A method and apparatus for transforming wide angle video into perspective corrected viewing zones which either a single user or multiple users may select, orient and magnify. The present invention first captures a wide angle digital video input by any suitable means. The captured image is then stored...http://www.google.com.hk/patents/US20020063802?utm_source=gb-gplus-share專利 US20020063802 - Wide-angle dewarping method and apparatus
