Wolfgang L. J. Kowarschick

Learn More
With the success of the World-Wide Web new solutions for very fast document access have emerged. ELEKTRA is an article delivery system that supports full-text and relational information retrieval as well as electronic article ordering and delivery. Full-length articles can be both viewed by standard-web browsers and printed by PostScript printers in a high(More)
We describe and compare three probabilistic ways to perform Content Based Image Retrieval (CBIR) in compressed domain using images in JPEG2000 format. Our main focus are arbitrary non-uniformly textured color images, as can be found, e.g., in home user image collections. JPEG2000 offers data that can be easily transferred into features for image retrieval.(More)
The success of the World Wide Web is boosting the development of multimedia database systems and their integration into the internet. For the documents stored and exchanged in the Web there are many multimedia data formats di ering in aspects such as resolution, sampling rate, and compression. Furthermore there is a large variety of Web browsers, the data(More)
Object-oriented databases integrated into a C++ software engineering environment promise an appealing platform for managing complex data and engineering tasks. In competitive markets like CAD for civil engineering and architecture stringent reliability and performance criteria must be met before entering into commercial products. We present a benchmark(More)
Hypermedia retrieval in combination with querying is a very powerful document access metaphor for digital library systems. Conventional distributed hypermedia systems, however, suffer from some well-known problems that make effective, goal-directed document retrieval and maintenance impossible. On the one hand, relationships between documents are modeled on(More)
The novel information retrieval system OMNIS is supported by the fulltext database system Myriad, and provides archiving, disclosing, and searching functions at drastically reduced costs. The user interface of OMNIS has been created in an intuitive way and compared with the Dexter Hypertext Reference Model, two main differences will be noticed: On the one(More)
For many object-oriented database applications taxonomies with a setinclusion semantics among the type extents are essential. In practical cases, however, common object-oriented modeling techniques often do not result in taxonomies as they ignore application specific constraints. We will elaborate that especially in domains like CAD or similar engineering(More)