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Direct Color Consistency Control for Xerographic Printing

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The digital color printing process can be described by the color reproduction characteristics (CRC) function that maps the input color to the output color. The CRC map is high dimensional in that there are potentially high number of output colors that a digital color printing process can reproduced. To maintain color consistency, it is desirable to have the CRC to match the desired CRC map at all times. In this paper, we first propose an effective sparse sensing approach known as time-sequential sampling to retrieve the time-varying CRC using small number of color samples at each print cycle. The availability of this information enables formulation of a 2-STAGE process level control system: STAGE-I is a curve fitting robust control that makes best use of the xerographic actuators and STAGE-II is a image feedforward compensation scheme. The key contribution of this paper is in proposing direct CRC control (full closed loop) for maintaining color consistency, as opposed to stabilizing the TRC of all the primary color separations (i.e. Cyan, Magenta, Yellow and Black) in previous works. Effective CRC stabilization is demonstrated using the proposed approach while requiring small number of color samples.

Document Type: Research Article

Publication date: January 1, 2009

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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