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On Flat versus Hierarchical Classification in Large-Scale Taxonomies

Abstract : We study in this paper flat and hierarchical classification strategies in the context of large-scale taxonomies. To this end, we first propose a multiclass, hierarchical data dependent bound on the generalization error of classifiers deployed in large-scale taxonomies. This bound provides an explanation to several empirical results reported in the literature, related to the performance of flat and hierarchical classifiers. We then introduce another type of bounds targeting the approximation error of a family of classifiers, and derive from it features used in a meta-classifier to decide which nodes to prune (or flatten) in a large-scale taxonomy. We finally illustrate the theoretical developments through several experiments conducted on two widely used taxonomies.
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Contributor : Rohit Babbar Connect in order to contact the contributor
Submitted on : Monday, February 10, 2014 - 12:57:42 PM
Last modification on : Thursday, October 21, 2021 - 3:48:23 AM


  • HAL Id : hal-00944215, version 1



Massih-Reza Amini, Rohit Babbar, Eric Gaussier, Ioannis Partalas. On Flat versus Hierarchical Classification in Large-Scale Taxonomies. Advances in Neural Information Processing Systems 26, Dec 2012, United States. pp.1824--1832. ⟨hal-00944215⟩



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