摘要： 提出一种数据网格环境下的多媒体资源检索方法。通过设计分层结构的虚拟资源空间管理非结构化异构资源，当网格查询节点收到检索请求时，根据虚拟集和元数据等信息进行信息过滤，得到候选集及相应的结构化特征和语义标注，执行节点对候选集进行相似度求精和排序运算，并将排序结果返回查询节点。仿真结果表明，该方法具有较好的时间性能和较高的查准率。

关键词: 数据网格, 多媒体检索, 虚拟资源空间, 相似度

Abstract: This paper proposes a multimedia resource retrieval method under data grid environment. It designs a layered virtual resource space to manage multimedia data which are not structuralized and heterogeneous. When the system receive query request from a query node, the filtration process is triggered based on virtual sets and metadata. After the filtration candidate set is selected and only corresponding features and labeling information are transferred to the executing nodes in a package mode. The executing nodes are responsible for similarity computing and ranking. Final retrieval results are transferred from data node to the query node according to the ranking results. Simulation results show that this method is effective both on accuracy and time.

Key words: data grid, multimedia retrieval, virtual resource space, similarity

中图分类号: 

• TP393.02