opencv3/C++繪制幾何圖形實例

2020-01-26 13:22:45

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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);  }}