On Hybrid Directional Transform-Based Intra-band Image Coding

  • Alin Alecu
  • Adrian Munteanu
  • Aleksandra Pižurica
  • Jan Cornelis
  • Peter Schelkens
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4678)


In this paper, we propose a generic hybrid oriented-transform and wavelet-based image representation for intra-band image coding. We instantiate for three popular directional transforms having similar powers of approximation but different redundancy factors. For each transform type, we design a compression scheme wherein we exploit intra-band coefficient dependencies. We show that our schemes outperform alternative approaches reported in literature. Moreover, on some images, we report that two of the proposed codec schemes outperform JPEG2000 by over 1dB. Finally, we investigate the trade-off between oversampling and sparsity and show that, at low rates, hybrid coding schemes with transform redundancy factors as high as 1.25 to 5.8 are capable in fact of outperforming JPEG2000 and its critically-sampled wavelets.


Discrete Wavelet Transform Compression Scheme Frequency Plane Detail Signal Redundancy Factor 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Alin Alecu
    • 1
  • Adrian Munteanu
    • 1
  • Aleksandra Pižurica
    • 2
  • Jan Cornelis
    • 1
  • Peter Schelkens
    • 1
  1. 1.Dept. of Electronics and Informatics, Vrije Universiteit Brussel – Interdisciplinary Institute for Broadband Technology (IBBT), Pleinlaan 2, 1050 BrusselsBelgium
  2. 2.Dept. of Telecommunications and Information Processing, Ghent University, Sint-Pietersnieuwstraat 41, 9000 GentBelgium

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