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Model-Based Thermal History Control

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Heat diffusion within a thermal printhead leads to interactions between printed image pixels over both long and short distances, and results in a sharpness degradation and a distortion of the tone-scale. The loss in image quality is severe, especially if the thermal printhead is efficient and is printing at high speed. We present a novel multi-resolution thermal history control algorithm that delivers a requested print density via a physical model of heat propagation and an empirical model of the media response. The algorithm comprises three recursions, two in scale and one in time. This multi-scale recursive formulation leads to a computationally efficient real-time implementation. Experimental results demonstrate: 1) significantly improved SQF, 2) accurate dynamic and steady-state tone-scale reproduction and 3) equalization of leading, trailing and lateral edge sharpness.

Document Type: Research Article

Publication date: 2002-01-01

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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