删除相同图片,Python实现

1. 原理:读取图片二进制码,使用MD5或SHA-1散列,生成图片唯一编码,与图片字典做比对,存在则图片重复,移除.
2. Python实现:

   import os
   import re
   import hashlib
   from time import time
   
   rootPath = 'F:/Image/照片'
   backupPath = 'F:/Image/backup'
   picDic = {}
   regular = re.compile(r'^(.*)\.(jpg|jpeg|bmp|gif|png|JPG|JPEG|BMP|GIF|PNG)$')
   
   def RemoverRePic(dirPath):
       quantity = 0
       for childPath in os.listdir(unicode(dirPath)):
           childPath = dirPath + '/'  + childPath
           if os.path.isdir(childPath):
               quantity =+ RemoverRePic(childPath)
           else:
               if regular.match(childPath):
                   pic = open(childPath, 'rb')
                   picMd5 = hashlib.md5(pic.read()).hexdigest()
                   pic.close()
                   if picDic.has_key(picMd5):
                       newPath = backupPath + '/'  + hashlib.md5(childPath)\
                       .hexdigest() + childPath[childPath.find('.'):]
                       os.rename(childPath, newPath)
                       quantity =+ 1
                   else:
                       picDic[picMd5] = childPath
       return quantity
   
   if __name__ == '__main__':
       t = time()
       print 'start:'
       print t
       print RemoverRePic(rootPath)
       print 'end:'
       print time() - t