基本图形绘制

#include <opencv.hpp>
using namespace cv;
int main()
{
	// ----------------- 画椭圆 -----------------//
	Mat img(Size(200, 200), CV_8UC3, Scalar::all(255)); // 新建一个白色画布
	//double angle = 0; // 旋转角度为0°
	//int thickness = 2; // 线宽为2 
	//int lineType = 8; // 线型是8 
	//ellipse(img, Point(100, 100), Size(60, 30), angle, 0, 360, Scalar(255, 129, 0), thickness);
	//imshow("ellipse", img);
	// ------------------- 画实心圆 ------------------ // 
	int thickness = -1;
	circle(img, Point(100, 100), 30, Scalar(0, 0, 255), thickness);//将圆画在画布img 上
	imshow("实心圆", img);
	waitKey(0);
	
	return 0;
}