White-level correction circuit

Details White-level correction circuit White-level correction circuit

1995-06-07

1998-01-20

Stoll, Thomas L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358446, 358465, 358406, 382271, 382274, H04N 140

Patent

active

057106401

ABSTRACT:
A white-level correction circuit for an analog-to-digital converter which converts an analog image signal of a pixel, which is input from an external source, to digital image data based on white-level reference voltage and black-level reference voltage inputs. The white-level correction circuit stores white-level reference data for the pixel in a memory and reads the data from the memory in synchronization with the input of the analog image signal. A digital-to-analog converter converts the read white-level reference data to an analog signal comprising the white-level reference voltage. The digital image data is decoded and white-level reference voltage correction data is generated by correcting the read white-level reference data, based on the decoded digital image data, and the white-level correction data is stored in the memory.

REFERENCES:
patent: 5191445 (1993-03-01), Kurokawa et al.
patent: 5237431 (1993-08-01), Imoto
patent: 5317421 (1994-05-01), Ito
patent: 5402249 (1995-03-01), Koseki et al.

Affiliated with

Also associated with

Rating

White-level correction circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with White-level correction circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and White-level correction circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-729579