Journal of Zhejiang University SCIENCE C

, Volume 14, Issue 12, pp 918–929 | Cite as

An improved parallel contrast-aware halftoning

  • Ling-yue Liu
  • Wei Chen
  • Tien-tsin Wong
  • Wen-ting Zheng
  • Wei-dong Geng
Article

Abstract

Digital image halftoning is a widely used technique. However, achieving high fidelity tone reproduction and structural preservation with low computational time cost remains a challenging problem. This paper presents a highly parallel algorithm to boost real-time application of serial structure-preserving error diffusion. The contrast-aware halftoning approach is one such technique with superior structure preservation, but it offers only a limited opportunity for graphics processing unit (GPU) acceleration. Our method integrates contrast-aware halftoning into a new parallelizable error-diffusion halftoning framework. To eliminate visually disturbing artifacts resulting from parallelization, we propose a novel multiple quantization model and space-filling curve to maintain tone consistency, blue-noise property, and structure consistency. Our GPU implementation on a commodity personal computer achieves a real-time performance for a moderately sized image. We demonstrate the high quality and performance of the proposed approach with a variety of examples, and provide comparisons with state-of-the-art methods.

Key words

Digital image halftoning Error diffusion GPU Quantization Space-filling curve 

CLC number

TP391 

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Copyright information

© Journal of Zhejiang University Science Editorial Office and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Ling-yue Liu
    • 1
  • Wei Chen
    • 1
  • Tien-tsin Wong
    • 2
  • Wen-ting Zheng
    • 1
  • Wei-dong Geng
    • 1
  1. 1.State Key Lab of CAD & CGZhejiang UniversityHangzhouChina
  2. 2.Department of Computer Science and EngineeringThe Chinese University of Hong KongHong KongChina

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