cv2.line_img.py 画线

画线
要画一条线，你只需要告诉函数这条线的起点和终点。我们下面会画一条
从左上方到右下角的蓝色线段。

cv2.line_img.py

import numpy as np
import cv2

# Create a black image
img=np.zeros((512,512,3), np.uint8)

# Draw a diagonal blue line with thickness of 5 px
cv2.line(img,(0,0),(511,511),(0,0,255),1)
cv2.line(img,(0,256),(511,256),(0,255,0),1)
cv2.line(img,(0,511),(511,0),(255,0,0),1)

cv2.namedWindow('image', cv2.WINDOW_NORMAL)
cv2.imshow('image',img)
cv2.waitKey()
cv2.destroyAllWindows()