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<p><it>Abstract</it>—Statistical clustering methods have long been used for a variety of signal processing applications, including both classification and vector quantization for signal compression. We describe a method of combining classification and compression into a single vector quantizer by incorporating a Bayes risk term into the distortion measure used in the quantizer design algorithm. Once trained, the quantizer can operate to minimize the Bayes risk weighted distortion measure if there is a model providing the required posterior probabilities, or it can operate in a suboptimal fashion by minimizing only squared error. Comparisons are made with other vector quantizer based classifiers, including the independent design of quantization and minimum Bayes risk classification and Kohonen’s LVQ. A variety of examples demonstrate that the proposed method can provide classification ability close to or superior to LVQ while simultaneously providing superior compression performance.</p>
Image compression, image classification, vector quantization, image coding, statistical clustering.
Karen L. Oehler, Robert M. Gray, "Combining Image Compression and Classification Using Vector Quantization", IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 17, no. , pp. 461-473, May 1995, doi:10.1109/34.391396
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