Partial Label Learning via Feature-Aware Disambiguation
Min-Ling Zhang*, Southeast University; Binbin Zhou, Southeast University; Xu-Ying Liu, Southeast University
Partial label learning deals with the problem where each training example is represented by a feature vector while associated with a set of candidate labels, among which only one label is valid. To learn from such ambiguous labeling information, the key is to try to disambiguate the candidate label sets of partial label training examples. Existing disambiguation strategies work by either identifying the ground-truth label iteratively or treating each candidate label equally. Nonetheless, the disambiguation process is generally conducted by focusing on manipulating the label space, and thus ignores making full use of potentially useful information from the feature space. In this paper, a novel two-stage approach is proposed to learning from partial label examples based on feature-aware disambiguation. In the ﬁrst stage, the manifold structure of feature space is utilized to generate normalized labeling conﬁdences over candidate label set. In the second stage, the predictive model is learned by performing regularized multi-output regression over the generated labeling conﬁdences. Extensive experiments on artiﬁcial as well as real-world partial label data sets clearly validate the superiority of the proposed feature-aware disambiguation approach.
Filed under: Semi-Supervised Learning