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Smoke detection

  • US 20020024446A1
  • Filed: 04/20/2001
  • Published: 02/28/2002
  • Est. Priority Date: 10/20/1998
  • Status: Active Grant
First Claim
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1. A smoke detection system comprising video camera monitoring means, video frame comparison means, signal processing means, and alarm generating means dependent on an output from the signal processing means;

  • the signal processing means being arranged to analyse successive frames acquired by the video camera monitoring means and to compare the intensity and/or colour of individual pixels or group of pixels so as to consider the overall characteristics and inter-relationships of these pixels so as to detect the presence of smoke characterised in that the signal processing means analyses a plurality of different types of change in the said characteristics and inter-relationships.

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