Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2006-12-26
2006-12-26
Kostak, Victor R. (Department: 2622)
Television
Image signal processing circuitry specific to television
Gray scale transformation
C348S675000
Reexamination Certificate
active
07154562
ABSTRACT:
A method of gamma correction includes selecting lower and upper reference curves corresponding to selected reference gamma values. A gamma correction curve is generated from a corresponding gamma correction value and cross-correlated with the upper and lower reference curves to generate a corresponding set of cross-correlation factors. The set of cross-correlation factors are stored and indexed to the corresponding gamma value. An input value is received for gamma correction with the corresponding gamma value. Data from the upper and lower reference curves indexed by the input value are then operated one with the cross-correlation factors to generate a gamma corrected output value.
REFERENCES:
patent: 4503464 (1985-03-01), Dielhof
patent: 5175621 (1992-12-01), Maesato
patent: 5243426 (1993-09-01), Murayama
patent: 5282036 (1994-01-01), Worley et al.
patent: 5408267 (1995-04-01), Main
patent: 5706058 (1998-01-01), Okada
patent: 6166781 (2000-12-01), Kwak et al.
patent: 6266103 (2001-07-01), Barton et al.
patent: 6340996 (2002-01-01), Nakamura
patent: 6633343 (2003-10-01), Ito et al.
patent: 6697127 (2004-02-01), Suzuki
patent: 6727959 (2004-04-01), Eskin
Chowdhury Ahsan
Melanson John
Venkitachalam Anand
Cirrus Logic Inc.
Kostak Victor R.
Murphy James J.
Thompson & Knight LLP
LandOfFree
Methods and circuits for implementing programmable gamma... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and circuits for implementing programmable gamma..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and circuits for implementing programmable gamma... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3714842