本文实例讲述了python使用Image处理图片常用技巧。分享给大家供大家参考。具体分析如下:
使用python来处理图片是非常方便的,下面提供一小段python处理图片的代码,需要安装图像处理工具包PIL(Python Image Library)。
#coding=utf-8 import Image import urllib2 import StringIO import os #改变图片大小 def resize_img(img_path): try: img = Image.open(img_path) (width,height) = img.size new_width = 200 new_height = height * new_width / width out = img.resize((new_width,new_height),Image.ANTIALIAS) ext = os.path.splitext(img_path)[1] new_file_name = '%s%s' %('small',ext) out.save(new_file_name,quality=95) except Exception,e: print e #改变图片类型 def change_img_type(img_path): try: img = Image.open(img_path) img.save('new_type.png') except Exception,e: print e #处理远程图片 def handle_remote_img(img_url): try: request = urllib2.Request(img_url) img_data = urllib2.urlopen(request).read() img_buffer = StringIO.StringIO(img_data) img = Image.open(img_buffer) img.save('remote.jpg') (width,height) = img.size out = img.resize((200,height * 200 / width),Image.ANTIALIAS) out.save('remote_small.jpg') except Exception,e: print e if __name__ == '__main__': img_path = 'test.jpg' resize_img(img_path) change_img_type(img_path) img_url = 'http://img.hb.aicdn.com/042f8a4a70239f724ff7b9fa0fc8edf18658f41022ada-WcItWE_fw554' handle_remote_img(img_url)
可能会遇到的问题
ImportError: No module named Image
解决办法:安装Python Imaging Library(PIL)
sudo easy_install PIL
安装PIL出现:
— JPEG support not available
— ZLIB (PNG/ZIP) support not available
— FREETYPE2 support not available
操作jpeg图片和png图片出现:
IOError: decoder jpeg not available 和 IOError: encoder zip not available
解决办法:
(1) 删除已经安装的PIL
sudo rm -rf /usr/local/lib/python2.6/site-packages/PIL-1.1.7-py2.6-linux-x86_64.egg/
(2) 安装相关库
sudo apt-get install libjpeg8 libjpeg62-dev libfreetype6 libfreetype6-dev
sudo ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/
sudo ln -s /usr/lib/x86_64-linux-gnu/libfreetype.so /usr/lib/
sudo ln -s /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/
(3) 重新安装PIL
sudo easy_install PIL
终端出现:
— JPEG support available
— ZLIB (PNG/ZIP) support available
— FREETYPE2 support available
现在试试,已经ok了
希望本文所述对大家的Python程序设计有所帮助。
本文python使用Image处理图片常用技巧分析到此结束。相信自己,我们一定行的,未来的路上有你也有我!小编再次感谢大家对我们的支持!