Fuzzy clustering and soft switching of linear regression models for reversible image compression

Bruno Aiazzi; Pasquale S. Alba; Luciano Alparone; Stefano Baronti

doi:10.1117/12.326716

13 October 1998 Fuzzy clustering and soft switching of linear regression models for reversible image compression

Bruno Aiazzi, Pasquale S. Alba, Luciano Alparone, Stefano Baronti

Proceedings Volume 3455, Applications and Science of Neural Networks, Fuzzy Systems, and Evolutionary Computation; (1998) https://doi.org/10.1117/12.326716
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

This paper describes an original application of fuzzy logic to reversible compression of 2D and 3D data. The compression method consists of a space-variant prediction followed by context- based classification ad arithmetic coding of the outcome residuals. Prediction of a pixel to be encoded is obtained from the fuzzy-switching of a set of linear regression predictors. The coefficients of each predictor are calculated so as to minimize prediction MSE for those pixels whose graylevel patterns, lying on a causal neighborhood of prefixed shape, are vectors belonging in a fuzzy sense to one cluster. In the 3D case, pixels both on the current slice and on previously encoded slices may be used. The size and shape of the causal neighborhood, as well as the number of predictors to be switched, may be chosen before running the algorithm and determine the trade-off between coding performance sand computational cost. The method exhibits impressive performances, for both 2D and 3D data, mainly thanks to the optimality of predictors, due to their skill in fitting data patterns.

Citation Download Citation

Bruno Aiazzi, Pasquale S. Alba, Luciano Alparone, and Stefano Baronti "Fuzzy clustering and soft switching of linear regression models for reversible image compression", Proc. SPIE 3455, Applications and Science of Neural Networks, Fuzzy Systems, and Evolutionary Computation, (13 October 1998); https://doi.org/10.1117/12.326716

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