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Land mark, land mark detecting apparatus, land mark detection method and computer program of the same

  • US 20050117781A1
  • Filed: 10/12/2004
  • Published: 06/02/2005
  • Est. Priority Date: 12/01/2003
  • Status: Active Grant
First Claim
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1. A land mark comprising plural mark primitives which have rectangular shapes and are aligned in a reference line to which all of said rectangular shapes have parallel sides, wherein a first mark primitive has longer sides parallel to said reference line than a second and a third mark primitives which are placed in both sides of said first mark primitive along said reference line, respectively.

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