Society’s need for greater surveillance at home and work is increasing, but without compromising the right to privacy. Computer scientist Samson Cheung of the University of Kentucky creates programs that can manipulate video surveillance all the way down to the pixel level. For example, an individual in a video can be erased, with that image then embedded into a secure watermark. If the complete video is needed for legal purposes, the stream can be recreated. From the Series:Center for Visualization