M. Grundmann, F. Meier, and I. Essa (2008) “3D Shape Context and Distance Transform for Action Recognition”, In Proceedings of International Conference on Pattern Recognition (ICPR) 2008, Tampa, FL. [Project Page | DOI | PDF] ABSTRACT We propose the use of 3D (2D+time) Shape Context to recognize the spatial and temporal details inherent in human […]
Rogers, W. A., Essa, I., & Fisk, A. D. (2007). “Designing a technology coach”. Ergonomics in Design. A Publication of the Human Factors and Ergonomics Society (PDF) FEATURE AT A GLANCE: Technology in the home environment has the potential to support older adults in a variety of ways. We took an interdisciplinary approach (human factors/ergonomics […]
R. Hamid, S. Maddi, A. Bobick, I. Essa (2007). Structure from Statistics – Unsupervised Activity Analysis using Suffix Trees, At the International Conference on Computer Vision 2007. October 2007, Rio de Janeiro, BRAZIL [PDF][DOI] Abstract Models of activity structure for unconstrained environments are generally not available a priori. Recent representational approaches to this end are limited by […]
R. Hamid, S. Maddi, A. Bobick, I. Essa. “Unsupervised Analysis of Activity Sequences Using Event Motifs”, In proceedings of 4th ACM International Workshop on Video Surveillance and Sensor Networks (in conjunction with ACM Multimedia 2006). Abstract We present an unsupervised framework to discover characterizations of everyday human activities, and demonstrate how such representations can be […]
Yifan Shi, Bobick, A. Essa, I. (2006), “Learning Temporal Sequence Model from Partially Labeled Data” Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2006 Volume: 2, page(s): 1631 – 1638, ISSN: 1063-6919, ISBN: 0-7695-2597-0, Digital Object Identifier: 10.1109/CVPR.2006.174 [IEEEXplore] Abstract Graphical models are often used to represent and recognize activities. Purely […]
Huang, Y and Essa, I. (2005) “Tracking multiple objects through occlusions”, In Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2005 (CVPR 2005), Volume: 2 page(s): 1051 – 1058 vol. 2, ISSN: 1063-6919, ISBN: 0-7695-2372-2, INSPEC Accession Number:8633324 DOI: 10.1109/CVPR.2005.350, [IEEEXplore#] 20-25 June 2005 ABSTRACT We present an approach for tracking […]
Irfan Essa (2004), “Temporal Reasoning from Video to Temporal Synthesis of Video” Talk at USC’s IRIS-Vision Seminars (Fall 2004). Temporal Reasoning from Video to Temporal Synthesis of Video Abstract In this talk, I will present some ongoing work on extracting spatio-temporal cues from video for both synthesis of novel video sequences, and recognition of complex […]
Yifan Shi, Yan Huang, Minnen, D., Bobick, A., Essa, I. (2004), “Propagation networks for recognition of partially ordered sequential action” In Proceedings of the 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2004 (CVPR 2004). Volume: 2, page(s): II-862 – II-869 Vol.2, ISSN: 1063-6919, ISBN: 0-7695-2158-4, INSPEC Accession Number:8161557, Digital Object Identifier: […]