CV2 Grayscale
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
Terrible Tiger
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
import cv2
# Reading color image as grayscale
gray = cv2.imread("color-img.png",0)
# Showing grayscale image
cv2.imshow("Grayscale Image", gray)
# waiting for key event
cv2.waitKey(0)
# destroying all windows
cv2.destroyAllWindows()