Moving target detection method using two-frame subtraction and a two quadrant multiplier

  • US 5,150,426 A
  • Filed: 11/20/1990
  • Issued: 09/22/1992
  • Est. Priority Date: 11/20/1990
  • Status: Expired due to Term
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First Claim
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1. An apparatus for detecting a moving object in a cluttered scene comprising:

  • first means for storing data of a first representation of the cluttered scene;

    second means for storing data of a second representation of the cluttered scene;

    means for subtracting the first representation from the second representation to form a subtracted representation of the scene;

    a first spatial filter for filtering the subtracted representation;

    a second spatial filter for filtering the data in the first means for storing; and

    a two quadrant multiplier, said two quadrant multiplier receiving an output from said first spatial filter and an output from said second spatial filter to form an output substantially eliminating the background clutter and an ambiguous image of the object stored in the second means for storing,

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