img_resize.py

import os
from sys import argv
from scipy.misc import imread, imresize, imsave

input_dir = argv[1]
output_dir = './out/'
os.makedirs(output_dir, exist_ok=True)

filenames = sorted(os.listdir(input_dir))

for fn in filenames:
    img = imread(os.path.join(input_dir, fn))
    img = imresize(img, 0.7)
    imsave(output_dir + fn[:-4] + '.jpg', img)
    print(fn)