# -*- coding:utf-8 -*-

from __future__ import division

from PIL import Image

import os

#按比例缩放

picdir = r'./pic'

file_list = os.walk(picdir)

thumbdir = r'./iphone5/'

ip5lo = 1136

ip5sh = 640

if not os.path.exists(thumbdir):

os.mkdir(thumbdir)

for root, dirs, files in file_list:

#print file

for file in files:

filedir = os.path.join(picdir,file)

img = Image.open(filedir)

imgSize = img.size

lo = max(imgSize)

sh = min(imgSize)

rate = lo/sh

newfiledir = os.path.join(thumbdir,file)

if sh > ip5sh or lo > ip5lo :

#此处亦有两种方法 sh2 = ip5lo/rate，再进行四种分类。

#可将两方法相比，计算收缩比率，收缩比率小的获胜，有必要时再如此处理吧。

lo2 = ip5sh*rate

print lo2

if lo2 > ip5lo and imgSize[0] > imgSize[1]:

new_img = img.resize((ip5lo,int(ip5lo/rate)),Image.ANTIALIAS)

elif lo2 > ip5lo and imgSize[0] < imgSize[1]:

new_img = img.resize((int(ip5lo/rate),ip5lo),Image.ANTIALIAS)

elif lo2 < ip5lo and imgSize[0] > imgSize[1]:

new_img = img.resize((int(lo2),ip5sh),Image.ANTIALIAS)

else:

new_img = img.resize((ip5sh,int(lo2)),Image.ANTIALIAS)

new_img.save(newfiledir,quality = 100)

else:

img.save(newfiledir,quality = 100)