On the Phase Response of the Error Diffusion Filter for Image Halftoning

Kumar, Akhil and Makur, Anamitra (1999) On the Phase Response of the Error Diffusion Filter for Image Halftoning. In: IEEE Transactions on Image Processing, 8 (9). pp. 1282-1292.

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Abstract

Conventional error diffusion half toning uses a causal error filter. We propose the iterative error diffusion algorithm by extending the error diffusion to accommodate noncausal error filters. We realize the importance of the phase response of the error filter in the error diffusion halftoning method, and demonstrate it using examples. Iterative error diffusion is able to realize a zero phase error filter. We also trace a drawback of error diffusion to the shape of the error filter, and provide a remedy. The results obtained using zero phase error filter in the iterative error diffusion algorithm are, in our opinion, superior to the error diffusion halftones.

Item Type:	Journal Article
Publication:	IEEE Transactions on Image Processing
Publisher:	IEEE
Additional Information:	©1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Error diffusion;Image halftoning
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	25 Aug 2008
Last Modified:	19 Sep 2010 04:15
URI:	http://eprints.iisc.ac.in/id/eprint/1607

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