@incollection{Fuhr:00b,
	address = {Boston, Dordrecht, London},
	title = {Information retrieval methods for multimedia objects},
	abstract = {We describe five major concepts that are essential for
multimedia retrieval: uncertain inference addresses
vagueness of queries and imprecision of content
representations. Predicate logic allows for dealing
with spatial and temporal relationships. The document
structure has to be considered in order to retrieve the
most relevant part of a document in response to a
query. Whereas fact retrieval employs an open world
assumption, content-based retrieval should be based on
an open world assumption. In order to perform
inferences based on the content of multimedia objects,
inconsistencies have to be dealt with. Based on these
concepts, we present DOLORES, a logic-based multimedia
retrieval system with a multilayered architecture.
Below the top-level presentation layer, the semantic
layer uses a conceptual model for structured documents
which is transformed into a probabilistic
object-oriented logic (POOL) supporting aggregated
objects, different kinds of propositions (terms,
classifications and attributes) and even rules as being
contained in objects. This four-valued logic is
translated into probabilistic Datalog which is
interpreted by the HySpirit inference engine.
Multimedia objects are stored either in a relational
database management system or an information retrieval
engine.},
	booktitle = {State-of-the-art in {Content}-{Based} {Image} and {Video} {Retrieval}},
	publisher = {Kluwer Academic Publishers},
	author = {Fuhr, Norbert},
	editor = {Veltkamp, Remco C and Burkhardt, Hans and Kriegel, Hans-Peter},
	year = {2001},
	pages = {191--212},
}

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