OpenCV学习6-绘制基本形状-线形 圆形 填充多边形等

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

using namespace cv;
using namespace std;

void DrawLine();//线段
void DrawRectangle(int x, int y, int width, int height);//矩形
void DrawEllipse();//椭圆
void DrawCircle();//圆形
void FillPolygon();//填充多边形

Mat img;

int main(int argc, char** argv)
{
	img = imread("D:/Learn/OpenCV/Info/PIC/zx.jpg");
	DrawLine();
	DrawRectangle(250, 130, 100, 100);
	DrawRectangle(555, 245, 100, 100);
	DrawRectangle(800, 210, 100, 100);
	DrawEllipse();
	DrawCircle();
	FillPolygon();
	putText(img, "ZHU XIAN", Point(500, 50), CV_FONT_HERSHEY_COMPLEX, 1.0, Scalar(0, 255, 255), 2, LINE_8);//已测试，本版本此处暂不能绘制中文
	imshow("新图像", img);

	waitKey(0);
	return 0;
}

void DrawLine()
{
	Point pStart = Point(500, 70);
	Point pEnd;
	pEnd.x = 660;
	pEnd.y = 70;
	Scalar color = Scalar(255, 0, 0);
	line(img, pStart, pEnd, color, 1, LINE_8);//斜线会有锯齿，LINE_AA可以反锯齿，但反据此会增大CPU开销，因此必要时再使用
}

void DrawRectangle(int x, int y, int width, int height)
{
	Rect rec = Rect(x, y, width, height);
	rectangle(img, rec, Scalar(0, 255, 0), 2, LINE_8);
}

void DrawEllipse()
{
	Point pCenter = Point(348, 393);//椭圆中心点
	Size axes = Size(240, 33);//长轴，短轴
	int angle = 0;//倾角
	int startAngle = 0;//起始角度
	int endAngle = 360;//结束角度
	Scalar color = Scalar(255, 0, 0);//颜色向量
	ellipse(img, pCenter, axes, angle, startAngle, endAngle, color, 2);
}

void DrawCircle()
{
	Point pCenter = Point(330, 353);//圆心坐标
	Scalar color = Scalar(255, 255, 0);//颜色向量
	int radius = 30;//半径
	circle(img, pCenter, radius, color, 2, LINE_8);
}

void FillPolygon()
{
	Point ptsArray[2][5];
	ptsArray[0][0] = Point(1120, 550);
	ptsArray[0][1] = Point(1170, 550);
	ptsArray[0][2] = Point(1170, 600);
	ptsArray[0][3] = Point(1120, 600);
	ptsArray[0][4] = Point(1120, 550);

	ptsArray[1][0] = Point(1145, 600);
	ptsArray[1][1] = Point(1120, 650);
	ptsArray[1][2] = Point(1170, 650);

	const Point* pPts[] = { ptsArray[0],ptsArray[1] };
	int count[] = { 5,3 };//每个多边形的坐标数量组成的数组
	Scalar color = Scalar(255, 0, 255);
	fillPoly(img, pPts, count, 2, color, LINE_8);
}

原始图像：

绘制后图像：