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Unsupervised Metric Fusion Over Multiview Data by Graph Random Walk-Based Cross-View Diffusion | IEEE Journals & Magazine | IEEE Xplore

Unsupervised Metric Fusion Over Multiview Data by Graph Random Walk-Based Cross-View Diffusion


Abstract:

Learning an ideal metric is crucial to many tasks in computer vision. Diverse feature representations may combat this problem from different aspects; as visual data objec...Show More

Abstract:

Learning an ideal metric is crucial to many tasks in computer vision. Diverse feature representations may combat this problem from different aspects; as visual data objects described by multiple features can be decomposed into multiple views, thus often provide complementary information. In this paper, we propose a cross-view fusion algorithm that leads to a similarity metric for multiview data by systematically fusing multiple similarity measures. Unlike existing paradigms, we focus on learning distance measure by exploiting a graph structure of data samples, where an input similarity matrix can be improved through a propagation of graph random walk. In particular, we construct multiple graphs with each one corresponding to an individual view, and a cross-view fusion approach based on graph random walk is presented to derive an optimal distance measure by fusing multiple metrics. Our method is scalable to a large amount of data by enforcing sparsity through an anchor graph representation. To adaptively control the effects of different views, we dynamically learn view-specific coefficients, which are leveraged into graph random walk to balance multiviews. However, such a strategy may lead to an over-smooth similarity metric where affinities between dissimilar samples may be enlarged by excessively conducting cross-view fusion. Thus, we figure out a heuristic approach to controlling the iteration number in the fusion process in order to avoid over smoothness. Extensive experiments conducted on real-world data sets validate the effectiveness and efficiency of our approach.
Published in: IEEE Transactions on Neural Networks and Learning Systems ( Volume: 28, Issue: 1, January 2017)
Page(s): 57 - 70
Date of Publication: 07 December 2015

ISSN Information:

PubMed ID: 26672050

Funding Agency:


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