TY - SER AU - Soffer, Aya AU - Samet, Hanan TI - Integrating symbolic images into a multimedia database system using classification and abstraction approaches KW - SYMBOLIC-IMAGE DATABASES KW - MULTIMEDIA DATABASES KW - RETRIEVAL BY CONTENT KW - SPATIAL DATABASES KW - IMAGE INDEXING KW - QUERY OPTIMIZATION N1 - Symbolic images are composed of a finite set of symbols that have a semantic meaning. Examples of symbolic images include maps (where the semantic meaning of the symbols is given in the legend), engineering drawings, and floor plans. Two approaches for supporting queries on symbolic-image databases that are based on image content are studied. The classification approach preprocesses all symbolic images and attaches a semantic classification and an associated certainty factor to each object that it finds in the image ER -