Multi-level Weighting in Multimedia Retrieval Systems
نویسندگان
چکیده
Ranking of relevant objects plays an important role in various applications especially in multimedia database systems and information retrieval systems. In contrast to traditional database systems, multimedia database systems deal with similarity queries returning a list of objects ranked by the objects’ overall score. The overall score for objects in the database is calculated using a scoring rule which is commonly based on similarity functions and fuzzy logic. One aspect which enhances the user’s flexibility to formulate preferences regarding the search criteria, is to assign weights to each argument in a query. In this paper a formal specification of the requirements for an adequate weighted scoring rule is given. Based on this specification different methods for incorporating weights into scoring rules are evaluated and their limitations are shown. Furthermore, we discuss that weighting on different levels in complex queries is necessary. Therefore, multi-level weighting is introduced and different possibilities to assign weights on different levels are shown. Finally, an extended specification for weighted scoring rules with multi-level weighting is proposed.
منابع مشابه
Image Retrieval Using Dynamic Weighting of Compressed High Level Features Framework with LER Matrix
In this article, a fabulous method for database retrieval is proposed. The multi-resolution modified wavelet transform for each of image is computed and the standard deviation and average are utilized as the textural features. Then, the proposed modified bit-based color histogram and edge detectors were utilized to define the high level features. A feedback-based dynamic weighting of shap...
متن کاملRF*IPF: A Weighting Scheme for Multimedia Information Retrieval
Region-based approach has become a popular research trend in the field of multimedia database retrieval. In this paper, we present the Region Frequency and Inverse Picture Frequency (RF*IPF) weighting, a measure developed to unify region-based multimedia retrieval systems with textbased information retrieval systems. The weighting measure gives the highest weight to regions that occur often in ...
متن کاملMulti-Modal Retrieval for Multimedia Digital Libraries: Issues, Architecture, and Mechanisms
Supporting effective and efficient retrieval of multimedia data is a challenging problem in building a digital library. In this paper, we examine the issues related to accommodating multi-modal retrieval of multimedia data (text, image, video and audio), and propose 2M2Net as a generic framework for such versatile retrieval in multimedia digital libraries. The retrieval is conducted based on th...
متن کاملUnified Contents Retrieval from an Academic Repository
Many forms of multimedia materials are currently stored in computer systems. In many cases, many of these materials are related to each other. Therefore, it is important to provide a unified presentation view of the related multimedia materials, which can be seen as virtual unified contents. To retrieve the most appropriate object from the unified contents, which satisfies given conditions, it ...
متن کاملReducing Retrieval Time in Automated Storage and Retrieval System with a Gravitational Conveyor Based on Multi-Agent Systems
The main objective of this study is to reduce the retrieval time of a list of products by choosing the best combination of storage and retrieval rules at any time. This is why we start by implementing some storage rules in an Automated Storage/Retrieval System (Automated Storage and Retrieval System: AS/RS) fitted with a gravity conveyor while some of these rules are dedicated to storage and ot...
متن کامل