A multipurpose drawing understanding system with flexibleobject-oriented framework

摘要

An object-oriented drawing understanding system named OO-Mudams,which can flexibly adapt to various types of drawings by defining theirmodel, is proposed. OO-Mudams is a model-driven system, with reasoningengine, management of internal database for reasoning results, and modeldefinition for users. By defining the models, the system can becustomized to process various kinds of drawings including engineeringdrawings and layout drawings. In order to manage huge reasoning resultspace effectively, the system uses an efficient multidimensional datastructure named BD-tree, and, to facilitate the reasoning process, theTMS (truth maintenance system) is used to maintain the dependency amongreasoning results. OO-Mudams is characterized by its flexibleobject-oriented system structure and an object-oriented language fordefining the model of target objects