"Maes showed a video of her student Pranav Mistry who she describes as the brains behind the project. Mistry wore the device on a lanyard around his neck, and colored Magic Marker caps on four fingers (red, blue, green and yellow) helped the camera distinguish the four fingers and recognize his hand gestures with software that Mistry created.
The gestures can be as simple as using his fingers and thumbs to create a picture frame that tells the camera to snap a photo, which is saved to his mobile phone. When he gets back to an office, he projects the images onto a wall and begins to size them." (Wired)
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