Discriminative ICA model with reconstruction constraint for image classification
Proceedings of the 20th ACM international conference on Multimedia
An adaptive regularization method for sparse representation
Integrated Computer-Aided Engineering
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In this work, we propose a novel supervised matrix factorization method used directly as a multi-class classifier. The coefficient#x2113;_{1}-norm regularization. The basis matrix is composed of atom dictionaries from different classes, which are trained in a jointly supervised manner by penalizing inhomogeneous representations given the labeled data samples. The learned basis matrix models the data of interest as a union of discriminative linear subspaces by sparse projection. The proposed model is based on the observation that many high-dimensional natural signals lie in a much lower dimensional subspaces or union of subspaces. Experiments conducted on several datasets show the effectiveness of such a representation model for classification, which also suggests that a tight reconstructive representation model could be very useful for discriminant analysis.