Large Margin Classification Using the Perceptron Algorithm

We introduce and analyze a new algorithm for linear classification which combines Rosenblatt's perceptron algorithm with Helmbold and Warmuth's leave-one-out method. Like Vapnik's maximal-margin classifier, our algorithm takes advantageof data that are linearly separable with large margins. Compared to Vapnik's algorithm, however, ours is much simpler to implement, and much more efficient in terms of computation time. We also show that our algorithm can be efficiently used in very high dimensional spaces using kernel functions. We performedsome experimentsusing our algorithm, and some variants of it, for classifying images of handwritten digits. The performance of our algorithm is close to, but not as good as, the performance of maximal-margin classifiers on the same problem, while saving significantly on computation time and programming effort.

• Type: Conference
• Year: 1998
• Where: COLT
• Authors: Yoav Freund, Robert E. Schapire
• Keywords: Algorithm, COLT 1998, Machine Learning, Maximal-margin Classifiers, Rosenblatt's Perceptron Algorithm