CODE EXAMPLE FOR PYTHON

show image with ratio opencv python

import cv2

# load the image, clone it, and setup the mouse callback function
image = cv2.imread('1.jpg')
cv2.namedWindow('image', cv2.WINDOW_KEEPRATIO)
# keep looping until the 'q' key is pressed
while True:
    # display the image and wait for a keypress
    cv2.imshow('image', image)
    key = cv2.waitKey()

    if key == 27:
        break

# close all open windows
cv2.destroyAllWindows()