image.rows / , image.cols *  / );
             points.push_back(point);  //生成的点放进points这个向量里面
         }
         //寻找最小面积的包围矩形
         RotatedRect box = minAreaRect(Mat(points));
         Point2f vertex[];
         box.points(vertex);

         image = Scalar::all();//初始化图像为全黑色
         //随机化点的颜色 并画出
         for (int i = ; i < count; i++)
         {
             circle(image, points[i], , Scalar(rng.uniform(, ), rng.uniform(, ), rng.uniform(, )), FILLED, LINE_AA);
         }
         for (int i = ; i < ; i++)
         {
             line(image, vertex[i],vertex[(i+)%], Scalar(, , ), , LINE_AA);
         }
         //显示效果图
         imshow("矩形包围示例", image);
         //按下ESC退出程序
         key = (char)waitKey();
         if (key == )
             break;
     }

     return ;
 }