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Modified Bacterial Foraging Optimization Technique for Vector Quantization-Based Image Compression

  • Nandita Sanyal
  • Amitava Chatterjee
  • Sugata Munshi
Chapter

Abstract

Vector quantization (VQ) techniques are well-known methodologies that have attracted the attention of research communities all over the world to provide solutions for image compression problems. Generation of a near optimal codebook that can simultaneously achieve a very high compression ratio and yet maintain required quality in the reconstructed image (by achieving a high peak-signal-to-noise-ratio (PSNR)), to provide high fidelity, poses a real research challenge. This chapter demonstrates how such efficient VQ schemes can be developed where the near optimal codebooks can be designed by employing a contemporary stochastic optimization technique, namely bacterial foraging optimization (BFO), that mimics the foraging behavior of a common type of bacteria, Escherichia coli, popularly known as E. coli. An improved methodology is proposed here, over the basic BFO scheme, to perform the chemotaxis procedure within the BFO algorithm in a more efficient manner, which is utilized to solve this image compression problem. The codebook design procedure has been implemented using a fuzzy membership-based method, and the optimization procedure attempts to determine suitable free parameters of these fuzzy sets. The usefulness of the proposed adaptive BFO algorithm, along with the basic BFO algorithm, has been demonstrated by implementing them for a number of benchmark images, and their performances have been compared with other contemporary methods, used to solve similar problems.

Keywords

Image Compression Vector Quantization Training Vector Codebook Size Codebook Vector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Nandita Sanyal
    • 1
  • Amitava Chatterjee
    • 2
  • Sugata Munshi
    • 2
  1. 1.Department of Electrical EngineeringB. P. Poddar Institute of Management and TechnologyKolkataIndia
  2. 2.Department of Electrical EngineeringJadavpur UniversityKolkataIndia

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