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Showing posts from July, 2009

Better Gnome Desktop Magnification with eZoom

The Gnome desktop provides magnification with gnome-mag. This program has very limited features and has quite a few performance issues. After upgrading to Ubuntu Jaunty, we had trouble using the full screen magnification. Ever since I have been searching for a better magnification for partially sighted, low vision Gnome desktop users. The Compiz-Fusion's eZoom (Enhanced Zoom) desktop plugin steps in to fill the gap. The zooming is quite smooth, but its appears very jerky in this video. How to enable eZoom in Ubuntu Gnome Desktop? To use eZoom desktop plugin, first install the compiz-fusion-plugins-main package. This package is available in Ubuntu itself. Then open the Compiz Configuration Manager and enable "Enhanced Zoom Desktop" under Accessibility menu. Next step is to assign the keyboard shortcuts to zoom in and out. I have assigned Super+1 (Windows Key+1) to zoom in and Super+2 to zoom out.

NLTK Installation with Python easy_install

Few weeks ago I wrote the NLTK on Ubuntu Quick Start Guide. Now with the release of NLTK (Natural Language Toolkit) 2.0b5 today the NLTK installation has been greatly simplified thanks to the nltk python egg (See Changelog).To get started with NLTK install, you first need the python-setuptools package. $ sudo apt-get install python-setuptools Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: python-setuptools 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 195kB of archives. After this operation, 909kB of additional disk space will be used. Get:1 http://in.archive.ubuntu.com karmic/main python-setuptools 0.6c9-0ubuntu4 [195kB] Fetched 195kB in 9s (20.2kB/s) Selecting previously deselected package python-setuptools. (Reading database ... 106971 files and directories currently installed.) Unpacking python-setuptools …

GDM Timed Login

The Gnome Display Manager(GDM) is the graphical login program for Gnome Desktop environment. It is being completely rewritten, one of its goals is to provide better accessible login support. The latest version of GDM has been uploaded into Ubuntu Karmic and is under active testing. There are few issues to be ironed out before we can have a fully accessible login with orca screen reader and magnifier. Until then I advice the blind gnu/Linux users to use GDM timed login. Add the following lines to your /etc/gdm/custom.conf file to enable GDM timed login. Replace 'user' with your username.
[daemon] AutomaticLoginEnable=true AutomaticLogin=user TimedLoginEnable=true TimedLogin=user TimedLoginDelay=10
Please note that the configuration of GDM has moved away from previously single configuration file /etc/gdm/gdm.conf . As of now you can't use the graphic gdmsetup to configure GDM.

NLTK on Ubuntu Quick Start Guide

Update July 19, 2009 : You can now use nltk python egg instead, read the NLTK Installation with Python setuptools post.While attending a short program in computational linguistics at Dravidian University, Dr. Arul introduced me to NLTK (Natural Language Toolkit). It was full two years before that I finally decided to have a close look at it. Like most linguists at the lab I used Perl programming language. With new version of NLTK 2.0 released last month, NLTK now works with python 2.6. Here a quick start guide for NLTK on Ubuntu Linux. Installing NLTK on Ubuntu with Python 2.6At the time of writing this post the Debian package on NLTK download page is built for Python 2.5. Ubuntu ships with Python 2.6 by default. So you need to download the source package from the NLTK download page. NLTK needs some dependency modules, lets install them.
sudo apt-get install python-numpy python-matplotlib prover9Uncompress the source package and run the NLTK setup.
$ unzip nltk-2.0b3.zip
$ cd nltk…