本文主要是介绍8、OpenCV4.4绘图-圆，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
cv2.circle(empty,center,radius,color,thickness)
# -*- coding: utf-8 -*-
import cv2
import numpy as np
empty = np.zeros([300,500],np.uint8)
x,y=empty.shape
center=tuple([x/3,y/3])
#tuple要转换为元组的序列
radius = 100
thickness = 2
color=list([255,0,0])
cv2.circle(empty,center,radius,color,thickness)
#望文其意
cv2.imshow('plane',empty)
k=cv2.waitKey(0)&0xff
print k
if k==27: cv2.destroyAllWindows()
elif k==ord('s'):cv2.imwrite('mypicture.png',img) cv2.destroyAllWindows()
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