When you think of “time-lapse video,” what usually springs to mind is a camera fixed on a tripod taking image after image at predetermined intervals. But what if you could do the same thing by taking out your phone and snapping a picture every time you walk past a certain tree on your way to work? No tripod necessary. A Cornell Ann S. Bowers College of Computing and Information Science research group has developed software that could let anyone with a camera-equipped mobile phone capture subtle