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Interactive Recognition of Graphic Objects in Engineering Drawings

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Graphics Recognition. Recent Advances and Perspectives (GREC 2003)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 3088))

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Abstract

In this paper, an interactive approach to recognition of graphic objects in engineering drawings is proposed. Interactively, the user provides an example of one type of graphic object by selecting it in an engineering drawing, and then the system learns its graphical knowledge and uses this learnt knowledge to recognize or search for other similar graphic objects. For improving the recognition accuracy of the system, we also propose a user feedback scheme based on multiple examples from both positive and negative aspects. We summarized four types of geometric constraints to represent the generic graphical knowledge of graphic objects. We also developed two algorithms for case-based graphical knowledge acquisition and knowledge-based graphics recognition, respectively. For the user feedback scheme, we adjust our original knowledge representation by associating a few types of tolerances to every piece of graphical knowledge and use different tolerances for recognizing different graphical objects. Experiments have shown that our proposed framework is both efficient and effective for recognizing various types of graphic objects in engineering drawings.

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References

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Author information

Authors and Affiliations

  1. Department of Computer Science, City University of Hong Kong, 83, Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong SAR, China

    Yan Luo & Wenyin Liu

Authors
  1. Yan Luo
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  2. Wenyin Liu
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Editor information

Editors and Affiliations

  1. Computer Vision Center, Universitat Autònoma de Barcelona, Bellaterra, 08193, (Barcelona), Spain

    Josep Lladós

  2. Departmen Computer Science and Engineering, Chung-Ang University, 221 Heuksukdong, Dongjakku, Seoul, Korea

    Young-Bin Kwon

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© 2004 Springer-Verlag Berlin Heidelberg

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Luo, Y., Liu, W. (2004). Interactive Recognition of Graphic Objects in Engineering Drawings. In: Lladós, J., Kwon, YB. (eds) Graphics Recognition. Recent Advances and Perspectives. GREC 2003. Lecture Notes in Computer Science, vol 3088. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-25977-0_12

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  • DOI: https://doi.org/10.1007/978-3-540-25977-0_12

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-22478-5

  • Online ISBN: 978-3-540-25977-0

  • eBook Packages: Springer Book Archive

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