Python改变图片的大小

import os
from PIL import Image

# filename = os.listdir("D:\\Work\\process\\样本处理\\polyu-all-train")
# base_dir = "D:\\Work\\process\\样本处理\\polyu-all-train\\"
# new_dir = "D:\\Work\\process\\样本处理\\polyu\\"

filename = os.listdir("./dice")
base_dir = r"./dice/"    ## ..有什么不同
new_dir = r"./dice2/"

for img in filename:
    image = Image.open(base_dir + img)
    size_m, size_n = image.size
    size_m = int(size_m * 10)
    size_n = int(size_n * 10)
    image_size = image.resize((size_m, size_n), Image.ANTIALIAS)
    image_size.save(new_dir + img)