Automatic Generation of MPEG-7 Compliant XML Document for Motion Trajectory Descriptor in Sports Video

Authors:
Haoran Yi;Deepu Rajan;Liang-Tien Chia
Affiliations:
Center for Multimedia and Network Technology, School of Computer Engineering, Nanyang Technological University, Singapore 639798;Center for Multimedia and Network Technology, School of Computer Engineering, Nanyang Technological University, Singapore 639798;Center for Multimedia and Network Technology, School of Computer Engineering, Nanyang Technological University, Singapore 639798
Venue:
Multimedia Tools and Applications
Year:
2005

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Abstract

The MPEG-7 standard is a step towards standardizing the description of multimedia content so that quick and efficient identification of relevant content can be facilitated, together with efficient management of information. The description definition language (DDL) is a schema language to represent valid MPEG-7 descriptors and description schemes. MPEG-7 instances are XML documents that conform to a particular MPEG-7 schema, as expressed in the DDL and that describe audiovisual content. In this paper, we pick one of the visual descriptors related to motion in a video sequence, viz., motion trajectory. It describes the displacements of objects in time, where an object is defined as a spatiotemporal region or set of spatiotemporal regions. We present a method of automatically extracting trajectories from video sequences and generating an XML document that conforms to the MPEG-7 schema. We use sports videos in particular, because the trajectories are very random and the robustness of our algorithm can be demonstrated.