View Segmentation and View adjacencies Identification

A method is presented for segmenting mechanical engineering drawings in 2D orthographic vector data form into views using connectivity analysis and identifying the corresponding adjacent relationships between the views using rules from the draught-standard. The method is the first one that can accommodate auxiliary views including partial views in addition to the standard orthogonal set, the number of views and their layout in the drawings need not to be known a priori. The method has been successfully implemented as part of a system for feature recognition and 3D reconstruction from 2D engineering drawings.