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Proceedings Paper

Hybrid halftoning using direct multi-bit search (DMS) screen algorithm
Author(s): Kartheek Chandu; Mikel Stanich; Chai Wah Wu; Barry Trager
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Paper Abstract

In this paper we propose a mathematical framework for multi-bit aperiodic clustered dot halftoning based on the Direct Multi-bit Search (DMS) algorithm. A pixel validation map is provided to the DMS algorithm to guide the formation of homogeneous clusters. The DMS algorithm operates without any user defined guidance, iteratively choosing the best drop absorptance level. An array of valid pixels is computed after each iteration that restricts the selection of pixels available to the DMS algorithm, improving the dot clustering. This process is repeated throughout the entire range of gray levels to create a visually pleasing multi-bit halftone screen. The resultant mask exhibits smoother appearance and improved detail rendering, compared to conventional clustered dot halftoning. Much of the improvements originate from the improved sampling of the aperiodic hybrid screen designs.

Paper Details

Date Published: 3 February 2014
PDF: 9 pages
Proc. SPIE 9015, Color Imaging XIX: Displaying, Processing, Hardcopy, and Applications, 90150P (3 February 2014); doi: 10.1117/12.2036607
Show Author Affiliations
Kartheek Chandu, Ricoh Production Print Solutions, LLC (United States)
Mikel Stanich, Ricoh Production Print Solutions, LLC (United States)
Chai Wah Wu, IBM Thomas J. Watson Research Ctr. (United States)
Barry Trager, IBM Thomas J. Watson Research Ctr. (United States)


Published in SPIE Proceedings Vol. 9015:
Color Imaging XIX: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Alessandro Rizzi, Editor(s)

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