Least-squares method use-type multi-page coherent analysis for the printer in the banding diagnosis compensation

摘要

PROBLEM TO BE SOLVED: To suitably estimate a banding profile to be generated for an image printing system which at least one marking engine with a mechanism for charging a surface to be used as an image forming destination by a charging device, partially discharging the surface with radiation by an exposing device, and developing a formed latent image with toner by a developer unit.;SOLUTION: Image data is obtained by sensors across multiple measurement intervals (610A); the image data is reinforced based on timing information on a processor to generate a coherent signal (610B); a periodic component which represents a banding profile is detected by being discriminated from aperiodic components of the coherent signal on the processor using least squares estimation (610C), and the periodic component is used to generate an output (610D).;COPYRIGHT: (C)2011,JPO&INPIT