ycbr in opencv converter code example

Example 1: opencv grayscale to rgb

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

Example 2: cv2 lab to rgb

#python 
brightLAB = cv2.cvtColor(bright, cv2.COLOR_BGR2LAB)
darkLAB = cv2.cvtColor(dark, cv2.COLOR_BGR2LAB)