ZURÜCK

2.3.2: Example of a Search in a Scientific Database

Information need: Retrieval systems for multimedia objects especially for images

Database INSPEC contains documents that describe articles and books:

(see fig. 1 )

Generate a query:

RETRIEVAL SYSTEMS and MULTIMEDIA and IMAGES

The (Boolean) retrieval system selects all documents that contain all the three terms. There are three hits for January to June 1995: "Image Engine: an object-oriented multimedia database for storing, retrieving and sharing medical images and text", "Multimedia information retrieval using knowledge in encyclopedia texts", "Images database management system: a 'server-client producer' system on a local network and on the Internet"

ZUGANGAbb. 1: A document from INSPEC

Different queries produce different result sets:

RETRIEVAL and MULTIMEDIA and IMAGE$
results in 35 hits including: "PhotoFile: a digital library for image retrieval", "Spatial knowledge representation and retrieval in 3 - D image databases", "Multimedia retrieval technology","A WWW interface to the OMNIS/Myriad literature retrieval engine", "Problems of content-based retrieval in image databases", It is not obvious that these documents are less adequate to the problem than those of the first query. More data are given in fig. 2 .

ZUGANGAbb. 2: Number of documents found in INSPEC with different queries for the time interval January - June 1995


ZURÜCK

© 1998 / HTML-Version 17. 11. 1998: R. Ferber