Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
Reasoning and revision in hybrid representation systems
Reasoning and revision in hybrid representation systems
Attributive concept descriptions with complements
Artificial Intelligence
Subsumption between queries to object-oriented databases
Information Systems - Special issue on extending database technology
Selected papers of the 9th annual ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
A constraint-based approach to shape management in multimedia databases
Multimedia Systems
Visual information retrieval
Shape representation for image retrieval
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 2)
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Description Logics in Data Management
IEEE Transactions on Knowledge and Data Engineering
A Knowledge-Based Approach for Retrieving Images by Content
IEEE Transactions on Knowledge and Data Engineering
The Terminological Image Retrieval Model
ICIAP '97 Proceedings of the 9th International Conference on Image Analysis and Processing-Volume II
Hauptvortrag: Quantifier elimination for real closed fields by cylindrical algebraic decomposition
Proceedings of the 2nd GI Conference on Automata Theory and Formal Languages
Linear Constraint Query Languages: Expressive Power and Complexity
LCC '94 Selected Papers from the International Workshop on Logical and Computational Complexity
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We propose an approach based on description logics for the representation and retrieval of visual information. We first consider objects as having shapes which are described by means of semi-algebraic sets.1 We propose a model which consists of three layers: (1) {\sf Shape Layer}, which provides the geometric shapes of image objects; (2) {\sf Object Layer}, intended to contain objects of interest and their description; and (3) {\sf Schema Layer}, which contains the structured abstractions of objects, i.e., a general schema about the classes of objects represented in the {\sf Object Layer}. We propose two abstract languages on the basis of description logics: one for describing knowledge of the object and schema layers, and the other, more expressive, for making queries. Queries can refer to the form dimension (i.e., information of the {\sf Shape Layer}) or to the semantic dimension (i.e., information of the {\sf Object Layer}). We show how this framework can be easily extended to accommodate the visual layer (e.g., color and texture).