Patent ID: 8351081
Filing Date: 2013-01-08
Classification: H04N

Abstract:
1. A method for calibration of a marking device's output color as measured on a printed solid area patch, the method comprising: for each of a desired color separation in an n-separation marking device having at least one actuator per color separation which regulates an amount of colorant deposited on a substrate at the solid area level, said actuator having been set to a nominal operating point: determining a functional relationship between a predicted printed color parameter vector P and a corresponding actuator level using at least two of said measured color parameter vectors, said function relationship comprising a gradient {right arrow over (G)} defined as a function of high and low actuator operation points x using said gradient and said target color parameter vector T to determine a final actuator operating point for said marking device, said final operating point comprising an offset x from said nominal operating point, said offset defining a relationship between said gradient, said target color parameter vector T, and a point C between said color parameter vector L and H which minimizes a distance between said predicted printed color parameter vector and said target color parameter vector; and setting said actuator to said final actuator operating point.