A spatial/frequency hybrid vector quantizer based on a classification in the DCT domain

  • Authors:

  • Zhe-Ming Lu;Hui Pei;Hans Burkhardt

  • Affiliations:

  • Institute for Computer Science, University of Freiburg, Freiburg i.Br., Germany;Department of Automatic Test and Control, Harbin Institute of Technology, Harbin, China;Institute for Computer Science, University of Freiburg, Freiburg i.Br., Germany

  • Venue:
  • CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part II
  • Year:
  • 2005

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Abstract

A simple and efficient image vector quantizer (VQ) based on a classification in the DCT domain is presented. Each 8×8 image block is quantized with ordinary VQ (OVQ) or transformed VQ (TVQ), which is determined by the three low-frequency DCT coefficients. Experimental results show that the proposed approach can achieve promising performance.