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Draw a line on an image using OpenCV
In this program, we will draw a simple line on an image using the OpenCV function line().
Original Image
Algorithm
Step 1: Import cv2. Step 2: Read the image using imread(). Step 3: Get the dimensions of the image using the image.shape method. Step 4: Define starting point of the line. Step 5: Define the end point of the line. Step 6: Define the thickness of the line. Step 7: Draw the line using the cv2.line() function and pass Step 3 to Step 4 as parameters.
Example Code
import cv2
image = cv2.imread('testimage.jpg')
height, width, channels = image.shape
startpoint = (0, 0)
endpoint = (height, width)
thickness = 9
color = (255, 0, 0)
image = cv2.line(image, startpoint, endpoint, color, thickness)
cv2.imshow('Line', image)Output
Explanation
As you can see, a blue line is drawn on the image.
Updated on: 17-Mar-2021
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