mmdetection/convert_to_rgb.py

import cv2

import os,glob

from os import listdir,makedirs

from os.path import isfile,join
path = 'barcode_coco' # Source Folder
dstpath = 'barcode_coco_new' # Destination Folder
try:
    makedirs(dstpath)
except:
    print ("Directory already exist, images will be written in same folder")
# Folder won't used
files = list(filter(lambda f: isfile(join(path,f)), listdir(path)))
for image in files:
    try:
        img = cv2.imread(os.path.join(path,image))
        gray = cv2.cvtColor(img,cv2.COLOR_GRAY2RGB)
        dstPath = join(dstpath,image)
        cv2.imwrite(dstPath,gray)
    except:
        print ("{} is not converted".format(image))
for fil in glob.glob("*.png"):
    try:
        image = cv2.imread(fil) 
        gray_image = cv2.cvtColor(os.path.join(path,image), cv2.COLOR_BGR2GRAY) # convert to greyscale
        cv2.imwrite(os.path.join(dstpath,fil),gray_image)
    except:
        print('{} is not converted')