The Replate

Abstract

Replates are a new way to experience replays of sporting events. We use computer vision tools, such as camera tracking and background subtraction, to align all frames in the original video with regard to each other. Using this alignment, we create a single plate as it would be seen from a wide-angle static camera. Key players and events are then reinserted into this arena using an interactive tool, recovering the big picture that is typically lost due to camera panning and zoom. Replates are played in continuous loop. We allow replate authors to include multiple instances of each player, offset by regular intervals, so viewers can quickly and repeatedly inspect their favorite moments. Authors can also choose from a variety of effects that help them construct a narrative of their favourite plays. The interactive system gives immediate feedback allowing authors to adjust the rendered replates interactively. Replates take a fraction of the size of the original input video, and produce an effect reminiscent of video game reenactments of famous sporting events. The footage, however, is real.