ubuntu 下安装 PyTesser 进行OCR识别

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本文介绍了在Ubuntu操作系统中安装PyTesser进行OCR识别的步骤，首先需要安装依赖库leptonica，接着安装Tesseract及其语言包，最后安装PyTesser，以便在32位和64位系统上使用Python进行OCR处理。

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pytesser 调用了 tesseract，因此需要安装 tesseract，安装 tesseract 需要安装 leptonica

安装列表：

leptonica

tesseract 以及 tesseract 语言包

pytesser

错误：

IOError: decoder zip not available

方法一：有可能不成功

Then, on 32-bit Ubuntu, you should run:

sudo ln -s /usr/lib/i386-linux-gnu/libfreetype.so /usr/lib/
sudo ln -s /usr/lib/i386-linux-gnu/libz.so /usr/lib/
sudo ln -s /usr/lib/i386-linux-gnu/libjpeg.so /usr/lib/

Otherwise, on 64-bit Ubuntu, you should run:

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/
sudo ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/

方法二：

修改 setup.py 搜索 /usr/lib/添加

/usr/lib/x86_64-linux-gnu/

参考：

# rm -rf /usr/local/lib/python2.7/site-packages/PIL*
# rm -rf /src/Imaging-1.1.7
# cd /src
# tar -xvzf Imaging-1.1.7.tar.gz
# cd Imaging-1.1.7
# python2.7 setup.py build_ext -i
# python2.7 selftest.py
# python2.7
>>> import _imaging
>>> [(k, v) for k, v in vars(_imaging).items() if k[0] == 'z']
#Confirmed that the zip decoder libs were there
# python2.7 setup.py install

In trying to retrace my steps to figure out where I went wrong, I think
I used the "simple" install method listed at the top of the README (0.
If you're in a hurry...) first. All the supporting libraries were in
place in their standard locations so I figured I was safe for the simple
install. Note to self...) ;)

Anyway, i remember that this failed to find 3/5 libraries. It appears
that the build process does not check /usr/lib64 by default (which is
one of the default locations for libraries on a Linux x64 system. So, I
updated setup.py with the necessary paths to the libs.

I believe I then tried a "setup.py clean" command to reset the build
directories... Something along those lines. In any case, it appears I
did not get the original failed install out of the system when I thought
I had and that is what was tripping me up all along.

http://python.6.x6.nabble.com/IOError-decoder-zip-not-available-td2098797.html

IOError: [Errno 2] No such file or directory: 'tesseract.log'

安装语言包 English language data for Tesseract (3.00 and up)

安装教程：

http://hi.baidu.com/cannotforget/item/fceb34f4fb4f1218e2e3bdc9

http://www.hulufei.com/tag/python

http://www.cnblogs.com/congbo/archive/2012/10/31/2746943.html

http://www.oschina.net/question/54100_59400