python 3 PIL.Imageを使って画像にスタンプを貼る

from PIL import Image
import numpy
import os
path = os.getcwd()
#img = cv2.imread(path + '/Image/test_Image.png', cv2.IMREAD_GRAYSCALE)
img = Image.open(path + '/test2/resize.png')  #          

up_img = Image.new('L', (648, 12), 'white')  #    1024， 12   
down_img = Image.new('L', (648, 17), 'white')  #    1024， 17   
up_img.save(path + '/test2/up.png')
down_img.save(path + '/test2/down.png')

img.paste(up_img, (0, 0))  #     (0,0)     
img.paste(down_img, (0, 495))  #        

img.save(path + '/test2/chartlet.png')  #