Figure 7 - uploaded by Iraklis Varlamis
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User interface of the annotation tool.
Source publication
A system for digitization, storage and retrieval of audiovisual information and its associated data (metainfo) is presented. The principles of the evolving MPEG-7 standard have been adopted for the creation the data model used by the system, permitting efficient separation of database design, content description, business logic and presentation of...
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... application takes as input an XML description of the audiovisual content and gives as output the same description enriched by the annotator. The basic features of the annotation application, shown in Figure 7, are the following: ÿÿ Automatic shot and keyframe detection ÿÿ Tree representation of the video segments (AV entity/Theme/ShotGroup/Shot/Keyframe, sum- marization and physical storage) ÿÿ Usage of the MPEG-1 format for the annotation ÿÿ Customizable annotation of each video segment ÿÿ Automatic extraction of several low-level features, such as camera motion, moving re- gions, faces and text Following the "Whatever is known and needed is included in the description", the annotator is free to choose the depth in which he decides to annotate. For example, he might annotate only the full AV entity, or annotate part or all the shots. ...
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Citations
... Finally, the same archiving software as the one used by two of the already participating archives can be modified and customized for any interested archive. This system comes with valuable supporting software, as is the powerful annotator tool presented in Fig. 8 [1], [11], [14]. ...
In the last few years, numerous multimedia archives have made extensive use of digitized storage and annotation technologies. Still, the development of single points of access, providing common and uniform access to their data, despite the efforts and accomplishments of standardization organizations, has remained an open issue as it involves the integration of various large-scale heterogeneous and heterolingual systems. This paper describes a mediator system that achieves architectural integration through an extended three-tier architecture and content integration through semantic modeling. The described system has successfully integrated five multimedia archives, quite different in nature and content from each other, while also providing easy and scalable inclusion of more archives in the future.
... MPEG-7, the new format for video metainformation is developed to describe such information and certain efforts have been made to create an XML equivalent of it. [3] A schema describes the structure of an XML document. It indicates which elements appear in the document and which subelements , attributes, and relations are allowed within each element. ...
Many organizations and enterprises establish distributed working environments, where different users need to exchange information based on a common model. XML is widely used to facilitate this information exchange. The extensibility of XML allows the creation of generic models that integrate data from different sources. For these tasks, several applications are used to import and export information in XML format from the data repositories. In order to support this process for relational repositories we developed the X-Database system. The base of this system is an XML-Schema file that describes the logical model of interchanged information. Initially, the system analyses the syntax of the XML-Schema file and generates the relational database. Then it handles the decomposition of valid XML files according to that Schema and the composition of XML documents from the information in the database. Finally the system offers a flexible mechanism for modifying and querying database contents using only valid XML documents, which are validated over the XMLSchema file's rules.
In this paper we present a review of recent research and development works, which have been developed in the domain of indexing
and mining audio-visual document. We first present the characteristics of the audio-visual documents and the outcomes of digitising
this kind of documents. It raises several important issues concerning the new definition of what is a document, what is indexing
and what are the numeric principles and technologies available for performing indexing and mining tasks. The analysis of these
issue let us introduce the notion of temporal and multimedia objects, and the presentation of the three steps for indexing
multimedia documents. It includes the clear distinction between descriptors and indexing. Finally we introduce the MPEG-7
paradigm, which sets the technical environment for developing indexing applications; Then we shortly review current developments,
based on the text mining, the XML-Schema, and the event description interface approaches.
We present in this paper MP7QL, a powerful query language that we are developing for querying MPEG-7 descriptions, and a user preference model that allows for expressing preferences about every aspect of an MPEG-7 multimedia content description. The MP7QL queries may utilize the user preferences as context, thus allowing for personalized multimedia content retrieval. The user preference model supports multimedia Filtering and Search Preferences (FASP) that allow for expressing semantic preferences, preferences regarding the low-level visual features and preferences regarding media-related aspects (creation, classification, source etc). The proposed FASPs essentially are MP7QL queries, allow for the systematic integration of domain knowledge in the semantic preferences of the users and have the standard MPEG-7 FASPs as a special case. The MP7QL and the FASP model have been expressed using both XML Schema and OWL syntax. An implementation on top of an XML Repository is currently under way.
The digitization and annotation of audiovisual programs results in a huge amount of information that becomes useful only if it is properly organized and if the appropriate query mechanisms exist. Usually audiovisual information and meta-information is stored in relational database schemata that consist of decades of tables, relationships and constraints that complicate the information querying tasks. The PANORAMA* platform has been developed to cover needs for manipulating video information, by attaching meta-information for both audio and visual content of video sources. This paper presents this meta-information model and the database interface developed in terms of the PANORAMA platform. The model works as keystone in the creation of the database and the database interface implements a mechanism for converting XML documents to relational data. This mechanism allows information users to use a more understandable way to communicate with the database.
