Patent ID: 7630672
Filing Date: 2009-12-08
Classification: G03G

Abstract:
1. A method performed by a processor executing an operative set of processor executable instructions for rectifying color separation registration error in a multi-color printing system, the method comprising: instructing by the processor first and second color separation devices marking first and second color separations, respectively, to mark a substrate with a first fine-periodic-patch image based on a first period; instructing by the processor the first and second color separation devices to mark the substrate with a second fine-periodic-patch image based on the first period; comparing by the processor densities of the marked first and second fine-periodic-patch images; and adjusting the color printing system by the processor for at least partially rectifying the color separation registration error by shifting marking of the second color separation relative to marking of the first color separation, wherein a direction of the shifting is based on a result of the comparing.