A digital camera accessory is provided for use with a game system having a processing system to execute a video game program and player controls operable by a user to generate video game control signals. The digital camera accessory includes an image sensor for capturing video images, communication circuitry...http://www.google.com.tw/patents/US7972216?utm_source=gb-gplus-share專利 US7972216 - Video game system and camera accessory for a video game system
