During 2012 I collaborated with Julian Oliver and Damian Stwewart developing the Android version of The Artvertiser project which then became the default software for the original version.
The Artvertiser is a software platform for replacing billboard advertisements with art in real-time. It works by teaching computers to 'recognise' individual advertisements so they can be easily replaced with alternative content, like images and video.
Rather than refering to this as a form of Augmented Reality technology, we consider The Artvertiser an example of Improved Reality.
The project was initiated by Julian Oliver in February 2008 and has been developed in collaboration with Damian Stewart and Arturo Castro (Android port/rewrite). It has appeared in full working form in street exhibitions in Berlin as part of Transmediale 2010, in Brussels for the Europe wide Media Facades Festival, in four inner-city walks during Rotterdam's Image Festival and in Helsinki as part of an M-CULT public event and workshop.
The Artvertiser is also a free-software project and runs on Linux, Windows, OS X and Android systems.