Method and apparatus for simulating color print

Details Method and apparatus for simulating color print Method and apparatus for simulating color print

1997-06-27

1999-08-03

Popovici, Dov

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358518, 358525, G06F 1500

Patent

active

059335793

ABSTRACT:
An illuminance spectrum I of reflected light from a color print of an arbitrary dot percent d is defined by a diffuse reflection coefficient Sb(d,.lambda.) and a specular reflection coefficient Ss(d,.lambda.). The diffuse reflection coefficient Sb(d,.lambda.) is determined by linear interpolation of a plurality of reference reflection coefficients Sb(d.sub.i,.lambda.) for a plurality of reference dot percents d.sub.i. The specular reflection coefficient Ss(d,.lambda.) is also determined by linear interpolation of a plurality of reference reflection coefficients Ss(d.sub.j,.lambda.) for a plurality of reference dot percents d.sub.j. The illuminance spectrum of reflected light is then determined according to these reflection coefficients Sb(d,.lambda.) and Ss(d,.lambda.). Color data representing the colors of the print in a calorimetric system suitable for an output device are subsequently generated from the illuminance spectrum.

REFERENCES:
patent: 4905039 (1990-02-01), Terashita
patent: 5272518 (1993-12-01), Vincent
patent: 5408447 (1995-04-01), Cottrell et al.
patent: 5485556 (1996-01-01), Takagi et al.
patent: 5596425 (1997-01-01), Usui et al.
R. Balasubramanian, "Colorimetric Modeling of Binary Color Printers", Proceedings Of The International Conference On Image Processing, Washington, Oct. 23-26, 1995, vol. 2, Institute of Electrical and Electronics Engineers, pp. 327-330.
H. Kang, "Applications of color mixing models to electronic printing", Journal Of Electronic Imaging, vol. 3., No. 3, Jul. 1994, pp. 276-287.

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