This Article 
 Bibliographic References 
 Add to: 
Detection of Dimension Sets in Engineering Drawings
August 1994 (vol. 16 no. 8)
pp. 848-855

This correspondence presents a system for detecting dimension sets in engineering drawings that are drawn to ANSI drafting standards. A new rule-based text/graphics separation algorithm and a model-based procedure for detecting arrowheads in any orientation have been developed. Arrowhead tracking and search methods are used to extract leaders, tails, and witness lines from segmented images containing only graphics. Text blocks and feature control frames extracted from the segmented images are than associated with their corresponding leaders to obtain complete dimension sets. Experimental results are presented.

[1] R. Kasturi and L. O'Gorman, Eds.,Machine Vision Applications, vol. 5, no. 3 (special issue on Document Image Analysis Techniques), Summer 1992.
[2] ANSI Y14.5, "Dimensioning and tolerancing," and ANSI Y14.2M, "Line conventions and lettering,"Am. Soc. Mech. Eng., New York, 1982.
[3] D. Dori, "A syntactic/geometric approach to recognition of dimensions in engineering machine drawings,"Comput. Vision Graphics Image Processing, vol. 47, pp. 271-292, 1989.
[4] M. A. Wesley and G. Markowski, "Fleshing out projections,"IBM J. Res. Develop. 25, pp. 934-953, 1981.
[5] D. B. Lysak and R. Kasturi, "Interpretation of engineering drawings of polyhedral and nonpolyhedral objects,"Proc. First Int. Conf. Doc. Anal. and Recognit., Saint-Malo, France, pp. 79-87, 1991.
[6] L. O'Gorman, "An analysis of feature detectability from curvature estimation," inProc. CVPR, Ann Arbor, MI, June 1988, pp. 235- 240.
[7] C. H. Teh and R.T. Chin, "On the detection of dominant points on digital curves,"IEEE Trans. Pattern Anal. Machine Intell., vol. 11, pp. 859-872, 1989.
[8] R. Kasturi, S.T. Bow, W. El-Masri, J. Shah, J. Gattiker, and U. Mokate, "A system for interpretation of line drawings,"IEEE Trans. Pattern Anal. Machine Intell., vol. 12, pp. 978-992, 1990.
[9] L. A. Fletcher and R. Kasturi, "A robust algorithm for text string separation from mixed text/graphics images,"IEEE Trans. Pattern Anal. Machine Intell., vol. 10, pp. 910-918, 1988.
[10] F. M. Wahl, M.K.Y. Wong, and R.G. Casey, "Block segmentation and text extraction in mixed text/image documents,"Comput. Vision, Graphics, Image Processing, vol. 20, pp. 375-390, 1982.
[11] D. Antoine, S. Collin, and K. Tombre, "Analysis of technical document: The REDRAW system," inStructured Document Image Analysis. New York: Spring-Verlag, 1992, pp. 385-402.
[12] D. Dori and J. Dowell, "Detection of arrows in engineering drawings: A self-supervised approach to pattern recognition,"Machine Vision and Applicat. on Doc. Image Anal. Syst., vol. 6, pp. 69-82, 1993.
[13] J. F. Harris, J. Kittler, B. Llewllyn, and G. Preston, "A modular system for interpreting binary pixel representation of line-structured data," inPattern Recognition: Theory and Applications. Boston, MA: D. Reidel Publishing, 1982, pp. 311-351.

Index Terms:
document image processing; image segmentation; image recognition; engineering computing; dimension sets; engineering drawings; ANSI drafting standards; rule-based text/graphics separation algorithm; model-based procedure; arrowhead tracking; search methods; leaders; tails; segmented images; text blocks; feature control frames
C.P. Lai, R. Katsuri, "Detection of Dimension Sets in Engineering Drawings," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 16, no. 8, pp. 848-855, Aug. 1994, doi:10.1109/34.308483
Usage of this product signifies your acceptance of the Terms of Use.