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Quasi-continuous Dot Position Error Diffusion

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Halftoning, which is a technology of printing continuoustone images imitatively on bi-level printing devices such as ink jet printers and electrophotographic printers, has been studied extensively, and many techniques such as error diffusion have been proposed. The premise of them is that the size and pitch of each dot is equal. In the case of ink-jet printers however, the dot position can be controlled with a smaller unit than dot size by electrostatic deflection, etc, though the dot size is fixed because it is determined by the size of a drop of ink. Yanaka et al. have already proposed an algorithm in which the position of each black dot is completely continuous, and each black dot is regarded to be a charged particle. In this paper another solution has been proposed, in which the position of each black dot is digital, but can be controlled with a smaller unit than the dot size. The algorithm is an extension of conventional error diffusion. In order to get better halftone images, scalable error filter has been proposed, in which error filter of arbitrary size can be generated simply by giving a parameter.

Document Type: Research Article

Publication date: 2002-01-01

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  • 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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