An image signal provided by an image pickup device, such as a CCD, is converted into a video signal by a signal processor. An extraction means extracts a candidate object region from the current video signal and an object region determined a certain time before by a decision means is read from a memory....http://www.google.fr/patents/US5631697?utm_source=gb-gplus-shareBrevet US5631697 - Video camera capable of automatic target tracking
