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Proceedings Paper

Clustered-dot halftoning with direct binary search
Author(s): Madhur Gupta; Carl Staelin; Mani Fischer; Omri Shacham; Rodolfo Jodra; Jan Allebach
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Paper Abstract

Printers employing electrophotographic technology typically use clustered-dot screening to avoid potential artifacts caused due to unstable dot rendering. Periodic clustered-dot screens are quite smooth, but also suffer from periodic moire artifacts due to interference with other color channels. Stochastic, clustered-dot screens provide an alternative solution. In this paper, we introduce a new approach for stochastic, clustered-dot halftoning and screen design based on direct binary search. The method deviates from conventional DBS in its use of different filters in different phases of the algorithm. We provide an intuitive explanation for the clustering achieved as a result of this modification, and also discuss ways to control the coarseness of clusters. Due to the non-applicability of conventional screen design procedures to the new halftoning method, we propose a new method for screen design also. Results include images of individually designed constant-tone halftones and halftones of screened folded ramps.

Paper Details

Date Published: 18 January 2010
PDF: 13 pages
Proc. SPIE 7528, Color Imaging XV: Displaying, Processing, Hardcopy, and Applications, 752812 (18 January 2010); doi: 10.1117/12.843971
Show Author Affiliations
Madhur Gupta, Purdue Univ. (United States)
Carl Staelin, Hewlett-Packard Labs. (Israel)
Mani Fischer, Hewlett-Packard Labs. (Israel)
Omri Shacham, Hewlett-Packard Indigo Ltd. (Israel)
Rodolfo Jodra, Hewlett-Packard Co. (United States)
Jan Allebach, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 7528:
Color Imaging XV: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Shoji Tominaga; Alessandro Rizzi, Editor(s)

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