Analysis-based coding of image transform and subband coefficients

V. Ralph Algazi; Robert R. Estes Jr.

doi:10.1117/12.217394

22 August 1995 Analysis-based coding of image transform and subband coefficients

V. Ralph Algazi, Robert R. Estes Jr.

Proceedings Volume 2564, Applications of Digital Image Processing XVIII; (1995) https://doi.org/10.1117/12.217394
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Image coding requires an effective representation of images to provide dimensionality reduction, a quantization strategy to maintain quality, and finally the error free encoding of quantized coefficients. In the coding of quantized coefficients, Huffman coding and arithmetic coding have been used most commonly and are suggested as alternatives in the JPEG standard. In some recent work, zerotree coding has been proposed as an alternate method, that considers the dependece of quantized coefficients from subband to subband, and thus appears as a generalization of the context-based approach often used with arithmetic coding. In this paper, we propose to review these approaches and discuss them as special cases of an analysis based approach to the coding of coefficients. The requirements on causality and computational complexity implied by arithmetic and zerotree coding will be studied and other schemes proposed for the choice of the predictive coefficient contexts that are suggested by image analysis.

Citation Download Citation

V. Ralph Algazi and Robert R. Estes Jr. "Analysis-based coding of image transform and subband coefficients", Proc. SPIE 2564, Applications of Digital Image Processing XVIII, (22 August 1995); https://doi.org/10.1117/12.217394

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