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Landmark search apparatus, electronic apparatus and imaging apparatus having the same, and landmark search method

  • US 8,356,049 B2
  • Filed: 02/24/2011
  • Issued: 01/15/2013
  • Est. Priority Date: 02/26/2010
  • Status: Expired due to Fees
First Claim
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1. A landmark search apparatus for retrieving landmarks around an object, comprising:

  • a position obtaining unit configured to obtain a current position of the object;

    a first storage unit configured to store landmark information including a name of a landmark and position information of the landmark related to the name;

    an retrieving unit configured to configured to retrieve the landmark information from the first storage unit based on the obtained current position;

    a second storage unit configured to store the retrieved landmark information as retrieved landmark information; and

    a determining unit configured to determine whether the retrieved landmark information is valid based on;

    i) the current position of the object;

    ii) a previous position of the object at a time of storing the retrieved landmark information in the second storage unit;

    iii) a first distance between the previous position and a farthest landmark from the previous position in landmarks indicated by the landmark information stored in the second storage unit; and

    iv) a second distance between the previous position and a landmark which is N-th farthest from the previous position in the landmarks indicated by the landmark information stored in the second storage unit, N being a predetermined number,wherein the determining unit determines whether a moving distance of the object from the previous position to the current position is more than a half of the first distance minus the second distance to determine whether the retrieved landmark information is valid.

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