OpenCV Drawing a Line

How To Draw a Line In OpenCV Python?

To draw a line, we need to select the starting and ending coordinates of the line. First, let's create a black image and draw a green line. We need to use the code below to create a black image:

image = np.zeros((360,360,3), np.uint8)

Now we can create our line.

cv2.line(image,(0,0),(511,511),(0,255,0),5)

The code for creating a line is as follows:

import numpy as np
import cv2

image = np.zeros((360,360,3), np.uint8)

cv2.line(image,(0,0),(511,511),(0,255,0),5)

cv2.imshow("image",image)

cv2.waitKey(0)
cv2.destroyAllWindows()

Output:

Another Example

import numpy as np
import cv2

image = np.zeros((360,360,3), np.uint8)

cv2.line(image,(0,180),(360,180),(0,255,0),5)

cv2.imshow("image",image)

cv2.waitKey(0)
cv2.destroyAllWindows()

Output: