pathC = './cityscape/'
dirs = os.listdir(pathC)

#Resize para o pathC np.array

def resize():
    path = pathC
    os.path.exists(path)
    orig = cv2.imread('./cityscape/')
    for img in dirs:
        if os.path.isfile(path+img):
            img = cv2.imread(path+img)
            img2 = np.array(cv2.resize(img,(512,512)))
            gray = cv2.cvtColor(img, cv2.COLOR_BRG2GRAY)

resize()

AttributeError: module 'cv2.cv2' has no attribute 'COLOR_BRG2GRAY'