Is it possible to have black and white and color image on same window by using opencv?

Question

Is it possible to have black-and-white and color image on same window by using opencv libraray? How can I have both of these images on same window?

Answer 1

Small improvement to the code with modern writing

concatenate

instead of

hstack

that is discontinued (stack can also be used)

import cv2
import numpy as np

im = cv2.imread('kick.jpg')
img = cv2.imread('kick.jpg',0)

# Convert grayscale image to 3-channel image,so that they can be stacked together    
imgc = cv2.cvtColor(img,cv2.COLOR_GRAY2BGR)
both = np.concatenate((im,imgc), axis=1)   #1 : horz, 0 : Vert. 

cv2.imshow('imgc',both)
cv2.waitKey(0)
cv2.destroyAllWindows()