Time for a little technology update. Here is an application/technology that uses a web cam. The application “recognizes” a card, like a business card then uses what it knows about the card like size position recognizable patterns to project an image on the card. It’s not really on the card, but when you watch it on your computer screen it looks like it’s on the card.
Confused? here are two implementations of this technology – enjoy
http://vimeo.com/moogaloop.swf?clip_id=4979525&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1
You have to go to the Engadget web page to see this other one, but it gives you a better idea of how it works. click here