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Volume: 7 | Article ID: art00014
Target-less Scanner Color Calibration
  DOI :  10.2352/CIC.1999.7.1.art00014  Published OnlineJanuary 1999

The lack of a scanner calibration target representative of the image medium (substrate and colorants) often limits the accuracy of scanner color calibration. In this paper, a color calibration method is presented for photographic input media that does not require a calibration target. Using characteristic spectral measurements from the image(s) to be scanned, a model for the spectra on the medium is obtained through a principal component analysis. The spectral sensitivity of the scanner provides a model for its operation. By using a set-theoretic estimation method that combines the models for the scanner and the medium, the spectral reflectance of the input corresponding to a given set of scanner RGB values can be determined. This provides a spectral calibration for the scanner, which can readily be transformed into a color calibration under any suitable viewing illuminant. Results from simulations and actual calibrations demonstrate the value of the new method.

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Gaurav Sharma, "Target-less Scanner Color Calibrationin Proc. IS&T 7th Color and Imaging Conf.,  1999,  pp 69 - 74,

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