I developed the concept.
One of the most important cornerstones of this project was context and placing. Our stakeholders specifically requested an installation that would work after shopping hours. We had to make sure to create something that would grab enough attention to interest people who are not thinking about shopping at all at that point. It would also have to remain engaging enough to help people remember about DesignerCafe the following day.
I guided the development of software & hardware.
We developed our own custom software and hardware for this project. By use of a camera with infrared filter and a strong infrared light we used blob-tracking software technology to make a very subtle interaction possible without screens, buttons or other specific interactive objects. The result of this is that passers-by would start interacting with the shopping window even before they were aware of it, making it almost seem like 'magic'.
Interest should be rewarded.
I wanted to engage passers-by who showed the potential to become future customers. So I created what I called the 'sweetspot'. Users standing on the 'sweetspot' longer than a few seconds were rewarded with additional music, lighting and a call-to-action trigger that invited users to visit the website.