text: #include <opencv2/opencv.hpp>
  #include <iostream>
  
  using namespace cv;
  using namespace std;
  
  int main(int argc, char** argv)
  {
  	// Create blank white color Image with size 256x256
  	Mat img(512, 512, CV_8UC3, Scalar(0, 0, 0));
  	line(img, Point(0, 0), Point(511, 511), Scalar(0, 255, 0), 7);
  	rectangle(img, Point(384, 0), Point(510, 128), Scalar(255, 255, 0), 5);
  	circle(img, Point(447, 63), 63, Scalar(0, 0, 255), -1);
  	ellipse(img, Point(256, 256), Point(100, 100), 0, 0, 180, 255, -1);
  	putText(img, "OpenCV!", Point(10, 500), FONT_HERSHEY_SIMPLEX, 3, Scalar(255, 255, 255), 5, 8);
  	// Name of the window
  	String win_name = "Blank Blue Color Image";
  	// Create a window
  	namedWindow(win_name);
  	// Show our image inside the created window.
  	imshow(win_name, img);
  	// Wait for any keystroke in the window
  	waitKey(0);
  	// destroy the created window
  	destroyWindow(win_name);
  	return 0;
  }
  