PIL是python理想的图片处理module,但是想要良好的支持各种图片，还需要检查一下几个步骤，否则会提示：IOError:decoder jpeg not avilable之类的

第一步：安装zlib png freetype jpeg

 1.install zlib

 下载zlib,地址:http://blog.wandahai.com/static/source/zlib-1.2.5.tar.gz

$ tar -xvzf zlib-1.2.5.tar.gz
$ cd zlib-1.2.5
$ ./configure --prefix=/usr/local
$ make
$ make install

 2.install png

 下载png,地址:http://blog.wandahai.com/static/source/libpng-1.5.22.tar.gz

$ tar -xvzf libpng-1.5.6.tar.gz 
$ cd libpng-1.5.6
$ ./configure --prefix=/usr/local
$ make 
$ make install

 3.install freetype

  下载freetype,地址：http://blog.wandahai.com/static/source/freetype-2.4.7.tar.gz

$ tar -xvzf freetype-2.4.7.tar.gz 
$ cd freetype-2.4.7/
$ ./configure --prefix=/usr/local
$ make 
$ make install

 4.install jpeg

  下载jpeg,地址:http://blog.wandahai.com/static/source/jpegsrc.v8c.tar.gz

$ tar -xvzf jpegsrc.v8c.tar.gz
$ cd jpeg-8c/
$ ./configure --prefix=/usr/local
$ make 
$ make install

第二步：安装需要的devel库

$ apt-get install libjpeg8-dev 
$ apt-get install libpng12-dev
  
$ apt-get install libfreetype6-dev
  
$ apt-get install zlib1g-dev

第三部：安装PIL

下载Imaging,地址:http://blog.wandahai.com/static/source/Imaging-1.1.7.tar.gz

$ tar -xvzf Imaging-1.1.7.tar.gz
$ cd Imaging-1.1.7/
$ vim setup.py
修改如下： 
JPEG_ROOT = "/usr/local/lib"
ZLIB_ROOT = "/usr/local/lib"
FREETYPE_ROOT = "/usr/local/lib"

检查是否支持:

$ python setup.py build_ext -i
running build_ext
--------------------------------------------------------------------
PIL 1.1.7 SETUP SUMMARY
--------------------------------------------------------------------
version 1.1.7
platform linux2 2.7.1+ (r271:86832, Apr 11 2011, 18:13:53)
[GCC 4.5.2]
--------------------------------------------------------------------
*** TKINTER support not available
--- JPEG support available         -----------------------> OK！ 
--- ZLIB (PNG/ZIP) support available -----------------------> OK！ 
--- FREETYPE2 support available ----------------------->  OK！ 
*** LITTLECMS support not available
--------------------------------------------------------------------
To add a missing option, make sure you have the required
library, and set the corresponding ROOT variable in the
setup.py script.
To check the build, run the selftest.py script.

正式安装:

$ python setup.py build
$ python setup.py install

最后:

$ echo '/usr/local/lib' >> /etc/ld.so.conf
$ ldconfig

最后一步:验证

#!/usr/bin/env python  
# -*- coding:utf-8 -*-  
  
import Image  
picPath = '～/images/1212.jpg'  
  
im = Image.open(picPath)  
print im.getbbox()

输出结果图片：

(0, 0, 600, 715)