Tracking Sequence (image) University of Washington Share Print E-Mail Caption Frames from a moving camera recorded by the Swiss Federal Institute of Technology in Zurich, Switzerland, show how the system distinguishes among people by giving each person a unique color and number, then tracking them as they walk. Credit Swiss Federal Institute of Technology Usage Restrictions Photo credit required. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.