Shrinkage Expansion Adaptive Metric Learning

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This matlab code package demonstrates an example of face verification on LFW and PubFig face databases by the method proposed in: “Shrinkage Expansion Adaptive Metric Learning”.

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Authors Qilong Wang, Wangmeng Zuo, Lei Zhang, and Peihua Li
Journal/Conference Name European Conference on Computer Vision 2014
Paper Category
Paper Abstract Conventional pairwise constrained metric learning methods usually restrict the distance between samples of a similar pair to be lower than a fixed upper bound, and the distance between samples of a dissimilar pair higher than a fixed lower bound. Such fixed bound based constraints, however, may not work well when the intra- and inter-class variations are complex. In this paper, we pro-pose a shrinkage expansion adaptive metric learning (SEAML) method by defining a novel shrinkage-expansion rule for adaptive pairwise constraints. SEAML is very effective in learning metrics from data with complex distributions. Mean-while, it also suggests a new rule to assess the similarity between a pair of samples based on whether their distance is shrunk or expanded after metric learning. Our extensive experimental results demonstrated that SEAML achieves better performance than state-of-the-art metric learning methods. In addition, the pro-posed shrinkage-expansion adaptive pairwise constraints can be readily applied to many other pairwise constrained metric learning algorithms, and boost significantly their performance in applications such as face verification on LFW and PubFig databases.
Date of publication 2014
Code Programming Language MATLAB

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