Multimedia database

About: Multimedia database is a research topic. Over the lifetime, 1404 publications have been published within this topic receiving 19856 citations. The topic is also known as: Multimedia database & MMDB.

3-D shape descriptors and distance metrics for content-based artifact retrieval

Abstract: The growing number of large multimedia collections has led to an increased interest in content-based retrieval research. Applications of content-based techniques to image retrieval is an active research area but much less work has been reported on content-based retrieval of 3-D objects in a multimedia database context. Increasingly such objects are being captured and added to multimedia collections and the European project, SCULPTEUR, is developing a museum information system which includes the introduction of facilities for content-based retrieval of the 3-D representations. This paper provides a comparison and evaluation of a range of 3-D shape descriptors and distance metrics which have been introduced into the SCULPTEUR project to demonstrate their use for content-based retrieval applications. Results show that while particular descriptors and distance metrics provide good overall performance, it can be more appropriate to choose different descriptors for different search tasks.

Multimedia retrieval system and method

Abstract: The invention relates to computer-based data retrieval technology. Aiming at the disadvantages that the prior searching technology displays an excessively single searching means and can not output various natural language and speech expression forms of a keyword, the invention provides a multimedia retrieval system which comprises an input end and an output end; the system also comprises an identifier and a multimedia database; by receiving a multimedia keyword through the input end, the identifier searches an index entry corresponding to the multimedia keyword and emits a retrieval instruction containing the index entry; and the multimedia database receives the retrieval instruction, searches and outputs a multimedia record containing the index entry through the output end. The invention also provides a multimedia retrieval method. A multimedia input and output conversion system is implemented and has the following advantages: a multimedia keyword mode can enrich the searching means; and multi-language expression helps to break through foreign language bottleneck.

Views of media objects in multimedia databases

Abstract: Multimedia database systems must manage large amounts of graphical, textual, and audio data. To compound the problem, if a multimedia designer creates a new media image from an existing item, current systems store the new object as an independent image. This space is wasted since the data already exists in the system. In order to eliminate this wasted space, views of stored objects should be used instead of replicated data. Views are well known in relational databases to have both benefits and drawbacks. In order to overcome these drawbacks, the paper defines a view schema, which mirrors the media hierarchy; a view dag which determines the base files used to create the view; and view independence, a paradigm for performing operations on views. The criteria for a canonical media algebra are outlined. A canonical media algebra allows multiple editors to instantiate a view. Finally, optimization of specifications is discussed.

On Efficient Query Processing with the Earth Mover's Distance

Abstract: The Earth Mover's Distance which is proposed in computer vision as a distance-based similarity model has been widely used and investigated in various domains for similarity search. Although there exists the opportunity to apply this well-known similarity model reflecting the human perceptual similarity both on feature histograms and signatures as feature representation techniques, efficiency improvement approaches towards the Earth Mover's Distance were often investigated on feature histograms. Thus, it can be brought into question how k-nearest-neighbor queries can be processed efficiently by using this distance-based similarity model in a database of feature signatures, such as in a multimedia database. In this paper, the work in progress is presented regarding the new lower bound Independent Minimization for Signatures (IM-Sig) to the Earth Mover's Distance on feature signatures as an efficient filter approximation approach. Furthermore, the problems and challenging issues regarding efficient query processing on feature signatures are presented. The ongoing experimental evaluation on real data points out the high efficiency of the proposed lower bound, contributing to a promising start in the research field of efficient query processing with the Earth Mover's Distance.

Fuzzy Signatures for Multimedia Databases

Abstract: In this paper we suggest a new method of information retrieval based on signature files which uses fuzzy sets and fuzzy logic for signature construction and manipulation. We provide the definition of fuzzy signatures and we discuss their possible applications.