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Boosting in the presence of noise
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Source Annual ACM Symposium on Theory of Computing archive
Proceedings of the thirty-fifth annual ACM symposium on Theory of computing table of contents
San Diego, CA, USA
SESSION: Session 4B table of contents
Pages: 195 - 205  
Year of Publication: 2003
ISBN:1-58113-674-9
Authors
Adam Kalai  M.I.T., Cambridge, MA
Rocco A. Servedio  Columbia University, New York, NY
Sponsors
ACM: Association for Computing Machinery
SIGACT: ACM Special Interest Group on Algorithms and Computation Theory
Publisher
ACM  New York, NY, USA
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Downloads (6 Weeks): 4,   Downloads (12 Months): 30,   Citation Count: 4
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ABSTRACT

Boosting algorithms are procedures that "boost" low accuracy weak learning algorithms to achieve arbitrarily high accuracy. Over the past decade boosting has been widely used in practice and has become a major research topic in computational learning theory. In this paper we study boosting in the presence of random classification noise, giving both positive and negative results.We show that a modified version of a boosting algorithm due to Mansour and McAllester [14] can achieve accuracy arbitrarily close to the noise rate. We also give a matching lower bound by showing that no efficient black-box boosting algorithm can boost accuracy beyond the noise rate (assuming that one-way functions exist). Finally, we consider a variant of the standard scenario for boosting in which the "weak learner" satisfies a slightly stronger condition than the usual weak learning guarantee. We give an efficient algorithm in this framework which can boost to arbitrarily high accuracy in the presence of classification noise.


REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

 
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A. Blum, A. Frieze, R. Kannan, and S. Vempala. A polynomial time algorithm for learning noisy linear threshold functions. Algorithmica, 22(1/2):35--52, 1997.
 
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J. Friedman, T. Hastie, and R. Tibshirani. Additive logistic regression: A statistical view of boosting. The Annals of Statistics, 28:337 -- 374, 2000.
 
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A. Kalai and R. Servedio. On the boosting ability of oblivious decision graphs. Unpublished manuscript, 2003.
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Y. Mansour and D. McAllester. Boosting using branching programs. Journal of Computer and System Sciences, 64(1):103--112, 2002.
 
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Collaborative Colleagues:
Adam Kalai: colleagues
Rocco A. Servedio: colleagues