A Learning System to Restore Operations of Isolated Line Segments in 2D Drawings

Abstract

Presently solid modeling is essential for CAD and its applications. However, most of small companies still use 2D CAD systems mainly, and ordinarily solid models are made manually from 2D drawings because they are usually incorrect in geometry and simplified. If 2D drawings are correct, solid models would be automatically generated by existing systems. The authors have attempted to develop methods to automatically restore incorrect 2D drawings into correct 2D drawings, and repetitive features in partial omissions were already automatically restored. In this paper, a method is proposed that isolated line segments made by the partial omissions can be restored by using learning systems. In this method, various patterns of isolated line segments can be learned and be automatically restored.

Keywords:

• 2D drawing
• partial omission
• learning
• restoration
• isolated line segment