Modèles paramétriques de mouvement pour la description des contenus vidéos dans le cadre du futur standard MPEG-7 Parametric Motion Models for Video Content Description within the MPEG-7 Framework

This paper addresses the issue of motion-based description of video contents within the framework of the future MPEG7 standard. A family of velocity-based similarity measures (VSM) is first defined, involving a generic distance function which can be specified according to the query type. VSM computation complexity, spatio-temporal alignment problems and translational and homogenous motion component weighting are the main issues addressed and solved in this paper. Experimental results, carried out on the MPEG-7 data test sets, objectively establish that the optimized VSM proposed here largely outperforms the classic parameterspace-based similarity measures.