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Systems and methods for determining if objects are in a queue

  • US 7,400,745 B2
  • Filed: 01/29/2007
  • Issued: 07/15/2008
  • Est. Priority Date: 12/01/2003
  • Status: Expired due to Term
First Claim
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1. A method, comprising:

  • detecting a first object within a defined area using a sensor, the defined area being fixed with respect to a field of detection of the sensor;

    producing a position value of the first object based on an indicator from the sensor, the position value including at least two position coordinates and a corresponding time value; and

    associating the position value of the first object with a queue set when a queue parameter condition is satisfied based on a value calculated based on at least a portion of the position value of the first object and at least a portion of a position value of a second object, the position value of the second object including at least two position coordinates and a corresponding time value, the position value of the second object being associated with the queue set, the queue set defining a queue associated with a seed location that has a fixed location within the defined area.

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