opencv python版-lesson 03

画曲线,圆,椭圆

import cv2
import numpy as np
img = np.zeros((512,512,3), np.uint8)
cv2.line(img,(0,0),(511,511),(255,0,0),5)
cv2.rectangle(img,(384,0),(510,128),(0,255,0),3)
cv2.circle(img,(447,63),63,(0,0,255),-1)
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))
font=cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img,'drawing',(10,500),font,4,(255,255,255),2)
cv2.namedWindow('drawing',cv2.WINDOW_NORMAL)
cv2.imshow('drawing',img)
cv2.waitKey(0)
cv2.destroyAllWindows('drawing')