Multiclass Ridge-adjusted Slack Variable Optimization using selected basis for fast classification | IEEE Conference Publication | IEEE Xplore

Multiclass Ridge-adjusted Slack Variable Optimization using selected basis for fast classification


Abstract:

Kernel techniques for classification is especially challenging in terms of computation and memory requirement when data fall into more than two categories. In this paper,...Show More

Abstract:

Kernel techniques for classification is especially challenging in terms of computation and memory requirement when data fall into more than two categories. In this paper, we extend a binary classification technique called Ridge-adjusted Slack Variable Optimization (RiSVO) to its multiclass counterpart where the label information encoding scheme allows the computational complexity to remain the same to the binary case. The main features of this technique are summarized as follows: (1) Only a subset of data are pre-selected to construct the basis for kernel computation; (2) Simultaneous active training set selection for all classes helps reduce complexity meanwhile improving robustness; (3) With the proposed active set selection criteria, inclusion property is verified empirically. Inclusion property means that once a pattern is excluded, it will no longer return to the active training set and therefore can be permanently removed from the training procedure. This property greatly reduce the complexity. The proposed techniques are evaluated on standard multiclass datasets MNIST, USPS, pendigits and letter which could be easily compared with existing results.
Date of Conference: 01-05 September 2014
Date Added to IEEE Xplore: 13 November 2014
Electronic ISBN:978-0-9928-6261-9

ISSN Information:

Conference Location: Lisbon, Portugal

References

References is not available for this document.