Location mark detecting method for robot cleaner and robot cleaner using the method

  • US 20040156541A1
  • Filed: 05/15/2003
  • Published: 08/12/2004
  • Est. Priority Date: 02/07/2003
  • Status: Active Grant
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First Claim
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1. A location mark detecting method used by a robot cleaner, which includes an upwardly-looking camera capturing an area on which location marks are disposed, a control unit recognizing a current location based on an image captured by the camera and reference location marks stored in a storage, and a driving unit being driven in accordance with a signal of the control unit, in the location mark detecting method the control unit detecting the location marks from the image, the method comprising the steps of:

  • obtaining from the image object marks to be compared with the stored reference location marks;

    determining whether the shapes of the object marks are identical to those of the stored reference location marks;

    determining whether the distance between the object marks is identical to the distance between the reference location marks if it is determined that the shapes are identical;

    determining whether a surrounding image of the object marks is identical to that of the reference location marks if it is determined that the distances are identical; and

    identifying the object marks as the location marks if it is determined that the surrounding images are identical.

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