Title :
Automatic viewing range tracing method for communication equipment
Author :
Yamamoto, Kazuyuki ; Tsukada, Hideo ; Mizukoshi, Hidemi
Author_Institution :
NTT Corp., Kanagawa, Japan
fDate :
8/1/1991 12:00:00 AM
Abstract :
A low-cost image processing feature for the video telephone and television doorphone intercom has been developed. By solving the practical problems involved and modifying the AVRT (automatic viewing range tracing method) algorithm, the error ratio of the AVRT was reduced several percentage points, which clears the way for its practical use. The AVRT feature can also be used as a security sensor in home automation systems
Keywords :
distance measurement; picture processing; teleconferencing; videotelephony; AVRT algorithm; automatic viewing range tracing; communication equipment; error ratio; home automation systems; image processing; security sensor; television doorphone intercom; video telephone; Cameras; Charge-coupled image sensors; Communication equipment; Humans; Infrared image sensors; Large scale integration; Signal processing; Signal processing algorithms; Telephony; Videoconference;
Journal_Title :
Consumer Electronics, IEEE Transactions on
