Agnostic Learning of Geometric Patterns - Semantic Scholar

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Washington University in St. Louis

Washington University Open Scholarship All Computer Science and Engineering Research

Computer Science and Engineering

Report Number: WUCS-98-27 1998-01-01

Agnostic Learning of Geometric Patterns Authors: Sally A. Goldman, Stephen S. Kwek, and Stephen D. Scott Goldberg, Goldman, and Scott demonstrated how the problem of recognizing a landmark from a onedimensional visual image can be mapped to that of learning a one-dimensional geometric pattern and gave a PAC algorithm to learn that class. In this paper, we present an efficient on-line agnostic learning algorithm for learning the class of constant-dimension geometric patterns. Our algorithm can tolerate both classification and attribute noise. By working in higher dimensional spaces we can represent more features from the visual image in the geometric pattern. Our mapping of the data to a geometric pattern, and hence our learning algorithm, is applicable to any data representable as a constant-dimensional array of values, e.g. sonar data, temporal difference information, or amplitudes of a waveform. To our knowledge, these classes of patterns are more complex than any class of geometric patterns previously studied. Also, our results are easily adapted to learn the union of fixed-dimensional boxes from multiple-instance examples. Finally, our algorithms are tolerant of concept shift. ... Read complete abstract on page 2.

Follow this and additional works at: http://openscholarship.wustl.edu/cse_research Part of the Computer Engineering Commons, and the Computer Sciences Commons Recommended Citation Goldman, Sally A.; Kwek, Stephen S.; and Scott, Stephen D., "Agnostic Learning of Geometric Patterns" Report Number: WUCS-98-27 (1998). All Computer Science and Engineering Research. http://openscholarship.wustl.edu/cse_research/475

Department of Computer Science & Engineering - Washington University in St. Louis Campus Box 1045 - St. Louis, MO - 63130 - ph: (314) 935-6160.

Agnostic Learning of Geometric Patterns Complete Abstract: Goldberg, Goldman, and Scott demonstrated how the problem of recognizing a landmark from a onedimensional visual image can be mapped to that of learning a one-dimensional geometric pattern and gave a PAC algorithm to learn that class. In this paper, we present an efficient on-line agnostic learning algorithm for learning the class of constant-dimension geometric patterns. Our algorithm can tolerate both classification and attribute noise. By working in higher dimensional spaces we can represent more features from the visual image in the geometric pattern. Our mapping of the data to a geometric pattern, and hence our learning algorithm, is applicable to any data representable as a constant-dimensional array of values, e.g. sonar data, temporal difference information, or amplitudes of a waveform. To our knowledge, these classes of patterns are more complex than any class of geometric patterns previously studied. Also, our results are easily adapted to learn the union of fixed-dimensional boxes from multiple-instance examples. Finally, our algorithms are tolerant of concept shift.

This technical report is available at Washington University Open Scholarship: http://openscholarship.wustl.edu/cse_research/475