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| Number | Title | Issue Date |
| 7002478 | Smoke and flame detection A method of operating a computer for smoke and flame detection comprising the steps of: receiving digitised images of the region to be monitored; comparing pixels of one of said images with pixels of another said image according to two predetermined procedures to pr... | 02/21/2006 |
| 6956485 | Fire detection algorithm A method and apparatus for the detection of flame by entering (S1) a video signal into an algorithm which processes individual pixels in (S2) a frequency band is determined and used as a filter (S3) applies a threshold to create a map of signifi... | 10/18/2005 |
| 6844818 | Smoke detection A smoke detection system comprising video camera monitoring means, video frame comparison means, signal processing means, and alarm generating means dependant on an output from the signal processing means; the signal processing means being arranged to analyse succes... | 01/18/2005 |
