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A Kernel Classifier using Linearised Bregman Iteration

Authors: K. A. D. N. K Wimalawarne


In this paper we introduce a novel kernel classifier based on a iterative shrinkage algorithm developed for compressive sensing. We have adopted Bregman iteration with soft and hard shrinkage functions and generalized hinge loss for solving l1 norm minimization problem for classification. Our experimental results with face recognition and digit classification using SVM as the benchmark have shown that our method has a close error rate compared to SVM but do not perform better than SVM. We have found that the soft shrinkage method give more accuracy and in some situations more sparseness than hard shrinkage methods.

Keywords: Compressive Sensing, Bregman iteration, Generalisedhinge loss, sparse, kernels, shrinkage functions

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