Abstract: A RAG based method for character separation in the intelligent recognition of mechanical drawing is provided in this paper. By using this method, not only the graphic and character can be separated effectively, but the decimal point, degree mark, dash line, and short line in the center line can be kept in the graphic part as well. Furthermore, the processing method for the characters to be recognized is discussed in this paper also.

Key words: image recognition, graphic and character separation, rectangle adjacency graph