Facsimile and static presentation processing – Natural color facsimile – Measuring – testing – and calibrating
Patent
1992-02-10
1994-05-31
Powell, Mark R.
Facsimile and static presentation processing
Natural color facsimile
Measuring, testing, and calibrating
358523, 358535, H04N 146
Patent
active
053174259
ABSTRACT:
Apparatus and associated methods employed therein, for objectively providing an accurate appearance match between images produced by two imaging systems (e.g. a target image produced by one such system, e.g. a press sheet (140) generated by a printing press (130), which is to be matched by a replica image produced by another such system, e.g. a proof (120) generated by a color halftone proofing system(110)) and thereby calibrate the performance of one imaging system, e.g. the proofing system, to that of the other system, e.g. the printing press. Specifically, measurement data, such as illustratively densitometric N,R,G,B measurements, is obtained for the same portions of the press sheet and proof. This data is then transformed into a color space which encodes color information in a pre-defined manner that approximates color preferences inherent in human color interpretation. Thereafter, through use of a pre-determined model of the proofing system, incorporated into pre-defined matching principles which objectively and quantitatively define an accurate appearance match between the images produced by both systems, changes in operational settings for the proofing system, such as solid area densities and tint dot areas, are determined which will calibrate the response of the proofing system to that of the press. Consequently, tone and color rendition produced by the proofing system is modified to provide an accurate appearance match to that obtained, from a common image source, on the press, given the judgmental preferences of a human observer and the performance limitations of the proofing system.
REFERENCES:
patent: 4660159 (1987-04-01), Ott
patent: 4665496 (1987-05-01), Ott
patent: 4706206 (1987-11-01), Benoit et al.
patent: 4708459 (1987-11-01), Cowan et al.
patent: 4901254 (1990-02-01), Dolezalek et al.
patent: 4958220 (1990-09-01), Alessi et al.
patent: 4975862 (1990-12-01), Keller et al.
patent: 5206918 (1993-04-01), Levene
"Gretag SPM50: A True Spectral Grating Spectrophotometer Offering the Operating Ease of a Densitometer", Gretag SPM50 spectrophotometer brochure.
F. Billmeyer, "Quantifying Color Appearance Visually and Instrumentally", Summaries of Papers Presented at the Color Appearance Topical Meeting--Optical Society of America, 29-30 Jun. 1987, Annapolis, Maryland, pp. 4-7.
W. Cowan, "The Computational Approach to Colour Reproduction", Summaries of Papers Presidented at the Color Appearance Topical Meeting --Optical Society of America, 29-30 Jun. 1987, Annapolis, Maryland, pp. 98-101.
J. Thornton et al., "High Resolution `Paint by Number`", Summaries of Papers Presented at the Color Appearance Topical Meeting--Optical Society of America, 29-30 Jun. 1987, Annapolis, Maryland, pp. 104-105.
J. Rosenbau, "Semi-Automatic Generation of Film Compensation Tables", Summaries of Papers Presented at the Color Appearance Topical Meeting--Optical Society of America, 29-30 Jun. 1987, Annapolis, Maryland, pp. 111-114.
S. Guth et al., "Vector model for normal and dichormatic color vision", Journal of the Optical Society of America, vol. 70, No. 2, Feb. 1980, pp. 197-212.
Granger Edward M.
Rinehart Charles E.
Spence John P.
Burks, Jr. Harold
Eastman Kodak Company
Powell Mark R.
Randall Robert L.
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