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- 画线cv2.line(
- 画圆cv2.circle()
- 画矩形cv2.rectangle()
- 画椭圆cv2.ellipse()
- 添加文本cv2.putText()
import numpy as np
import cv2
#画一条直线
img = np.zeros((512,512,3),np.uint8)
cv2.line(img,(0,0),(511,511),(0,0,255),5)
#画一个矩形
cv2.rectangle(img,(300,0),(510,250),(0,255,0),3)
#画一个园
cv2.circle(img,(200,80),80,(255,0,0),-1)
#画一个椭圆
cv2.ellipse(img,(100,400),(100,50),0,0,360,100,-1)
#画一个多边形
pts = np.array([[10,5],[20,30],[70,20],[50,10]], np.int32)
pts = pts.reshape((-1,1,2))
cv2.polylines(img,[pts],False,(0,255,255))
#在图片上添加文字
font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img,'Don',(10,500), font, 4,(255,255,255),2,cv2.LINE_AA)
winname = 'drawing'
cv2.namedWindow(winname)
cv2.imshow(winname,img)
cv2.waitKey(0)
cv2.destroyWindow(winname)