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Type: Artigo de periódico
Title: Robust Pruning of Training Patterns for Optimum-Path Forest Classification Applied to Satellite-Based Rainfall Occurrence Estimation
Author: Papa, JP
Falcao, AX
de Freitas, GM
de Avila, AMH
Abstract: The decision correctness in expert systems strongly depends on the accuracy of a pattern classifier, whose learning is performed from labeled training samples. Some systems, however, have to manage, store, and process a large amount of data, making also the computational efficiency of the classifier an important requirement. Examples are expert systems based on image analysis for medical diagnosis and weather forecasting. The learning time of any pattern classifier increases with the training set size, and this might be necessary to improve accuracy. However, the problem is more critical for some popular methods, such as artificial neural networks and support vector machines (SVM), than for a recently proposed approach, the optimum-path forest (OPF) classifier. In this letter, we go beyond by presenting a robust approach to reduce the training set size and still preserve good accuracy in OPF classification. We validate the method using some data sets and for rainfall occurrence estimation based on satellite image analysis. The experiments use SVM and OPF without pruning of training patterns as baselines.
Subject: Expert systems
image analysis
pattern recognition
rainfall estimation
remote sensing
Country: EUA
Editor: Ieee-inst Electrical Electronics Engineers Inc
Citation: Ieee Geoscience And Remote Sensing Letters. Ieee-inst Electrical Electronics Engineers Inc, v. 7, n. 2, n. 396, n. 400, 2010.
Rights: fechado
Identifier DOI: 10.1109/LGRS.2009.2037344
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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