opencv（11） 画图形

	Mat mean, stddev;
	Mat redback = Mat::zeros(image.size(), image.type());
	redback = Scalar(40, 40, 200);
	meanStdDev(redback, mean, stddev);
	imshow("redback", redback);
	std::cout << "means:" << mean << std::endl;
	std::cout<< " stddev:" << stddev << std::endl;

means:[40;
 40;
 200]
 stddev:[0;
 0;
 0]

	RotatedRect rrt;
	rrt.center = Point(200, 200);
	rrt.size = Size(100, 200);
	rrt.angle = 45.0;
	ellipse(bg, rrt, Scalar(0, 255, 255), 2, 8);

 倾斜四十五度的椭圆