A union of incoherent spaces model for classification

We present a new and computationally efficient scheme for classifying signals into a fixed number of known classes. We model classes as subspaces in which the corresponding data is well represented by a dictionary of features. In order to ensure low misclassification, the subspaces should be incoherent so that features of a given class cannot represent efficiently signals from another. We propose a simple iterative strategy to learn dictionaries which are are the same time good for approximating within a class and also discriminant. Preliminary tests on a standard face images database show competitive results.

• Type: Conference
• Year: 2010
• Where: ICASSP
• Authors: Karin Schnass, Pierre Vandergheynst
• Keywords: Efficient Scheme, ICASSP 2010, Signal Processing, Simple Iterative Strategy, fixed Number