Document Detail


Generating stochastic dispersed and periodic clustered textures using a composite hybrid screen.
MedLine Citation:
PMID:  17153948     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In electrophotographic printing, a periodic clustered-dot halftone pattern is preferred for a smooth and stable result. In addition, the screen frequency should be high enough to minimize the visibility of the halftone textures and to ensure good detail rendition. However, at these frequencies, the halftone cell may contain too few pixels to provide a sufficient number of distinct gray levels. This will result in contouring and posterization. The traditional solution is to grow the clusters asynchronously within a repeating block of clusters known as a supercell. The growth of each individual cluster is governed by a microscreen. The order in which the clusters grow within the supercell is determined by a macroscreen. Typically, the macroscreen is a recursive pattern due to Bayer. In highlights and shadows, this ordering results in visible artifacts. Replacing the Bayer screen by a stochastic macroscreen eliminates these artifacts, but results in new artifacts. In this paper, we propose a new composite screen architecture that employs multiple microscreens and multiple macroscreens in the highlights and shadows. These screens are jointly designed by using the direct binary search (DBS) algorithm.
Authors:
Guo-Yau Lin; Jan P Allebach
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  IEEE transactions on image processing : a publication of the IEEE Signal Processing Society     Volume:  15     ISSN:  1057-7149     ISO Abbreviation:  IEEE Trans Image Process     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-12-12     Completed Date:  2007-01-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9886191     Medline TA:  IEEE Trans Image Process     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3746-58     Citation Subset:  IM    
Affiliation:
Xerox Corporation, Webster, NY 14580, USA. guoyau.lin@xerox.com
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MeSH Terms
Descriptor/Qualifier:
Algorithms*
Cluster Analysis
Colorimetry / methods*
Computer Graphics*
Computer Simulation
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Models, Statistical
Periodicity
Printing / methods*
Reproducibility of Results
Sensitivity and Specificity
Stochastic Processes
User-Computer Interface*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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