import cv2
import numpy as np
import matplotlib.pyplot as plt


img = cv2.imread('car.jpg', cv2.IMREAD_GRAYSCALE)
#cv2.imshow('image',img)
#cv2.waitKey(0)
#cv2.destroyAllWindows()

#cv2.imshow('image', img)
#cv2.waitKey(0)
#cv2.destroyAllWindows()

#plt.imshow(img, cmap='gray', interpolation='bicubic')
#plt.plot([50,100],[80,100], 'c', linewidth=5)
#plt.show()

cv2.imwrite('cargray.png', img)