convert image rgb to grayscale opencv code example

Example 1: opencv grayscale to rgb

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

Example 2: convert image to grayscale opencv

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

Example 3: convert image to grayscale opencv

img_gray_mode = cv2.imread(path, cv2.IMREAD_GRAYSCALE)