A printing system is provided for color job matching of the output from a plurality of image marking engines. The system includes a first test image printed by a first image marking engine on a media document. The first test image having a data glyph and a plurality of reference patches. The system further...http://www.google.de/patents/US7697166?utm_source=gb-gplus-sharePatent US7697166 - Color job output matching for a printing system
