Historical Perspectives on 4D Virtualized Reality

Recording dynamic events, such as a sports event, a ballet performance, or a lecture, digitally for experiencing in a spatiotemporally distant setting requires 4D capture: three dimensions for their geometry/ appearance over the fourth dimension of time. Cameras are suitable for this task as they are nonintrusive, universal, and inexpensive. Computer Vision techniques have advanced sufficiently to make the 4D capture possible. In this paper, we present a historical perspective on the Virtualized RealityTM system developed since early 90s to early 2000 at CMU for the 4D capture of dynamic events.