Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1979-03-26
1980-08-05
Martin, John C.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358294, 358212, H04N 140, H04N 104, H04N 312
Patent
active
042165032
ABSTRACT:
A system for restoring image signal levels and setting signal gain for charge coupled imaging devices (CCDs). Following the last image signal or pixel in a line of image data, a predetermined sequence of dark level signals (D) and light level signals (L) are shifted out of the CCD. The dark level signals are the absence of all image information, while the light level signals represent signals introduced at the appropriate time early in the shifting cycle. At the CCD output, the dark and light level signals are isolated and processed by an MPU in accordance with pre-established functions to provide an offset potential and gain multiplicand. The offset potential and gain multiplicand determined are used to remove the offset and set signal gain for the next succeeding line of image signals. The process is repeated as each line of image signals are output from the CCD.
REFERENCES:
patent: 3800078 (1974-03-01), Cochran et al.
patent: 3800079 (1974-03-01), McNeil et al.
patent: 3962681 (1976-06-01), Requa et al.
patent: 4065788 (1977-12-01), Meier et al.
patent: 4074320 (1978-02-01), Kapes
patent: 4129853 (1978-12-01), Althauser et al.
Martin John C.
Xerox Corporation
LandOfFree
Signal restoration and gain control for image viewing devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal restoration and gain control for image viewing devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal restoration and gain control for image viewing devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2283136