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Method and apparatus for detecting innovations in a scene

  • US 4,931,868 A
  • Filed: 05/31/1988
  • Issued: 06/05/1990
  • Est. Priority Date: 05/31/1988
  • Status: Expired due to Fees
First Claim
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1. A method for detecting innovations in a scene comprising an array of pixels, the method comprising the steps of:

  • generating at each of a multitude of times, a set of input signals representing the amount of light incident on a group of adjacent pixels, each set of input signals forming an n by one vector, where n equals the number of signals in the set, the sets of input signals being represented by Zk, where k=1, 2, 3, . . . , m, and m equals the number of said input sets;

    conducting the sets of input signals to a processing network;

    the processing network transforming each set of input signals to a respective one set of output signals, the sets of output signals being represented by β

    k, wherein Zk and Zk satisfy the relation Zk =Dβ

    k +ek , where D is an at least four by an at least three matrix, and ek represents noise in the set of signals Zk ;

    conducting the sets of output signals to a detection means; and

    the detection means,(i) sensing the magnitude of at least one signal of each set of output signals, and(ii) generating a detection signal to indicate a change in the scene when said one signal rises above a respective one preset level.

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