Probabilistic Tracking in Joint Feature-Spatial Spaces

In this paper we present a probabilistic framework for tracking regions based on their appearance. We exploit the feature-spatial distribution of a region representing an object as a probabilistic constraint to track that region over time. The tracking is achieved by maximizing a similaritybased objective function over transformation space given a nonparametric representation of the joint feature-spatial distribution. Such a representation imposes a probabilistic constraint on the region feature distribution coupled with the region structure which yields an appearance tracker that is robust to small local deformations and partial occlusion. We present the approach for the general form of joint feature-spatial distributions and apply it to tracking with different types of image features including row intensity, color and image gradient.

• Type: Conference
• Year: 2003
• Where: CVPR
• Authors: Ahmed M. Elgammal, Ramani Duraiswami, Larry S. Davis
• Keywords: Computer Vision, CVPR 2003, Joint Feature-spatial Distribution, Probabilistic Constraint, Probabilistic Framework, Region Feature Distribution, Small Local Deformations