Open Access

Evolutionary Approach to Improve Wavelet Transforms for Image Compression in Embedded Systems

  • Rubén Salvador1Email author,
  • Félix Moreno1,
  • Teresa Riesgo1 and
  • Lukáš Sekanina2
EURASIP Journal on Advances in Signal Processing20102011:973806

https://doi.org/10.1155/2011/973806

Received: 21 July 2010

Accepted: 30 November 2010

Published: 12 December 2010

Abstract

A bioinspired, evolutionary algorithm for optimizing wavelet transforms oriented to improve image compression in embedded systems is proposed, modelled, and validated here. A simplified version of an Evolution Strategy, using fixed point arithmetic and a hardware-friendly mutation operator, has been chosen as the search algorithm. Several cutdowns on the computing requirements have been done to the original algorithm, adapting it for an FPGA implementation. The work presented in this paper describes the algorithm as well as the test strategy developed to validate it, showing several results in the effort to find a suitable set of parameters that assure the success in the evolutionary search. The results show how high-quality transforms are evolved from scratch with limited precision arithmetic and a simplified algorithm. Since the intended deployment platform is an FPGA, HW/SW partitioning issues are also considered as well as code profiling accomplished to validate the proposal, showing some preliminary results of the proposed hardware architecture.

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Authors’ Affiliations

(1)
Centre of Industrial Electronics, Universidad Politécnica de Madrid
(2)
Faculty of Information Technology, Brno University of Technology

Copyright

© Rubén Salvador et al. 2011

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.