OCRFeeder version 0.7.10

The previous OCRFeeder‘s version was released in April. I have been busy with Skeltrack and other projects but, between my personal time and Igalia‘s precious hackfest time, here we have a new version of the best Free Software OCR application.

For this 0.7.10 version I have improved the way that the document generators (the classes that generate the desired exportation formats) are used inside OCRFeeder. I have abstracted their use making it easy to add new document generators in the future.
The command line version, which has been limited to generating only the original exportation formats (ODT and HTML), also benefits from these changes; from this version on, it is possible to generate documents with any of the existing exportation format from the command line. For example, to generate a plain text file:

$ ocrfeeder-cli -i scan1.ppm -i scan2.jpeg -f TXT -o text_doc.txt

The current PDF exportation still has flaws that will take some time to fix but for now I have fixed a big issue: line wrap. The text lines would not wrap when written in the PDF document and so, long lines would go beyond the pages’ limits. This should be improved with this new version and I hope I have the time in the future to fix the other issues.

Moving (or swapping) pages by dragging them seems to have stopped working. This seems like a PyGTK bug but anyway it was the necessary excuse to implement actions for selecting and moving the pages using the menu or shortcuts. This will make the mentioned bug less important and also offers the possibility of moving pages easily to visually impaired users.

Screenshot of the select or move pages menus


I want to fix some issues in OCRFeeder’s architecture, especially in what comes to the UI part. This should probably be done together with a port the amazing GObject’s Introspection.
Jan Losinski, from TU Dresden, was kind enough to send me some patches that make the OCRFeeder’s recognition parallel. This feature needs to be polished but it will likely land in the next version of OCRFeeder.
Last but not least, I need to check how to make it easy to integrate the user’s language in the OCR recognition. I exchanged some emails with the people from AltLinux distro who seem to have already implemented this in their repositories but I need time to try and review their patches.


If you want to contribute and make this project better, fear not! The code is all Python and I’m available to help you get started so email me if you’re interested.

Enjoy OCRFeeder 0.7.10!

Source tarball

Skeltrack 0.1.8 released

Skeltrack, the Open Source library for skeleton tracking, keeps being improved here in Igalia and today we are releasing version 0.1.8.
Since July we have had the valuable extra help of Iago López who is doing an internship in Igalia’s Interactivity Team.

What’s new

Several bug fixes (including the introspection), both in the library and the supplied example were fixed.
The threading model was simplified and the skeleton tracking implementation was divided in several files for a better organized source code.

While the above is nice, the coolest thing about this release (and kudos to Iago for this) is that it makes Skeltrack work better with scenes where the user is not completely alone. The issue was that if there was another person or object (think chairs, tables, etc. for a real life example) was in the scene they would confuse the skeleton tracking. After this version, while not being perfect (objects/people cannot be touching the user), the algorithm will try to discard objects that are not the user.
But what about having two people in a scene, which one will it choose? To control this, we have introduced a new function:

skeltrack_skeleton_set_focus_point (SkeltrackSkeleton *skeleton,
gint x,
gint y,
gint z)

This function will tell Skeltrack to focus on the user closer to this point, thus allowing to focus on a user in real time by constantly changing this point to, for example, the user’s head position.
So, even if there is no multi-user support, the current API makes it easy to just run other instances of Skeltrack and try to pick users from other points in the scene.
It should also be easier to use Skeltrack for a typical installation where there is a user controlling something in a public space while other people are passing or standing by.


We will keep betting on this great library.
If you wanna help us, read the docs, check out Skeltrack’s GitHub and send us patches or open issues.

Django Workshop at Free Software Master 2012

Last weekend I gave my annual Django workshop for this year’s students of the Free Software Master that Igalia organizes.

When I started with Django it was 2007 and I was happy with its version 0.96 🙂
Currently with its version 1.4, the path that it took and the improvements it has got are incredible and it is used by many interesting companies and organizations.

My presentation for this year’s workshop covers more things and is based on Django 1.4.
You can check it out below, the license is Creative Commons as usual:

(direct link to presentation in SpeakerDeck)