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| SVM Active Feedback Scheme Using Semi-Supervised Ensemble with Bias |
| WU Jun,DUAN Jing,LU Ming-Yu |
| School of Information Science and Technology,Dalian Maritime University,Dalian 116026 |
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Abstract Most SVM-based active learning methods are challenged by the small sample problem and the asymmetric distribution problems. A SVM-based active relevance feedback scheme is presented which deals with SVM ensemble under semi-supervised setting to augment the diversity among the individual SVM classifiers, thus a powerful ensemble classification model is obtained. Meanwhile, the powerful ensemble model is helpful to identify the most informative images for active learning. Moreover, aggregation method, termed as bias-weighting, is used within the semi-supervised ensemble framework to tackle the asymmetric distribution between positive and negative samples. Under the influence of bias-weighting, the ensemble classification model pays more attention on the positive samples than the negative ones. Experimental results validate the superiority of the presented scheme over several existing active learning methods.
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Received: 24 May 2010
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2010, Vol. 23 
