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Six Color Scanning

Hunter, Andrew; DiCarlo, Jeffrey; Pollard, Stephen
HP Laboratories

HPL-2008-68

Keyword(s): scanner, 6-color, color-accuracy, illumination, CCFL, phosphors, CCD, regression, color correction

Abstract: Scanner color accuracy is of growing importance as more and more people want to scan color photographs. Traditional three color scanners can suffer from color reproduction errors due to the significant mismatch between their spectral sensitivities and those of the human visual system. In this paper the authors describe some of the technology behind a novel six color scanner that combines data captured with two different light sources to produce an improved final scan. Specifically, they describe the selection of appropriate light sources and the tuning of the scan parameters for those lights. They also describe a color processing pipeline that avoids amplification of image noise, and data processing methods to overcome illumination problems with non-flat subjects and slightly misaligned scans.

5 Pages

Additional Publication Information: To be published at CGIV 2008, the 4th European Conference on Colour in Graphics, Imaging, and Vision, June 12, 2008, Terrassa Spain.

External Posting Date: June 21, 2008 [Abstract Only]. Approved for External Publication
Internal Posting Date: June 21, 2008 [Fulltext]

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