import cv2 
import numpy as np 
from matplotlib import pyplot as plt
import jovian
import sys 
%matplotlib inline

img = cv2.imread('elon.jpg')

img.shape

plt.imshow(img[:,:,::-1])   # img[::-1] ---> all items in the array, reversed --> BGR to RGB
plt.show()

img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)