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在圖像上繪制幾何圖形
#include<iostream>
#include<opencv2/opencv.hpp>
using namespace cv;
Mat src1, dst;
void drawRectangle();
void drawLine();
void drawEllipse();
void drawCircle();
void tsxt();
int main()
{
src1 = imread("E:/image/image/daibola.jpg");
dst = src1.clone();
if(src1.empty())
{
printf("can not load image \n");
return -1;
}
drawRectangle();
drawLine();
drawEllipse();
drawCircle();
tsxt();
cvNamedWindow("output", CV_WINDOW_AUTOSIZE);
imshow("output", dst);
waitKey();
return 0;
}
void drawRectangle()
{
Rect rect = Rect(150,30,250,250);
Scalar color = Scalar(0,255,255);
rectangle(dst,rect,Scalar(0,255,255),2);
}
void drawLine()
{
line(dst, Point(450,0),Point(450,150),Scalar(255,0,50),2);
}
void drawEllipse()
{
ellipse(dst,Point(100,100),Size(50,90),0.0,0.0,360,Scalar(255,255,0),2);
}
void drawCircle()
{
circle(dst,Point(100,100),60,Scalar(255,0,255),2);
}
void tsxt()
{
putText(dst, "Image",Point(300,330),5,3.0,Scalar(255,0,90),2);
}
隨機繪制大小不等的圓：
#include<opencv2/opencv.hpp>
using namespace cv;
Mat dst, src1;
void randomCircle();
int main()
{
src1 = imread("E:/image/image/daibola.jpg");
dst = Mat::zeros(src1.size(),src1.type());
randomCircle();
return 0;
}
void randomCircle()
{
RNG rng(0);
Point p1;
int r;
for(int i =0; i < 10000; i++)
{
p1.x = rng.uniform(0, dst.cols);
p1.y = rng.uniform(0, dst.rows);
r = rng.uniform(0, dst.rows/3);
Scalar color = Scalar(rng.uniform(0,255), rng.uniform(0, 255), rng.uniform(0, 255));
if(waitKey(100) > 0)
{
break;
}
circle(dst,p1,r,color,2);
imshow("circle", dst);
}
}
以上這篇opencv3/C++繪制幾何圖形實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持億速云。
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