MILES: Multiple-Instance Learning via Embedded Instance Selection

Yixin Chen, Jinbo Bi, J.Z. Wang
2006 IEEE Transactions on Pattern Analysis and Machine Intelligence  
Multiple-instance problems arise from the situations where training class labels are attached to sets of samples (named bags), instead of individual samples within each bag (called instances). Most previous multiple-instance learning (MIL) algorithms are developed based on the assumption that a bag is positive if and only if at least one of its instances is positive. Although the assumption works well in a drug activity prediction problem, it is rather restrictive for other applications,
more » ... lly those in the computer vision area. We propose a learning method, MILES (Multiple-Instance Learning via Embedded instance Selection), which converts the multiple-instance learning problem to a standard supervised learning problem that does not impose the assumption relating instance labels to bag labels. MILES maps each bag into a feature space defined by the instances in the training bags via an instance similarity measure. This feature mapping often provides a large number of redundant or irrelevant features. Hence 1-norm SVM is applied to select important features as well as construct classifiers simultaneously. We have performed extensive experiments. In comparison with other methods, MILES demonstrates competitive classification accuracy, high computation efficiency, and robustness to labeling uncertainty. Index Terms-Multiple-instance learning, feature subset selection, 1-norm support vector machine, image categorization, object recognition, drug activity prediction. Yixin Chen (S'99-M'03) received the B.S. degree from the Department of Automation, Beijing Polytechnic University, China, in 1995, the M.S. degree in control theory and application from Tsinghua University, China, in 1998, and the M.S. and Ph.D. degrees in electrical engineering from the University of Wyoming, Laramie, WY, in
doi:10.1109/tpami.2006.248 pmid:17108368 fatcat:sgjls2smpvfdjas7boboxgppoy