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In large scale visual pattern recognition applications, when the subject set is large the traditional linear models like PCA/LDA/LPP, become inadequate in capturing the non-linearity and local variations of visual appearance manifold. Kernelized solutions can alleviate the problem to certain degree, but faces a computational complexity challenge of solving eigen or QP problems of size n x n for number of training samples n. In this work, we developed a novel solution to this problem by applying a data partition first and obtain a rich set of local data patch models, then the hierarchical structure of this rich set of models are computed with subspace clustering on Grassmanian manifold, via a VQ like algorithm with data partition locality constraint. At query time, a probe image is projected to the data space partition first to obtain the probe model, and the optimal local model is computed by traversing the model hierarchical tree. Simulation results demonstrated the effectiveness of this solution in computational efficiency and recognition accuracy, with applications in large subject set face recognition and image retrieval. [Bio] Zhu Li is currently a Senior Staff Researcher and Media Analytics & Processing Group Lead with the Media Networking Lab, Core Networks Research, FutureWei (Huawei) Technology USA, at Bridgewater, New Jersey. He received his PhD in Electrical & Computer Engineering from Northwestern University, Evanston in 2004. He was an Assistant Professor with the Dept of Computing, The Hong Kong Polytechnic University from 2008 to 2010, and a Senior Research Engineer, Senior Staff Research Engineering, and then Principal Staff Research Engineer with the Multimedia Research Lab (MRL), Motorola Labs, Schaumburg, Illinois, from 2000 to 2008. His research interests include audio-visual analytics and machine learning with its application in large scale video repositories annotation, search and recommendation, as well as video adaptation, source-channel coding and distributed optimization issues of the wireless video networks. He has 21 issued or pending patents, 70+ publications in book chapters, journals, conference proceedings and standards contributions in these areas. He is an IEEE senior member, elected Vice Chair of the IEEE Multimedia Communication Technical Committee (MMTC) 2008~2010, co-editor for the Springer-Verlag book on "Intelligent Video Communication: Techniques and Applications". He served on numerous conference and workshop TPCs and was symposium co-chair at IEEE ICC'2008, and on Best Paper Award Committee for IEEE ICME 2010. He received the Best Poster Paper Award from IEEE Int'l Conf on Multimedia & Expo (ICME) at Toronto, 2006, and the Best Paper Award from IEEE Int'l Conf on Image Processing (ICIP) at San Antonio, 2007.
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