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Author(s): Cristina Ribeiro
Gabriel David
Title: A metadata model for multimedia databases
Issue Date: 2001
Abstract: Largely due to the facilities provided by the technology, there is currently a large effort put into the organization of large electronic repositories of documents, covering both present-day materials and those of historic interest. It is also technologically feasible to gather heterogeneous documents, and the same collection may include text, images, video and audio items, either independently or as multimedia objects. Professional and lay users have great expectations on the possibilities of searching such materials, partly due to the success of search engines on the Web. Content-based retrieval on multimedia objects is a hard task, however, and results similar to those obtained with text retrieval are not foreseeable in the near future for images or video. Retrieval of multimedia objects must therefore rely on the wealth of associated information, available as metadata of diverse nature. The paper describes a metadata model where contextual information, in an archival perspective, is combined with the description of contents, as required for content-based search. Contextual information can be valuable for search, and is important when communicating search results, where issues such as date, access rights or age rating may condition the usage of retrieved documents. The metadata model adopts a flexible multi-level approach to both context and content description, to allow for different granularities in the description of materials. It may be impracticable to provide descriptions at the individual item level in the digitization of an historic photo archive. Instead, a top-down approach to the description of collections can be a good compromise. For the video materials of a broadcast station, on the other hand, there is automatically produced information for each recorded shot that can be also accommodated in the model.
Source: Proceedings of ICHIM01: International Cultural Heritage Informatics Meeting- Cultural Heritage and Technologies in the Third Millennium
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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