Patent ID: 8896892
Filing Date: 2014-11-25
Classification: H04N

Abstract:
1. A color reproduction system with drift correction, comprising: an output device, using a set of tone reproduction compensation curves, rendering a test target having a plurality of color test patches on a recording media, said output device having reference device independent color space values associated therewith; a scanner for scanning said rendered test target having said plurality of color test patches to generate scanned RGB image data representative of said plurality of color test patches, the scanned RGB image data providing a color representation of said plurality of color test patches, the scanned RGB image data having a red color component, a green color component, and a blue color component; and an image processing system receiving said scanned RGB image data; said image processing system including a scanner profile associated with a reference recording media, the reference recording media being the recording media used in generating said scanner profile; said scanner profile including a reference red scanner device dependent color space value, R said scanner profile including a reference green scanner device dependent color space value, G said scanner profile including a reference blue scanner device dependent color space value, B said image processing system correcting each color component of said received scanned RGB image data; said received red color component of the received scanned RGB image data being corrected using R′=R*(R said received green color component of the received scanned RGB image data being corrected using G′=G*(G said received blue color component of the received scanned RGB image data being corrected using B′=B*(B said image processing system converting the corrected scanned RGB image data to device independent color space values based upon a said scanner profile associated with the reference recording media; said image processing system comparing the generated device independent color space values with said reference device independent color space values associated with said output device; said image processing system modifying the set of tone reproduction compensation curves based upon the comparison of the generated device independent color space values with said reference device independent color space values associated with said output device.