1
David J Woodham Jr, William C Woodbury, Daniel Dresdner: System and method for producing video effects on live-action video. Pinnacle Systems, Thomas Schneck, George B F Yee, May 30, 2000: US06069668 (81 worldwide citation)

A digital video effects system for producing live-action video effects in real time includes an address generator having a pair of 2-D tables for providing x-coordinate and y-coordinate offset values. A third 2-D table contains warp activation factors (activators) which are scaled by a clip and gain ...


2
Daniel Dresdner: Television perspective effects system. Digital Services Corporation, Charles A Bevelacqua, May 19, 1987: US04667236 (49 worldwide citation)

This invention employs an incremental technique for performing a perspective transformation on a planar television image. The equipment modifies the coefficients to a two by two matrix multiplier at the pixel or line rate. This allows for perspective generation along either the X or Y axis of the te ...