Digital gamma correction circuit and digital gamma...

Details Digital gamma correction circuit and digital gamma... Digital gamma correction circuit and digital gamma...

2011-04-05

2011-04-05

Hsia, Sherrie (Department: 2422)

Television

Image signal processing circuitry specific to television

Gray scale transformation

Reexamination Certificate

active

07920212

ABSTRACT:
A digital gamma correction circuit includes: a data setting portion for setting set data including a section width W1and coordinates (Xp,Yp) of a break point P; a coefficient calculation portion for calculating coefficients for straight-line equations representing a broken baseline including a break point and three predetermined approximate line segments for defining a gamma correction broken line approximating an ideal gamma correction curve, the approximate line segments gradually varying in slope in the vicinity of the break point; arithmetic portions for performing arithmetic operations based on the coefficients to subject input data to gamma correction; and a result selection portion for making a suitable selection from among results for the arithmetic operations. Thus, it is possible to obtain a gamma correction broken line approximating an ideal gamma correction curve, and achieve a smooth correction characteristic with a small number of data items.

REFERENCES:
patent: 5243426 (1993-09-01), Murayama et al.
patent: 6278496 (2001-08-01), Kitagawa et al.
patent: 7477303 (2009-01-01), Tanji et al.
patent: 8-51557 (1996-02-01), None
patent: 10-75384 (1998-03-01), None
patent: 11-32237 (1999-02-01), None
patent: 11-120344 (1999-04-01), None

Affiliated with

Also associated with

Rating

Digital gamma correction circuit and digital 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 Digital gamma correction circuit and digital gamma..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital gamma correction circuit and digital gamma... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2626232