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Method and apparatus for decomposing an image stream into units of local contrast

  • US 5,909,516 A
  • Filed: 03/28/1997
  • Issued: 06/01/1999
  • Est. Priority Date: 03/29/1996
  • Status: Expired due to Term
First Claim
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1. Apparatus for computing units of local contrast from an input sequence having a plurality of signals, said apparatus comprising:

  • a plurality of cascaded temporal filters for generating a plurality of temporal filtered signals from each of the signal of the input sequence;

    at least one subtractor, coupled to at least two of said temporal filters, for generating a temporal bandpass signal; and

    at least one divider, coupled to one of said subtractor and one of said temporal filter, for generating a temporal bandpass contrast signal.

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