A Comparison Framework for Walking Performances using aSpaces
Villanueva Pipaón, Juan José (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Gonzàlez, Jordi (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Varona, Javier (Universitat de les Illes Balears. Departament de Ciències Matemàtiques i Informàtica)
Roca i Marvà, Francesc Xavier (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Gonzàlez, Jordi

Date:	2005
Abstract:	In this paper, we address the analysis of human actions by comparing different performances of the same action executed by different actors. Specifically, we present a comparison procedure applied to the walking action, but the scheme can be applied to other different actions, such as bending, running, etc. To achieve fair comparison results, we define a novel human body model based on joint angles, which maximizes the differences between human postures and, moreover, reflects the anatomical structure of human beings. Subsequently, a human action space, called aSpace, is built in order to represent each performance (i. e. , each predefined sequence of postures) as a parametric manifold. The final human action representation is called p-action, which is based on the most characteristic human body postures found during several walking performances. These postures are found automatically by means of a predefined distance function, and they are called key-frames. By using key-frames, we synchronize any performance with respect to the p- action. Furthermore, by considering an arc length parameterization, independence from the speed at which performances are played is attained. As a result, the style of human walking can be successfully analysed by establishing the differences of the joints between a male and a female walkers.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Model de moviment humà ; Model de cos humà ; Sincronització ; Fotograma clau ; Modelo de movimiento humano ; Modelo de cuerpo humano ; Sincronización ; Fotograma clave ; Human Motion Modeling ; Human Body Modeling ; Synchronization ; Key-frames
Published in:	ELCVIA : Electronic Letters on Computer Vision and Image Analysis, V. 5 n. 3 (2005) p. 105-116, ISSN 1577-5097

Adreça original: https://elcvia.cvc.uab.es/article/view/v5-n3-gonzalez-varona-roca-et-al
Adreça alternativa: https://raco.cat/index.php/ELCVIA/article/view/31626
DOI: 10.5565/rev/elcvia.110

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