rgb to grayscale python opencv code example

Example 1: cv2 grayscale

gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

Example 2: opencv grayscale to rgb

backtorgb = cv2.cvtColor(gray,cv2.COLOR_GRAY2RGB)

Example 3: how to convert into grayscale opencv

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()

Example 4: rgb to grayscale python

from PIL import Image
img = Image.open('image.png').convert('LA')
img.save('greyscale.png')