Television – Camera – system and detail – Low light level
Reexamination Certificate
2006-11-14
2006-11-14
Vu, Ngoc Yen (Department: 2622)
Television
Camera, system and detail
Low light level
C348S229100, C348S255000
Reexamination Certificate
active
07136095
ABSTRACT:
For a digital imaging device having automatic gain control, a system and method have been provided for noise compensation in low-light conditions. The method comprises: receiving digital image information; compressing the image information; supplying the compressed image information; monitoring an automatic gain control signal; comparing the monitored gain control signal to a predetermined threshold gain value; in response to monitoring a high gain control signal, selecting a low-light processing algorithm; and, in response to the low-light algorithm, controlling the volume of the supplied compressed image information. Selecting a low-light processing algorithm includes selecting an algorithm that limits decreases in the compression ratio by changing parameters in a compression algorithm. Alternately, the low-light processing algorithm, prior to compressing, filters noise from the received digital image information. Subsequent to filtering noise from the received digital information, an approximately constant compression ratio is maintained.
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Written translation of JP2001-313906A.
Law Office of Gerald Maliszewski
Madden Gregory
Maliszewski Gerald
Sharp Laboratories of America Inc.
Vu Ngoc Yen
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