NDLI: Nonlinear Generative Models for Dynamic Shape and Dynamic Appearance

Content Provider	IEEE Xplore Digital Library
Author	Elgammal, A.
Copyright Year	2004
Description	Author affiliation: Rutgers University, Piscataway, NJ (Elgammal, A.)
Abstract	Our objective is to learn representations for the shape and the appearance of moving (dynamic) objects that supports tasks such as synthesis, pose recovery, reconstruction and tracking. In this paper we introduce a framework that aim to learn a landmark-free correspondence-free global representations of dynamic appearance manifolds. We use nonlinear dimensionality reduction to achieve an embedding of the global deformation manifold that preserves the geometric structure of the manifold. Given such embedding, a nonlinear mapping is learned from the embedding space into the visual input space. Therefore, any visual input is represented by a linear combination of nonlinear bases functions centered along the manifold in the embedding space. We also show how approximate solution for the inverse mapping can be obtained in a closed form which facilitate recovery of the intrinsic body configuration. We use the framework to learn the gait manifold as an example of a dynamic shape manifold, as well as to learn the manifolds for some simple gestures and facial expressions as examples of dynamic appearance manifolds.
Starting Page	182
Ending Page	182
File Size	676965
Page Count	1
File Format	PDF
DOI	10.1109/CVPR.2004.407
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Legged locomotion Computer science Tensile stress Shape Face recognition Humans Lighting Object recognition Image reconstruction Principal component analysis
Content Type	Text
Resource Type	Article

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