SEGMENTATION AND RECOGNITION OF DIMENSION TEXTS IN ENGINEERING DRAWINGS
Gao Jingb · Chinese Journal of Computers · 1997
A method based on connected area detection is developed to segment and recognize dimension texts in engineering drawings. The paper first builds a hierarchical representation of drawing image based on connected area and sub connected area. Then it uses size criteria to find out character candidates from all connected areas and uses collinear criteria to group separate character candidates into text strings. Finally,it analyzes text strings according to text patterns summarized from dimension texts and gives out the recognition result.