Optics: measuring and testing – Standard – Surface standard
Patent
1998-11-12
2000-07-11
Font, Frank G.
Optics: measuring and testing
Standard
Surface standard
356402, 3562431, 358500, 358504, 358515, 358518, G01J 102, H04N 146
Patent
active
060880953
ABSTRACT:
A target-less calibration system for calibrating a scanner for a particular input medium without using a dedicated calibration target on that medium is disclosed. The system employs the (predetermined) spectral response of the scanner and representative spectral measurements of the input medium to achieve the calibration. The representative spectral measurements of the input medium are used to infer the set of feasible spectra for the medium. Corresponding to a given scanner signal output, another set representing the candidate spectra that could have resulted in the given scanner output are determined using the predetermined scanner spectral response. Combining the two requirements, a spectrum in the intersection of the thus determined sets of scanner candidate spectra and prenoted feasible media spectra provides an estimated spectrum of the input sample. Repeating the process over the range of scanner outputs provides a complete spectral calibration for the scanner for the given medium. Each spectrum is convertible to a device-independent color space for any given viewing illuminant, providing a calibration from the scanner output to device independent color space.
REFERENCES:
patent: 5148288 (1992-09-01), Hannah
patent: 5157506 (1992-10-01), Hannah
patent: 5272518 (1993-12-01), Vincent
patent: 5463480 (1995-10-01), MacDonald et al.
patent: 5809213 (1998-09-01), Bhattacharjya
patent: 5835244 (1998-11-01), Bestmann
patent: 5956469 (1999-09-01), Liu et al.
patent: 6005968 (1999-12-01), Granger
Combettes, Patrick L., Generalized Convex Set Theoretic Image Recovery, Dept. of Electrical Engineering--City College and Graduate School; City University of New York, New York, NY 10031.
Sharma, Gaurav, Trussell, H. Joel, Set Theoretic Estimation in Color Scanner Characterization, Journal of Electronic Imaging/Oct. 1996/Vo. 5(4)/479.
Viggiano, J.A. Stephen, Wang, C. Jeffrey, A Novel Method for Colorimetric Calibration of Color Digitizing Scanners, RIT Research Corporation, Imaging Division.
Berns, Roy S., Shyu, M.J., Colorimetric Characterization of a Desktop Drum Scanner Using a Spectral Model, Journal of Electronic Imaging 4(4), 360-372 (Oct. 1995).
Font Frank G.
Punnoose Roy M.
Xerox Corporation
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