Television – Camera – system and detail – Combined image signal generator and general image signal...
Patent
1997-12-05
2000-05-09
Garber, Wendy
Television
Camera, system and detail
Combined image signal generator and general image signal...
H04N 964
Patent
active
060610921
ABSTRACT:
Elimination of dark fixed pattern noise (DFPN) for tethered CMOS sensor-based digital video cameras is supported by supplying and maintaining a host-based dark image cache. Since the camera is tethered to a host computer system such as a PC, it takes advantage of the storage and processing capabilities of the host to manage the cache. By using a dark image cache for updating of the currently applicable dark image for DFPN cancellation processing, operation of the camera shutter for acquiring dark images is dramatically reduced, thereby using less system resources such as power, and increasing the MTBF of the electromechanical devices such as the camera shutter and associated controls. Dark images are obtained at different integration, gain, and temperature operating characteristics of the camera and stored in the cache. The cached dark images are referenced on the host according to a fixed, predetermined dark column of data in video frames generated by the CMOS sensor image array of the camera. The dark column data represents a portion of the CMOS sensor image array which is permanently and totally shadowed for use during DFPN cancellation processing.
REFERENCES:
patent: 5047863 (1991-09-01), Pape et al.
patent: 5132801 (1992-07-01), Yamano
patent: 5272536 (1993-12-01), Sudo et al.
patent: 5365269 (1994-11-01), Holmes et al.
patent: 5479206 (1995-12-01), Ueno et al.
patent: 5541654 (1996-07-01), Roberts
patent: 5568192 (1996-10-01), Hannah
patent: 5602984 (1997-02-01), Mieras
patent: 5608455 (1997-03-01), Oda
patent: 5612739 (1997-03-01), Maki et al.
patent: 5642162 (1997-06-01), Maki et al.
patent: 5696554 (1997-12-01), Hwang
patent: 5729288 (1998-03-01), Saito
patent: 5734425 (1998-03-01), Takizawa et al.
patent: 5796430 (1998-08-01), Katoh et al.
patent: 5805300 (1998-09-01), Fukushima
patent: 5812703 (1998-09-01), Juen et al.
patent: 5926214 (1999-07-01), Denyer et al.
Hurwitz et al., "An 800K-Pixel Color CMOS Sensor for Consumer Still Cameras," SPIE 17 Nov. 1997; vol. 3019, pp. 115-124.
Aldrich Bradley C.
Bakhle Ashutosh J.
Garber Wendy
Intel Corporation
Moe Aung S.
Skabrat Steven P.
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