Publikationen

The goal of the APOSDLE (Advanced Process-Oriented SelfDirectedLearning environment) project is to enhance knowledge worker productivityby supporting informal learning activities in the context of knowledgeworkers’ everyday work processes and within their work environments. Thiscontribution seeks to communicate the ideas behind this abstract vision to thereader by using a storyboard, scenarios and mock-ups. The project just startedin March 2006 and is funded within the European Commission’s 6th FrameworkProgram under the IST work program. APOSDLE is an Integrated Projectjointly coordinated by the Know-Center, Austria’s Competence Centre forKnowledge Management, and Joanneum Research. APOSDLE brings together12 partners from 7 European Countries.

Retrieval in current multimedia databases is usually limited to browsing and searching based on low-level visual features and explicit textual descriptors. Semantic aspects of visual information are mainly described in full text attributes or mapped onto specialized, application specific description schemes. Result lists of queries are commonly represented by textual descriptions and single key frames. This approach is valid for text documents and images, but is often insufficient to represent video content in a meaningful way. In this paper we present a multimedia retrieval framework focusing on video objects, which fully relies on the MPEG-7 standard as information base. It provides a content-based retrieval interface which uses hierarchical content-based video summaries to allow for quick viewing and browsing through search results even on bandwidth limited Web applications. Additionally semantic meaning about video content can be annotated based on domain specific ontologies, enabling a more targeted search for content. Our experiences and results with these techniques will be discussed in this paper.