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The Tradeoff Between Generative and Discriminative Classifiers

Guillaume Bouchard 1 Bill Triggs 2
2 LEAR - Learning and recognition in vision
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes, CNRS - Centre National de la Recherche Scientifique : FR71
Abstract : Given any generative classifier based on an inexact density model, we can define a discriminative counterpart that reduces its asymptotic error rate. We introduce a family of classifiers that interpolate the two approaches, thus providing a new way to compare them and giving an estimation procedure whose classification performance is well balanced between the bias of generative classifiers and the variance of discriminative ones. We show that an intermediate trade-off between the two strategies is often preferable, both theoretically and in experiments on real data.
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Guillaume Bouchard, Bill Triggs. The Tradeoff Between Generative and Discriminative Classifiers. 16th IASC International Symposium on Computational Statistics (COMPSTAT '04), Aug 2004, Prague, Czech Republic. pp.721--728. ⟨inria-00548546⟩

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