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MULTIPLE MATRIX REGRESSION METHOD FOR SCANNER COLOR REGRESSION

IP.com Disclosure Number: IPCOM000027759D
Original Publication Date: 1999-Jun-30
Included in the Prior Art Database: 2004-Apr-09

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is the use of a multiple 3x3 matrix regression method that considers a scanner's response to be piecewise linear. Color corrections are required as long as scanners are not colorimetric. By dividing the color input space (RGB) into two regions and using a 3x3 matrix to fit data in each region, the resulting color error is much less than that obtained by using a single 3x3 matrix. This two-matrix method improves data fitting at all luminance levels, especially at higher ones where the human visual system is more sensitive to see a difference.