opencv 添加 线条 矩形 椭圆 圆 多边形_python

import cv2 as cv
import numpy as np

img = np.zeros((480,640,3),np.uint8)
b,g,r = cv.split(img)
b[:] = 250
g[:] = 250
r[:] = 250
img2 = cv.merge((b,g,r))

# 绘制线条
cv.line(img2,(0,0),(300,300),(0,255,0),5,4)
cv.line(img2,(40,0),(340,300),(0,0,255),5,16)
# 绘制矩形
cv.rectangle(img2,(10,40),(70,0),(255,255,0),-1)
# 绘制园
cv.circle(img2,(320,240),100,(255,255,0))
# 绘制椭圆
cv.ellipse(img2,(320,240),(100,50),30,0,180,(0,255,0))

# 绘制多边形
pts = np.array([(300,10),(150,100),(450,100)],np.int32)
print(pts)
cv.polylines(img2,[pts],True,(0,0,255))

# 填充多边形
cv.fillPoly(img2,[pts],(0,0,255))
# 画文本
cv.putText(img2,'hello world',(0,100),cv.FONT_HERSHEY_DUPLEX,3,(255,0,0))

cv.imshow('draw',img2)
cv.waitKey(0)