Engineering drawing material information extraction method based on template

Abstract

The invention discloses an engineering drawing material information extraction method based on a template, comprising the following steps of: generating a table figure, words and filling rule description information of table units by using figure software to generate a table extraction template; reading and identifying basic figure element type information, figure property parameter information, rule description information and topological structure information which are contained in the extraction template; analyzing the feature of the extraction template to form table feature description according to the topological structure information; circularly reading and identifying basic figure element types and figure property parameter information in a CAD (Computer Aided Design) design drawing and then identifying table frames according to table features to form table frame integrations; circularly identifying the element of each table frame integration and then reading and identifying the basic figure element types and the figure property parameter information; and extracting material information and storing the material information in a database. The invention improves the extraction precision of the table features and ensures the extracted semantic relevance and the extraction accuracy of the material information.

Description

technical field [0001] The invention relates to the technical field of extracting engineering drawing material information containing material tables, in particular to a method for extracting engineering drawing material information based on a template. Background technique [0002] As a highly refined and concentrated form of information expression, tables are the main design information carrier of engineering drawings, the basis for project cost estimation, the basis for engineering material procurement, and the basis for construction organization. Since the 1990s, the "drawing board" project promoted by our country in the field of engineering design has achieved great success, but the "drawing board" project has only realized computer graphics. In order to obtain material information from a large number of material sheets of historical electronic drawings, to perform engineering cost analysis or reuse of historical design data, designers usually have to manually check eac...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a template-based engineering drawing material information extraction method to solve the above-mentioned form recognition and information extraction methods with poor adaptability and poor versatility, which are not suitable for dynamics, significant differences, large noise, and complex layout structures. Problems of Recognition and Extraction of Bill of Materials Forms of CAD Design Drawings with Semantic Relevance

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