OpenCV基本图形绘制之圆

先上代码

#include <iostream>
#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/videoio.hpp>
#include <opencv2/video.hpp>

using namespace cv;
using namespace std;

#define WINDOW_WIDTH 600//自定义窗口大小的宏 

void DrawFilledCircle(Mat img, Point center) {
	int thickness = -1;
	int lineType = 8;
	circle(img,
		center,
		WINDOW_WIDTH / 8,
		Scalar(0, 0, 255),
		thickness,
		lineType);
}

int main(int argc, char** argv)
{
	Mat img = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);

	DrawFilledCircle(img, Point(WINDOW_WIDTH/2, WINDOW_WIDTH/2));
	imshow("name1", img);
	waitKey(0);
	return 0;
}

效果

函数解析