Optimization for pattern classification using biased random search techniques |
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Authors: | Gabor T. Herman Dewey Odhner K. T. Daniel Yeung |
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Affiliation: | (1) Medical Image Processing Group, Department of Radiology, University of Pennsylvania, 418 Service Drive, 19104-6021 Philadelphia, PA, USA |
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Abstract: | We demonstrate how optimization problems arise in the field of pattern classification, in particular in using piecewise-linear classification and classification based on an optimal linear separator. We motivate the need in this area for a general purpose optimization approach. We discuss ALOPEX, a biased random search approach, from the point of view of this need. While ALOPEX itself failed to fulfil our need, a newly-introduced generalization of it (iterated ALOPEX) was found to be appropriate for the optimization problems of our particular concern. We conclude the paper with a brief critical evaluation of this approach as compared to our original aims. |
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