关键词: SVM, 置信度评估, 决策风险值, 局部分类器, 局部测度

Abstract: An algorithm of confidence evaluation for SVM is presented. Based on the evaluation， decision risk is specified in the context of multi-classification. Evaluation approach combines the theoretic analysis and empirical analysis. The decision with low confidence is refined by a local classifier that is formulated online. The local classifier works in query’s neighborhood，and the neighborhood is developed according to a local metric. Experiments demonstrate the fine performance of the designed algorithm， and its improvement in classification accuracy over the state of the arts.

Key words: SVM, confidence evaluation, decision risk amount, local classifier, local metric