13线段绘制

import cv2
import numpy as np
newImageInfo = (500,500,3)    #宽高500*500，3种颜色
dst = np.zeros(newImageInfo,np.uint8)   #定义一个黑色画布
# line
# 绘制线段 1 dst 2 begin 3 end 4 color
cv2.line(dst,(100,100),(400,400),(0,0,255))

# 5 line w  线段的宽度
cv2.line(dst,(100,200),(400,200),(0,255,255),20)

# 6 line type  线段的类型，可以使得线段光滑等
cv2.line(dst,(100,300),(400,300),(0,255,0),20,cv2.LINE_AA)

#绘制三角形
cv2.line(dst,(200,150),(50,250),(25,100,255))
cv2.line(dst,(50,250),(400,380),(25,100,255))
cv2.line(dst,(400,380),(200,150),(25,100,255))

cv2.imshow('dst',dst)
cv2.waitKey(0)