Classification of rare events with high reliability
First Claim
1. A hierarchical classifier for classifying data samples into a first majority result class or a second minority result class, the hierarchical classifier comprising a first stage classifier which classifies input samples into the first result class, or passes the samples on to a second stage classifier which classifies samples from the first stage classifier into the first result class or the second result class.
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Abstract
Hierarchical classification of samples. First stage classification identifies most members of the majority class and removes them from further consideration. Second stage classification then focuses on discriminating between the minority class and the greatly reduced number of majority class samples lying near the decision boundary.
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Citations
15 Claims
- 1. A hierarchical classifier for classifying data samples into a first majority result class or a second minority result class, the hierarchical classifier comprising a first stage classifier which classifies input samples into the first result class, or passes the samples on to a second stage classifier which classifies samples from the first stage classifier into the first result class or the second result class.
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11. The method of training a hierarchical classifier for classifying data samples which are members of a first majority input class or a second minority input class into a first result class or a second result class comprising:
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selecting a first classification model, training the first model, selecting a second classification model, and training the second classification model. - View Dependent Claims (12, 13, 14, 15)
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Specification