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-8import imageimport urllib2import stringioimport 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 eif __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)
复制代码 代码如下: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
复制代码 代码如下: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
复制代码 代码如下: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
复制代码 代码如下: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。