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Proceedings Paper

Stochastic clustered-dot screen design for improved smoothness
Author(s): Madhur Gupta; Puneet Goyal; Mani Fischer; Carl Staelin; Tamar Kashti; Omri Shacham; Jan Allebach
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Paper Abstract

Printers employing electrophotographic technology typically use clustered-dot screening to avoid potential artifacts caused by unstable dot rendering. Periodic clustered-dot screens are quite smooth, but also suffer from periodic moir´e 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 screen design based on Direct Binary Search (DBS). The method differs from the conventional DBS in its use of a modified cost metric which was derived in an earlier work from using different filters in the initialization and update phases of DBS. The objective of the chosen approach is to design screen for improved print smoothness by generating a homogeneous distribution of compact, uniformly-sized clusters. The results include halftone of a screened folded-ramp, compared against a screen designed with a previous method.

Paper Details

Date Published: 25 January 2011
PDF: 9 pages
Proc. SPIE 7866, Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications, 78661B (25 January 2011); doi: 10.1117/12.878599
Show Author Affiliations
Madhur Gupta, Purdue Univ. (United States)
Puneet Goyal, Purdue Univ. (United States)
Mani Fischer, Hewlett-Packard Labs. Israel Ltd. (Israel)
Carl Staelin, Hewlett-Packard Labs. Israel Ltd. (Israel)
Tamar Kashti, Hewlett-Packard Labs. Israel Ltd. (Israel)
Omri Shacham, Hewlett-Packard Indigo Ltd. (Israel)
Jan Allebach, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 7866:
Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Alessandro Rizzi, Editor(s)

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