I decided to use a traditional marker here as the scene had too much visual noise for image recognition with all the foot and car traffic. Markers on my iPod Touch load different levels of detail 3D models of this one building. Clicking on the model binds it to a viewpoint so the marker is no longer needed.
The example in the video is built on a 'mixed reality' framework that allows interactive models to be accessed by virtual and augmented reality applications. I will be sharing more of my work, application examples, and videos about this framework in the coming months.