Technology

Within the installation a camera-based tracking system tells the main computer where people are walking and predicts the place where they will travel to in the immediate future. The system automatically points 14 robotically-controlled projectors to the locations where they will intercept the trajectory of pedestrians and cues a sequence of video for them.

 

By using projectors on motorised pan-tilt platforms, very large areas can be covered by a small number of projectors, and varying urban layouts can be accommodated. The piece will cover an area of up to 2,000 square metres and can spread 14 different portraits simultaneously over that area.

 

The video portraits are stored in 14 custom-made media servers, that can be cued by a wireless link, and that can rotate, keystone correct, scale and scrub each video sequence to compensate for geometric distortions. The projector that casts the shadows is the brightest projector in the world and has a 12kW HMI lamp that can generate 110,000 ANSI lumens of intensity.