Image analysis – Color image processing
Patent
1997-08-01
1999-11-09
Au, Amelia
Image analysis
Color image processing
395109, G06K 900
Patent
active
059829249
ABSTRACT:
A full color process image that can be printed with cyan, magenta, yellow, and black inks is produced as a duotone image using only two colors of ink. Color data defining the colors used in the full color image serve as input to a process that maps the colors into a duotone gamut defined by the two colors of ink that will be used to produce the duotone image. A user is able to select 0, 1, or 2 colors of ink for the duotone image, and the software program automatically chooses the remaining ink or inks so as to reproduce the image as accurately as possible; the software also produces the appropriate color separations automatically. In addition, the paper color can be specified by the user or optimally determined by the optimizing process of the software to optimize the duotone image reproducing a full color image that has little white. The paper color provides a free third color. A black separation can also optionally be included when printing the duotone image to expand the range of luminance available. When black ink is used, some amount of black is subtracted from the each color of the original image before the optimization and mapping process is applied, and the black separation is determined to add back the appropriate amount of black when printing the duotone image. The duotone images produced by the method are relatively high-quality, economical alternatives to full-color printing.
REFERENCES:
patent: 5047842 (1991-09-01), Bouman, Jr. et al.
patent: 5185661 (1993-02-01), Ng
patent: 5237517 (1993-08-01), Harrington et al.
patent: 5611030 (1997-03-01), Stokes
patent: 5644509 (1997-07-01), Schwartz
patent: 5740333 (1998-04-01), Yoh et al.
F.R. Clapper and J.A.C. Yule. The effect of multiple internal reflections on the densities of half-tone prints on paper. Journal of the Optical Society of America, 43(7):600-603, Jul. 1953.
Ronald S. Gentile and Jan P. Allebach. A comparison of techniques for color gamut mismatch compensation. In Human Vision, Visual Processing, and Digital Display, vol. 1077 of Proceedings of the SPIE, pp. 342-354. SPIE, Bellingham, WA, 1989.
Andrew S. Glassner, Kenneth P. Fishkin, David H. Marimont, and Maureen C. Stone. Device-directed rendering. ACM Transactions on Graphics, 14(1):58-76, Jan. 1995.
Arthur C. Hardy and F.L. Wurzburg, Jr. Color correction in color printing. Journal of the Optical Society of America, 38(4):300-307, Apr. 1948.
Kansei Iwata and Gabriel Marcu. Computer simulation of printed colors on textile materials. In Color Hard Copy and Graphic Arts III, vol. 2171 of Proceedings of the SPIE, pp. 228-238. SPIE, Bellingham, WA 1994.
Henry R. Kang. Applications of color mixing models to electronic printing. Journal of Electronic Imaging, 3(3:276-287, Jul. 1994.
Bruce J. Lindbloom. Accurate color reproduction for computer graphics applications. In Proceedings of SIGGRAPH '89, pp. 117-126. ACM, New York, 1989.
Gabriel Marcu and Satoshi Abe. Color designing and simulation in non-conventional printing process. In Applications of Digital Image Processing XVII, vol. 2298 of Proceedings of the SPIE, pp. 216-223. SPIE, Bellingham, WA, 1994.
H.E.J. Neugebauer. Die Theoretischen Grundlgen des Mehrfarbenedruckes (The theoretical foundation for multicolor printing). Z. Wiss Photogr., pp. 73-89, 1937. Reprinted in Sayanai [20], pp. 194-202.
Victor Ostromoukhov. Chromaticity gamut enhancement by hepatone multi-color printing. In Device-Independent Color Imaging and Imaging Systems Integration, vol. 1909 of Proceedings of the SPIE, pp. 139-151. SPIE, Bellingham, WA, 1989.
Victor Ostromoukhov and Roger D. Hersch. Artistic screening. In Proceedings of SIGGRAPH 95, pp. 219-228. ACM, New York, 1995.
Warren Rhodes. Fifty years of the Neugebauer equations. In Sayanai [20], pp. 7-18.
Maureen C. Stone, William B. Cowan, and John C. Beatty. Color gamut mapping and the printing of digital color images. ACM Transactions on Graphics, 7(4):249-292, Oct. 1988.
Johannes von Kries. Chromatic adaptation. In David L. MacAdam, editor, Sources of Color Science, pp. 109-119, MIT Press, Cambridge, MA, 1970.
Power Joanna L.
Salesin David H.
Stollnitz Eric J.
West Brad S.
Anderson Ronald M.
Au Amelia
Cooperrider F. E.
University of Washington
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