Prerequisites: Opencv
In this article, we will show how to display Multiple Images In One window using OpenCV in Python.
ApproachÂ
- Import module
- Load the Multiple images using cv2.imread()
- Concatenate the images using concatenate(), with axis value provided as per orientation requirement
- Display all the images using cv2.imshow()
- Wait for keyboard button press using cv2.waitKey()
- Exit window and destroy all windows using cv2.destroyAllWindows()
Functions Used
- cv2.imread(): reads an image file from the given specific location
- concatenate((image1,image2), axis): concatenates multiple images along a given mentioned axis (horizontal or vertical), The value of axis is given as 1 for combining them horizontally and 0 for combining them vertically.
- cv2.imshow(): displays an image in a window
- cv2.waitKey(): is a keyboard binding function. Its argument is the time in milliseconds. The function waits for specified milliseconds for any keyboard event.
- cv2.destroyAllWindows(): If you have multiple windows open and you do not need those to be open, you can use cv2.destroyAllWindows() to close those all.
Program:
Python3
import cv2import numpy as np  # Read First Imageimg1 = cv2.imread('GFG.png')  # Read Second Imageimg2 = cv2.imread('GFG.png')    # concatenate image HorizontallyHori = np.concatenate((img1, img2), axis=1)  # concatenate image VerticallyVerti = np.concatenate((img1, img2), axis=0)  cv2.imshow('HORIZONTAL', Hori)cv2.imshow('VERTICAL', Verti)  cv2.waitKey(0)cv2.destroyAllWindows() |
Input:
GFG.png
Output:
