Recognizing different actions with a unique approach can be a difficult task. This paper proposes a novel holistic representation of actions that we called "action signature". This 1D trajectory is obtained by parsing the 2D image containing the orientations of the gradient calculated on the motion feature map called motion-history image. In this way, the trajectory is a sketch representation of how the object motion varies in time. A robust statistical framework based on mixtures of von Mises distributions and dynamic programming for sequence alignment are used to compare and classify actions/trajectories. The experimental results show a rather high accuracy in distinguishing quite complicated actions, such as drinking, jumping, or abandoning an object.

Action Signature: a Novel Holistic Representation for Action Recognition / Calderara, Simone; Cucchiara, Rita; Prati, Andrea. - STAMPA. - (2008), pp. 121-128. ((Intervento presentato al convegno IEEE International Conference on Advanced Video and Signal Based Surveillance tenutosi a Santa Fè (NM) nel 1-3 September 2008 [10.1109/AVSS.2008.32].

Action Signature: a Novel Holistic Representation for Action Recognition

CALDERARA, Simone;CUCCHIARA, Rita;PRATI, Andrea
2008

Abstract

Recognizing different actions with a unique approach can be a difficult task. This paper proposes a novel holistic representation of actions that we called "action signature". This 1D trajectory is obtained by parsing the 2D image containing the orientations of the gradient calculated on the motion feature map called motion-history image. In this way, the trajectory is a sketch representation of how the object motion varies in time. A robust statistical framework based on mixtures of von Mises distributions and dynamic programming for sequence alignment are used to compare and classify actions/trajectories. The experimental results show a rather high accuracy in distinguishing quite complicated actions, such as drinking, jumping, or abandoning an object.
IEEE International Conference on Advanced Video and Signal Based Surveillance
Santa Fè (NM)
1-3 September 2008
121
128
Calderara, Simone; Cucchiara, Rita; Prati, Andrea
Action Signature: a Novel Holistic Representation for Action Recognition / Calderara, Simone; Cucchiara, Rita; Prati, Andrea. - STAMPA. - (2008), pp. 121-128. ((Intervento presentato al convegno IEEE International Conference on Advanced Video and Signal Based Surveillance tenutosi a Santa Fè (NM) nel 1-3 September 2008 [10.1109/AVSS.2008.32].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/420732
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