Python 如何在树莓派上安装支持 JPEG 的 PIL？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/20176883/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how to install PIL with JPEG support on a raspberry pi?
提问by Marco Pashkov
I tried to install PILon my raspberry pi and read JPEG files. However, it does not work out of the box.
我试图在我的树莓派上安装PIL并读取 JPEG 文件。但是，它不是开箱即用的。
When I run the following:
当我运行以下命令时：
sudo pip install pil
I receive the following error, trying to open an Image:
我在尝试打开图像时收到以下错误：
""decoder jpeg not available""
While trying to install all needed JPEG libraries I ran into some errors e.g.:
在尝试安装所有需要的 JPEG 库时，我遇到了一些错误，例如：
sudo apt-get install libjpeg
E: Unable to locate package libjpeg
采纳答案by Marco Pashkov
You have to re-install PIL and also install the needed libraries as well as link them manually. This answer is based on this blog postfor a regular ubuntu PIL installation and this askubuntu question, where it is explained how to compile the jpeg encoding:
您必须重新安装 PIL 并安装所需的库以及手动链接它们。此答案基于此博客文章，用于常规 ubuntu PIL 安装和此askubuntu 问题，其中解释了如何编译 jpeg 编码：
### uninstall PIL
sudo pip uninstall pil
### download and compile the JPEG library
wget http://www.ijg.org/files/jpegsrc.v8c.tar.gz
tar xvfz jpegsrc.v8c.tar.gz
cd jpeg-8c
./configure --enable-shared --prefix=$CONFIGURE_PREFIX
make
sudo make install
### link the libraries correctly - RASPBERRY PI ONLY
sudo ln -s /usr/lib/arm-linux-gnueabi/libjpeg.so /usr/lib
sudo ln -s /usr/lib/arm-linux-gnueabi/libfreetype.so /usr/lib
sudo ln -s /usr/lib/arm-linux-gnueabi/libz.so /usr/lib
### install rest of the libraries, as well as freetrype and zlib
sudo apt-get install libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev
### re-install PIL
sudo pip install pil
hope that helps someone!
希望对某人有所帮助！
