Television – Image signal processing circuitry specific to television – Color balance or temperature
Patent
1997-01-30
1999-07-06
Peng, John K.
Television
Image signal processing circuitry specific to television
Color balance or temperature
348661, 348577, 348645, 382162, 382167, 358518, 358520, 345153, 345154, H04N 146
Patent
active
059203587
ABSTRACT:
Physiological primary colors, which correspond to tristimulus values of each of picture elements of an image on a hard copy, are obtained. A parameter, which represents the degree of incomplete chromatic adaptation, is determined in accordance with a correlated color temperature of a white point of a CRT display device, on which the image is to be displayed. Temporary tristimulus values, which are to be reproduced on the CRT display device, are derived in accordance with the parameter. From the temporary tristimulus values, perception values relating to lightness, color vividness and hue, such as metric lightness, metric chroma, and a metric hue angle in the LAB-color space are calculated by taking the white point of the CRT display device as a viewing illuminance. The tristimulus values of the image are then transformed into the tristimulus values on the display device, and a soft copy image is formed on the display device in accordance with the transformed tristimulus values. The same color appearances as those of the hard copy image are thereby obtained on the soft copy image displayed on the display device.
REFERENCES:
patent: 4649423 (1987-03-01), Hoffrichter et al.
patent: 4670780 (1987-06-01), Mcmanus et al.
patent: 4694286 (1987-09-01), Bergstedt
patent: 4709230 (1987-11-01), Popowski et al.
patent: 4839721 (1989-06-01), Abdulwahab et al.
patent: 4992862 (1991-02-01), Gabor
patent: 5233684 (1993-08-01), Ulichney
patent: 5416890 (1995-05-01), Beretta
patent: 5420704 (1995-05-01), Winkelman
patent: 5440352 (1995-08-01), Deter et al.
patent: 5450216 (1995-09-01), Kasson
patent: 5619280 (1997-04-01), Yamashita et al.
patent: 5631749 (1997-05-01), Ueda
patent: 5636290 (1997-06-01), Kita et al.
patent: 5666436 (1997-09-01), Eames
patent: 5668890 (1997-09-01), Winkelman
patent: 5691779 (1997-11-01), Yamashita et al.
patent: 5696839 (1997-12-01), Siegeritz
patent: 5734800 (1998-03-01), Herbert et al.
patent: 5751845 (1998-05-01), Dorff et al.
patent: 5754682 (1998-05-01), Katoh
patent: 5767992 (1998-06-01), Tanaka et al.
patent: 5798753 (1998-08-01), Zhou et al.
patent: 5801855 (1998-09-01), Ohta
Desir Jean W.
Fuji Photo Film Co. , Ltd.
Peng John K.
LandOfFree
Method of transforming colors of image does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of transforming colors of image, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of transforming colors of image will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-903116