2012 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops (2008)
Anchorage, AK, USA
June 23, 2008 to June 28, 2008
Sethuraman Panchanathan , Center for Cognitive Ubiquitous Computing (CUbiC), School of Computing and Informatics, Arizona State University, USA
Shayok Chakraborty , School of Computing and Informatics, Arizona State University, USA
Vineeth Balasubramanian , Center for Cognitive Ubiquitous Computing (CUbiC), School of Computing and Informatics, Arizona State University, USA
An important facet of learning in an online setting is the confidence associated with a prediction on a given test data point. In an online learning scenario, it would be expected that the system can increase its confidence of prediction as training data increases. We present a statistical approach in this work to associate a confidence value with a predicted class label in an online learning scenario. Our work is based on the existing work on Transductive Confidence Machines (TCM) , which provided a methodology to define a heuristic confidence measure. We applied this approach to the problem of head pose classification from face images, and extended the framework to compute a confidence value when multiple cues are extracted from images to perform classification. Our approach is based on combining the results of multiple hypotheses and obtaining an integrated p-value to validate a single test hypothesis. From our experiments on the widely accepted FERET database, we obtained results which corroborated the significance of confidence measures - particularly, in online learning approaches. We could infer from our results with transductive learning that using confidence measures in online learning could yield significant boosts in the prediction accuracy, which would be very useful in critical pattern recognition applications.
Sethuraman Panchanathan, Shayok Chakraborty, Vineeth Balasubramanian, "Multiple cue integration in transductive confidence machines for head pose classification", 2012 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, vol. 00, no. , pp. 1-8, 2008, doi:10.1109/CVPRW.2008.4563070