import os
import time
import cv2
def alter(path,object):
  result = []
  s = os.listdir(path)
  count = 1
  for i in s:
    document = os.path.join(path,i)
    img = cv2.imread(document)
    img = cv2.resize(img, (20,20))
    listStr = [str(int(time.time())), str(count)]
    fileName = ''.join(listStr)
    cv2.imwrite(object+os.sep+'%s.jpg' % fileName, img)
    count = count + 1
alter('C:\\imgDemo','C:\\imgDemo1')

import os
import time
from PIL import Image
def alter(path,object):
  s = os.listdir(path)
  count = 1
  for i in s:
    document = os.path.join(path,i)
    img = Image.open(document)
    out = img.resize((20,20))
    listStr = [str(int(time.time())), str(count)]
    fileName = ''.join(listStr)
    out.save(object+os.sep+'%s.jpg' % fileName)
    count = count + 1
alter('C:\\imgDemo','C:\\imgDemo1')