import numpy as np
import cv2

def Test1():
    # Create a black image
    img = np.zeros((600,800,3), np.uint8)

    # Draw a diagonal blue line with thickness of 5 px
    img = cv2.line(img,(0,0),(639,479),(255,0,0),5)
    img = cv2.rectangle(img,(384,0),(510,128),(0,255,0),3)
    img = cv2.circle(img,(447,63), 63, (0,0,255), -1)
    img = cv2.ellipse(img,(256,256),(100,50),0,0,180,255,-1)

    pts = np.array([[10,5],[20,30],[70,20],[50,10]], np.int32)
    pts = pts.reshape((-1,1,2))
    img = cv2.polylines(img,[pts],True,(0,255,255))

    font = cv2.FONT_HERSHEY_SIMPLEX
    cv2.putText(img,'OpenCV',(10,500), font, 4,(255,255,255),2,cv2.LINE_AA)


    cv2.imshow('drawing', img)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

if __name__ == "__main__":
    Test1()