Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2003-04-16
2008-03-25
Tung, Kee M. (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S468000, C345S469000, C345S469100, C345S470000, C345S472200, C345S611000, C345S612000, C382S260000, C382S263000, C382S264000, C382S269000, C382S274000, C382S275000, C382S298000, C382S299000, C382S301000
Reexamination Certificate
active
07348991
ABSTRACT:
A text enhancement unit is introduced in order to alleviate the degradation of text characters on computer or television displays. The text enhancement unit uses an enhancement process to regain uniformity and intensity that may be lost during image processing. The text enhancer unit may be placed between an image processing unit such as a scaler, de-interlacer, or DSP, and a computer or television display to improve the quality of text characters that may have become degraded by image processing performed by the image processing unit. In one embodiment, the text enhancer unit improves contrast by multiplying pixel intensity by an intensity multiplier. In a second embodiment, the text enhancer unit improves contrast using a threshold operation which outputs either a very high or very low intensity pixel. In an third embodiment, the text enhancer unit improves contrast using a threshold operation which outputs either a very low intensity pixel or a pixel multiplied by an intensity multiplier. In a fourth embodiment, the text enhancer unit improves contrast using a threshold operation which outputs either an unchanged pixel or a pixel multiplied by an intensity multiplier. In a fifth embodiment, the text enhancer unit improves contrast using a dual threshold operation which outputs either a very low intensity pixel, a very high intensity pixel, or an unchanged pixel.
REFERENCES:
patent: 4755954 (1988-07-01), Netter
patent: 5285271 (1994-02-01), Gennetten
patent: 5712799 (1998-01-01), Farmwald et al.
patent: 5907665 (1999-05-01), Sobol et al.
patent: 6208763 (2001-03-01), Avinash
patent: 6227725 (2001-05-01), Ancin et al.
patent: 6240217 (2001-05-01), Ercan et al.
patent: 6282327 (2001-08-01), Betrisey et al.
patent: 6339426 (2002-01-01), Lui et al.
patent: 6384828 (2002-05-01), Arbeiter et al.
patent: 6535648 (2003-03-01), Acharya
patent: 6603482 (2003-08-01), Tidwell
patent: 7173660 (2007-02-01), Toji et al.
patent: 2002/0154810 (2002-10-01), Hakim et al.
Keating Stephen J.
Siemens Duane P.
Blakely & Sokoloff, Taylor & Zafman
Caschera Antonio A
Silicon Image Inc.
Tung Kee M.
LandOfFree
Video/graphics text mode enhancement method for digitally... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video/graphics text mode enhancement method for digitally..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video/graphics text mode enhancement method for digitally... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3963030