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Position detecting apparatus and method of correcting data therein

  • US 7,620,237 B2
  • Filed: 11/23/2005
  • Issued: 11/17/2009
  • Est. Priority Date: 11/30/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting a position in an actual space of an object by imaging said object with a plurality of imaging units, comprising:

  • an object extracting unit for extracting an object from images obtained by said imaging units;

    an actual space position calculating unit for calculating said position in said actual space of said object extracted by said object extracting unit;

    a corrective value calculating unit for calculating a corrective value to correct said position in said actual space calculated by said actual space position calculating unit; and

    an actual space position correcting unit for correcting said position in said actual space calculated by said actual space position calculating unit by using said corrective value calculated by said corrective value calculating unit,wherein said corrective value calculating unit images a plurality of objects arranged at predetermined positions in said actual space with said imaging units, and calculates said corrective value based on positions in images of said objects,wherein said actual space position calculating unit comprises a parallax calculating unit for calculating each of the parallaxes obtained when each of said objects is imaged by said imaging units,wherein said corrective value calculating unit calculates said corrective value based on said parallaxes of said objects arranged at predetermined positions in said actual space, andwherein said corrective value calculating unit calculates said corrective value based on a distance between said objects obtained in a direction perpendicular to a direction in which said imaging units are arranged.

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