Image color registration sensor calibration

专利名称：Image color registration sensor calibration发明人：Olga Y. Ramirez,Mark A. Omelchenko申请号：US09447231申请日：19991123公开号：US06603574B1公开日：20030805

专利附图：

摘要：Color imaging methods and systems are provided where each color separationimage is to be registered in a composite manner under a variety of machine conditions.Registration sensors are provided to register the color separations under a variety ofmachine conditions while accounting for the different types of registration sensors used.

A controller calibrates the registration sensors automatically based on set-up data and,using the calibrated sensors, controls the output of the image data for one or more ofthe color separation images to reduce or eliminate image registration offsets. Theregistration sensors are calibrated by directly measuring set-up marks during set-up.Each registration sensor outputs a feedback to the controller during set-up to accountfor phenomenon caused by variation in toner concentration or sensor susceptibility. Theregistration sensors provide a plurality of set-up sensor feedback values, one for each ofat least four colors and one for a bare photoreceptor belt. The controller determinesthe differences between the set-up sensor feedback value for each of the four colors andthe set-up feedback value for the bare photoreceptor belt and uses the determineddifferences to adjust the operating conditions for each sensor, including the amount ofdriving current applied to the sensor.

申请人：XEROX CORPORATION

代理机构：Oliff & Berridge, PLC

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