在图像上绘制几何图形

#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);}

随机绘制大小不等的圆：

#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); }}

以上这篇opencv3/C++绘制几何图形实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。