opencv中畫圓circle函數和橢圓ellipse函數

1.      void ellipse(InputOutputArray img, Point center, Size axes, double angle, double startAngle, double endAngle,  

                     const Scalar& color, int thickness = 1,   int lineType = LINE_8, int shift = 0);

ellipse函數將橢圓畫到圖像 lmg 上， 橢圓中心為點center，並且大小位於矩形 axes 內，橢圓旋轉角度為 angle， 擴展的弧度從 0 度到 360 度，

圖形顏色為 Scalar(x， y，z)，線寬 (thickness)為 1，線型(lineType)為 8 (8 聯通線型)。

2.     void circle(InputOutputArray img,  Point center,  int radius,  const Scalar& color,   int thickness = 1,   int lineType = LINE_8,  int shift = 0);

img :表示輸入的圖像  

center:  圓心坐標  

radius: 圓的半徑 

color：Scalar類型，表示圓的顏色，例如藍色為Scalar（255,0,0） 

thickness:線的寬度  

lineType：線的類型，（默認為8聯通型）

#include<iostream>
#include<opencv2/opencv.hpp>
using namespace cv;
using namespace std;

#define WINDOW_NAME1 "繪制圖1"
#define WINDOW_NAME2 "繪制圖2"
#define WINDOW_WIDTH 600    //定義窗口大小
string image = "C:\\Users\\asus\\Pictures\\Saved Pictures\\123.jpg";

void DrawEllipse(Mat img, double angle);
void DrawFi1ledCirc1e(Mat img, Point center);
int main()
{  
    Mat atomImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);
    Mat rookImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);
    //繪制橢圓
    DrawEllipse(atomImage, 90);
    DrawEllipse(atomImage, 0);
    DrawEllipse(atomImage, 45);
    DrawEllipse(atomImage, -45);

    //繪制圓心
    DrawFi1ledCirc1e(atomImage, Point(WINDOW_WIDTH / 2,WINDOW_WIDTH / 2));

    imshow(WINDOW_NAME1, atomImage);
    waitKey(0);
    return 0;
}
void DrawEllipse(Mat img, double angle) {
    int thickness = 2;
    int lineType = 8;
    ellipse(img, Point(WINDOW_WIDTH / 2, WINDOW_WIDTH / 2),
        Size(WINDOW_WIDTH / 4, WINDOW_WIDTH / 16), angle, 0, 360, Scalar(255, 129, 0),
        thickness, lineType);
}
void DrawFi1ledCirc1e(Mat img, Point center) {
    int thickness = -1;
    int lineType = 8;
    circle(img, center, WINDOW_WIDTH / 32, Scalar(0, 0, 255), thickness, lineType);
}