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INSTALLATION.md

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RHEL 6.6

Pillow and image libraries

See http://pillow.readthedocs.org/en/latest/installation.html

Install libraries:

sudo yum install libtiff-devel libjpeg-devel libzip-devel freetype-devel \
    lcms2-devel libwebp-devel tcl-devel tk-devel

For JPEG2000 support the RedHat openjpeg libraries are too old to be supported by Pillow -- they are 1.3 and Pillow requires 2.0 or 2.1. Thus if JPEG2000 support is required then the openjpeg libraries must be installed from elsewhere. This is very easy direct from the openjpeg github site. Compilation requires cmake which is available from RedHat:

sudo yum install cmake
git clone git@github.com:uclouvain/openjpeg.git
cd openjpeg/
cmake -DCMAKE_INSTALL_PREFIX=/usr .
make
sudo make install

## Problem with install using openjpeg libraries is that when PIL (Pillow) is loaded
## by Python it can't find the openjpeg libraries (either in default /usr/local/lib 
## or /usr/lib as with -D flag above). Ugly fix is to set LD_LIBRARY_PATH for the 
## environment running the code. Should be a way around this though...

export LD_LIBRARY_PATH=/usr/lib:$LD_LIBRARY_PATH

Can then install Pillow:

sudo pip install Pillow

Pillow should then support all the image formats we need (including JPEG2000 if openjpeg was installed. The image formats are displayed in a table at then end of the install:

--------------------------------------------------------------------
    PIL SETUP SUMMARY
    --------------------------------------------------------------------
    version      Pillow 2.9.0
    platform     linux2 2.6.6 (r266:84292, Nov 21 2013, 10:50:32)
                 [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]
    --------------------------------------------------------------------
    *** TKINTER support not available
    --- JPEG support available
    --- OPENJPEG (JPEG2000) support available (2.1)
    --- ZLIB (PNG/ZIP) support available
    --- LIBTIFF support available
    --- FREETYPE2 support available
    --- LITTLECMS2 support available
    --- WEBP support available
    --- WEBPMUX support 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.

(If openjpeg libraries were not installed then there will be a *** on the line for JPEG2000 support but everything else will work fine.)

RHEL 6.5

Was same as RHEL 6.6 above. When I did this in 2014 the current version of Pillow was 2.6.0. Did not try compiling openjpeg libraries for JPEG2000 support.