Python实现批量修改图片格式和大小的方法【opencv库与PIL库】_Python

本文实例讲述了Python实现批量修改图片格式和大小的方法。分享给大家供大家参考，具体如下：

第一种方法用到opencv库

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									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')

第二种方法用到PIL库

				?

									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')