Detecting humans under partial occlusion using Markov logic networks

Authors:
Raghuraman Gopalan;William Schwartz
Affiliations:
University of Maryland, College Park, MD;University of Maryland, College Park, MD
Venue:
Proceedings of the 10th Performance Metrics for Intelligent Systems Workshop
Year:
2010

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Abstract

Identifying humans under partial occlusion is a challenging problem in unconstrained scene understanding. In contrast to many existing works that model human appearance in isolation, we address this problem by studying the semantic context between human face and other body parts using Markov logic networks. By learning a set of probabilistic first-order logic rules that capture interactions between body parts under varying degrees of occlusion, and the relationship they share with the neighboring spatial windows, we obtain a graphical model representation of these instances to facilitate inference. We illustrate the efficacy of our method through experiments on standard human detection datasets, and an internally collected dataset with several occluding humans.