Integration von digital Bildern in verteilte Hypermedia-Systeme

Verfasser: Pichler, Peter

Sachtitel: Integration von digital Bildern in verteilte Hypermedia-Systeme

Abstract

This thesis discusses the storage and retrieval of still real-world images in digital form and their presentation to the user of a modern computer-based hypermedia system. It introduces some formats and algorithms to compress and file digitized images, and debates ways to realize an appropriate user interface in a state-of-the-art window and network-oriented computing environment. To define this thesis' context, general topics on hypertext and hypermedia systems are argued, and as a special example the architecture and features of the second generation hypermedia system Hyper-G and its Unix/X11 client Harmony are explained. Finally, the implementation of the Harmony Image Viewer is described. It fully integrates JPEG, GIF, TIFF, PNM andPACK digital images into the hypermedia structure of Hyper-G, allowing links from and to image documents. Rectangular, circular and ellipsoid areas as well as polygons can be defined either as source or destination of a hyperlink. Special features to deal with, for example, the often problematic slowness of (many) Internet connections, include Live Display, Progress Indication, Autofit, and Delayed Scroll.

Betreuer
Maurer, Hermann; Kappe, Frank