Wuhan University Journal of Natural Sciences

, Volume 2, Issue 4, pp 435–438 | Cite as

Recognition of partially occluded objects based on segmentation by median filtering of extended direction code

  • Wang Yanping
  • Larmagnac Jean-Pierre
  • Yuan Jie
  • Zhao Hengzhuo


The image contour is segmented into lines, arcs and smooth curves by median filtering of extended direction code. Based on this segmentation, a set of new local invariant features are proposed to recognize partially occluded objects, which is more reasonable compared with conventional corner features. The matching results of some typical examples shows that these features are robust, effective in recognition.

Key words

pattern recognition Freeman's code extended code median filtering corner 


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Copyright information

© Springer 1997

Authors and Affiliations

  • Wang Yanping
    • 1
  • Larmagnac Jean-Pierre
    • 2
  • Yuan Jie
    • 1
  • Zhao Hengzhuo
    • 1
  1. 1.College of Electronic InformationWuhan UniversityWuhanChina
  2. 2.Dept. Appl. PhysicsI. U. T.Saint-Etinenne Cedex 2France

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