Magic mirror
Also called Virtual Fashion, Hypersoft’s vision for retail-focused kiosk consisted of a high luminosity LCD panel mounted on the back of a two-way mirror.
The user could interact with it just by waving his hands, even meters away from the kiosk. The software was constantly polling a proximity sensor that, when hit an obstacle at a target distance range, would start the main app’s process.
Usually the screen would just display a black picture so that from the other side of the mirror it seemed that nothing was behind it. When previously mentioned process started, the software started two different processes: the first would start recording wathever was happening in front of the kiosk; the other one played a simple video inviting the user to move.
Technically speaking, the challenges in developing such solution were mostly tied to multithreading and playing/recording high framerate video streams. Being this a R&D project, the budget was limited and had to rely on freely available libraries or system APIs (DirectShow).