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Christopher R. Wren
Researcher at Google
Publications - 79
Citations - 8386
Christopher R. Wren is an academic researcher from Google. The author has contributed to research in topics: Wireless sensor network & Pixel. The author has an hindex of 26, co-authored 79 publications receiving 8264 citations. Previous affiliations of Christopher R. Wren include Mitsubishi Electric & Massachusetts Institute of Technology.
Papers
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Journal ArticleDOI
Pfinder: real-time tracking of the human body
TL;DR: Pfinder is a real-time system for tracking people and interpreting their behavior that uses a multiclass statistical model of color and shape to obtain a 2D representation of head and hands in a wide range of viewing conditions.
Proceedings ArticleDOI
Pfinder: real-time tracking of the human body
TL;DR: Pfinder uses a multi-class statistical model of color and shape to obtain a 2-D representation of head and hands in a wide range of viewing conditions, useful for applications such as wireless interfaces, video databases, and low-bandwidth coding.
Patent
Methods of establishing a communications link using perceptual sensing of a user's presence
TL;DR: In this article, a method of establishing a communications link uses automatic sensing of a computer user's presence and activity state to record user attributes in a form accessible to other computers in a communications network.
Book ChapterDOI
Toward scalable activity recognition for sensor networks
TL;DR: In this article, the authors proposed a hierarchical framework that splits computation into localized, distributed tasks to support scalability and privacy-preserving action recognition using passive infrared (PIR) motion detectors.
Proceedings ArticleDOI
Dynamic models of human motion
TL;DR: This paper describes experiments in human motion understanding, defined here as estimation of the physical state of the body combined with interpretation of that part of the motion that cannot be predicted by the plant alone (the Behavior).