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Related Experiment Videos

Image compression with a hybrid wavelet-fractal coder.

J Li1, C J Kuo

  • 1Sharp Laboratories of America, Camas, WA 98607, USA. lijin@sharplabs.com

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|February 13, 2008
PubMed
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A new hybrid wavelet-fractal coder (WFC) improves image compression by adaptively predicting wavelet coefficients using fractal methods. This approach offers superior performance and rate savings for efficient digital image storage and transmission.

Area of Science:

  • * Digital Image Processing
  • * Signal Processing
  • * Computer Vision

Background:

  • * Traditional image compression methods face limitations in achieving high compression ratios while maintaining image quality.
  • * Wavelet transforms offer multi-resolution analysis but can be computationally intensive.
  • * Fractal-based methods show potential for exploiting self-similarity in images.

Purpose of the Study:

  • * To introduce a novel hybrid wavelet-fractal coder (WFC) for enhanced image compression.
  • * To leverage fractal contractive mapping for predicting wavelet coefficients.
  • * To adaptively apply fractal prediction for optimal rate savings.

Main Methods:

  • * Development of a hybrid wavelet-fractal coder (WFC).
  • * Utilization of fractal contractive mapping to predict higher-resolution wavelet coefficients from lower-resolution ones.

Related Experiment Videos

  • * Encoding of prediction residues using a bitplane wavelet coder.
  • * Adaptive application of fractal prediction based on a derived rate-distortion criterion.
  • * Optimization of fractal parameters for the WFC.

    • Main Results:

    • * The WFC demonstrates superior performance compared to existing methods.
    • * Adaptive fractal prediction effectively identifies regions with significant rate savings.
    • * The derived rate-distortion criterion accurately guides the selection of optimal fractal parameters.
    • * Extensive experimental results validate the proposed WFC's effectiveness.

    Conclusions:

    • * The hybrid wavelet-fractal coder (WFC) presents a significant advancement in image compression technology.
    • * Adaptive fractal prediction is a key component for achieving efficient compression.
    • * The WFC offers a promising solution for high-quality, high-compression image storage and transmission.