Who needs labels anyway (or unsupervised supervised learning)

Abstract:
Many popular linear classifiers, such as logistic regression, boosting, or SVM, are trained by optimizing a margin-based risk function. Traditionally, these risk functions are computed based on a labeled data set. We develop a novel technique for estimating such risks using only unlabeled data and the marginal label distribution.
We prove that the proposed risk estimator is consistent on high-dimensional data sets and demonstrate it on synthetic and real-world data. In particular, we show how the estimate is used for evaluating classifiers in transfer learning, and for training classifiers with no labeled data whatsoever.

תאריך: 
16/05/2012 - 00:15
מרצה: 
Guy Lebanon
דוא"ל להרשמה: 
Affiliation: 
Georgia Institute of Technology
מיקום: 
building 1103, Room 329