Imprecision and User Preferences in Multimedia Queries: A Generic Algebraic Approach

摘要: Specification and efficient processing of similarity queries on multimedia databases have recently attracted several research efforts, even if most them considered specific aspects, such as indexing, this new exciting scenario. In paper we try to remedy by presenting an integrated algebraic framework which allows many relevant aspects query be dealt with. As a starting point, assume the more general case where "imprecision" is already present at data level, typically because ambiguous nature objects' content. We then define generic algebra, SAMEW, semantics operators deliberately left unspecified in order better adapt scenarios. A basic feature SAMEW that it user preferences, expressed form weights, specified so alter default behavior operators. Finally, discuss some issues related "approximation" "user evaluation" results.