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Boolean filtering method and apparatus

  • US 4,482,970 A
  • Filed: 11/06/1981
  • Issued: 11/13/1984
  • Est. Priority Date: 11/06/1981
  • Status: Expired due to Term
First Claim
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1. A method of filtering in real time space-time data consisting of a plurality of binary data frames each containing an equal number of points comprising the steps of:

  • (a) storing sequentially each of the plurality of binary data frames;

    (b) recursively determining whether the points of a sequence of M, where M is an integer, of the plurality of stored binary data frames forms at least one continuous string by logically comparing each of the stored binary data frames comprising said sequence of M with the binary data frame which preceded it and the binary data frame which followed it on a point by point basis; and

    (c) outputting the points of each of said compared binary data frames which when compared with the points in the other stored binary data frames comprising said sequence of M form a continuous string, said outputted points being filtered space-time data.

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