Facsimile and static presentation processing – Natural color facsimile – Color correction
Patent
1996-12-30
1999-02-02
Rogers, Scott
Facsimile and static presentation processing
Natural color facsimile
Color correction
348645, 382162, 382167, G03F 308, G06K 900, H04N 968
Patent
active
058672869
ABSTRACT:
In a color processing method and apparatus therefor using two-dimensional (2-D) chromaticity separation for minimizing color difference between an original image and a reproduced image in a color apparatus including a color television receiver, the apparatus includes an index calculator for calculating indexes for projecting R, G and B color signals or luminance signal (Y) and color difference signals (R-Y and B-Y) in a 3-D color space onto a 2-D chromaticity plane, a first look-up table in which the indexes are stored, a second look-up table in which matrix transformation coefficients which define an input-versus-output relationship between the R, G and B color signals or luminance signal (Y) and color difference signals (R-Y and B-Y) are stored and for outputting a predetermined number of transformation coefficients stored in the corresponding address designated by the output signal of the first look-up table, and a color transformation operation unit for receiving the predetermined number of transformation coefficients output from the second look-up table, and performing a matrix operation with respect to the R, G and B color signals or luminance signal (Y) and color difference signals (R-Y and B-Y). The color processing apparatus allows real time processing owing to its simplified structure.
REFERENCES:
patent: 4989080 (1991-01-01), Ito
patent: 5650942 (1997-07-01), Granger
H. Haneishi, K. Miyata, H. Yaguchi and Y. Miyake "A NEW METHOD FOR COLOR CORRECTION IN HARDCOPY FROM CRT IMAGES", Journal of Imaging Science and Technology, vol. 37, No. 1, pp. 30-36, Jan./Feb. 1993.
Kim Chang-yeong
Lee Seong-deok
Grant II Jerome
Rogers Scott
Samsung Electronics Co,. Ltd.
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