Computer graphics processing and selective visual display system – Display peripheral interface input device
Patent
1996-12-11
1998-06-30
Brier, Jeffery
Computer graphics processing and selective visual display system
Display peripheral interface input device
345147, G09G 504
Patent
active
057741123
ABSTRACT:
Midtone correction of RGB pixel values is provided, without changes in chromaticity, by multiplying each color component of a linear RGB representation by a single value. The single value corresponds to an adjustment of the original luminance of the pixel, resulting in no change to the chromaticity of the pixel.
REFERENCES:
patent: 2634324 (1953-04-01), Bedford
patent: 4464667 (1984-08-01), Kuhn et al.
patent: 4752821 (1988-06-01), Poetsch
patent: 4758885 (1988-07-01), Saski et al.
patent: 4876591 (1989-10-01), Muramatsu
patent: 4931864 (1990-06-01), Kawamura et al.
patent: 4951129 (1990-08-01), Lang et al.
patent: 4970584 (1990-11-01), Sato et al.
patent: 5012333 (1991-04-01), Lee et al.
patent: 5032901 (1991-07-01), Vlahos et al.
patent: 5130935 (1992-07-01), Takiguchi et al.
patent: 5146346 (1992-09-01), Knoll et al.
patent: 5170152 (1992-12-01), Taylor et al.
patent: 5237402 (1993-08-01), Deshon et al.
patent: 5278678 (1994-01-01), Harrington et al.
patent: 5283670 (1994-02-01), Capitant et al.
patent: 5303071 (1994-04-01), Kakimura et al.
patent: 5307159 (1994-04-01), Hieda et al.
patent: 5315416 (1994-05-01), Taniuchi et al.
patent: 5329362 (1994-07-01), Takaiwa et al.
Hunt, R.W.G., "The Reproduction of Colour In Photography, Printing & Television", pp. 595-597, Fountain press, Tolworth, England, 1987.
Omri Govrin, Sharpening of Scanned Originals Using the Luminance, Hue and Saturation (LHS) Coordinate System, SPIE vol. 2171, (Feb. 1994), pp. 332-338.
Gunter Wyszecki & W.S. Stiles, Color Science, Concepts and Methods, Quantitative Data and Formulae, John Wiley & Sons (1982) p. 487.
John C. Russ, The Image Processing Handbook, CRC Press (1992), pp. 1-6.
Brier Jeffery
International Business Machines - Corporation
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