Original sentence: simple edge detection and color tracking, Digimask face mapping), since the announcement of the camera-based PlayStation motion controller and Project Natal control systems at the 2009 Electronic Entertainment Expo, Sony has been promoting a number other technologies available for the PlayStation Eye, such as advanced facial recognition and analysis, and CV-based head tracking
Edited sentence: simple edge detection and color tracking, Digimask face mapping), since the announcement of the camera-based PlayStation motion controller and Project Natal control systems at the 2009 Electronic Entertainment Expo, Sony has been promoting a number of other technologies available for the PlayStation Eye, such as advanced facial recognition and analysis, and CV-based head tracking