In this tutorial, we will learn how to concatenate images vertically and horizontally using python opencv.

1. Import library

import numpy
import cv2

2. Read an image using opencv

img = cv2.imread('C:/Users/N/Desktop/Test.jpg')

3. Concatenate images vertically

verticalAppendedImg = numpy.vstack((img,img))

4. Concatenate images horizontally

horizontalAppendedImg = numpy.hstack((img,img,img))

5. Show final images

cv2.imshow('Vertical Appended', verticalAppendedImg)
cv2.imshow('Horizontal Appended', horizontalAppendedImg)
 
cv2.waitKey(0)
cv2.destroyAllWindows()