KNOWLEDGE ORGANIZATION AND INTERPRETATION PROCESS IN ENGINEERING DRAWING INTERPRETATION

Abstract

This paper describes the way knowledge is organized and used in our CELESSTIN document interpretation system, which is a blackboard-based, multi-expert prototype system for extracting functional CAD information from scanned engineering drawings. After a general overview of the way CELESSTIN is implemented, we describe in detail several of the specialists cooperating to perform the high-level drawing interpretation: extraction of symmetric entities, disassembling, kinematics analysis. 1. Introduction In the design of a complete document analysis system, a lot of attention is given to the individual components, especially the low-level image analysis procedures and the pattern recognition methods used in the interpretation process. But in the case of systems which aim at attaining high-level understanding of the document and semantical interpretation, the issue of knowledge organization and contextual reasoning becomes also crucial. This is the case in our work on the conversion of mec...