OpenCV绘制几何图形

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

using namespace cv;
using namespace std;

Mat bgImage;
const char* path = "C:/Users/Administrator/Desktop/1.jpg";
const char* window_name = "load image";

void MyLines();
void MyRectangle();
void MyEllipse();
void MyCircle();
void MyPolygon();
void RandomLine();

int main(int argc, char** argv)
{
    bgImage = imread(path);
if (bgImage.empty())
    {
cout << "could not load.." << endl;
return -1;
    }

/*MyLines();
 MyRectangle();
 MyEllipse();
 MyCircle();
 MyPolygon();

 putText(bgImage, "Hello OpenCV", Point(100, 300), CV_FONT_HERSHEY_COMPLEX, 1.0, Scalar(255, 0, 0), 2, 8);*/
//imshow(window_name, bgImage);
    RandomLine();
    waitKey(0);
return 0;
}

//画线
void MyLines()
{
    Point p1 = Point(20, 30);
    Point p2;
    p2.x = 300;
    p2.y = 300;
    Scalar color = Scalar(0, 0, 255);
    line(bgImage, p1, p2, color, 2, LINE_8);
}

//画矩形
void MyRectangle()
{
    Rect rect = Rect(200, 100, 200, 200);
    Scalar color = Scalar(255, 0, 255);
    rectangle(bgImage, rect, color, 2, LINE_8);
}

//画椭圆
void MyEllipse()
{
    Scalar color = Scalar(0, 255, 0);
//ellipse(背景图，中心，长轴短轴，倾斜程度，弧范围，颜色，线）
    ellipse(bgImage, Point(bgImage.cols / 2, bgImage.rows / 2), Size(bgImage.cols / 4, bgImage.rows / 8), 90, 0, 360, color, 2, LINE_8);
}

//画圆
void MyCircle()
{
    Scalar color = Scalar(0, 255, 255);
    Point center = Point(bgImage.cols / 2, bgImage.rows / 2);
    circle(bgImage, center, 150, color, 2, LINE_8);
}

//填充
void MyPolygon()
{
    Point pts[1][5];
    pts[0][0] = Point(100, 100);
    pts[0][1] = Point(100, 200);
    pts[0][2] = Point(200, 200);
    pts[0][3] = Point(200, 100);
    pts[0][4] = Point(100, 100);

const Point* ppts[] = { pts[0] };
int npt[] = { 5 };
    Scalar color = Scalar(255, 12, 255);

    fillPoly(bgImage, ppts, npt, 1, color, 8);
}

//生成随机数
void RandomLine()
{
    RNG rng(12345);
    Point pt1;
    Point pt2;
    Mat bg = Mat::zeros(bgImage.size(), bgImage.type());
for (int i = 0; i < 1000; i++)
    {
        pt1.x = rng.uniform(0, bgImage.cols);
        pt2.x = rng.uniform(0, bgImage.cols);
        pt1.y = rng.uniform(0, bgImage.rows);
        pt2.y = rng.uniform(0, bgImage.rows);
        Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));
if (waitKey(50) > 0)
        {
break;
        }
        line(bg, pt1, pt2, color, 1, 8);
        imshow("random line", bg);
    }
}