Version: 20220329
13
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With default settings, the FireCatcher Camera algorithm will trigger alarm when smoke covers
approximately 3 % of the field of view during 5 seconds at the same location in the field of view.
•
With default settings, the FireCatcher Camera algorithm will trigger alarm when the flame size
exceeds 0,04% of the field of view and the flame is detected for at least 20 seconds at the same
location in the field of view.
For a camera with 1920 x 1080 resolution, 3 % is a zone of 249 x 249 pixels and 0,04% is a zone of 28 x 28 pixels.
As a result: the smaller the field of view, the higher the sensitivity; and the further away from the camera, the lower
the sensitivity.
The minimum required coverage for smoke to be detected depends on the
“
smoke
alarm minimum coverage”
setting.
The minimum required size for a flame to be detected
depends on the “minimum flame size” setting
. Refer to the
FireCatcher Camera user manual for more information on configuring the detection sensitivity.
Below is a graphical representation of smoke and flame detection threshold for some common coverage settings on
a 1920 x 1080 image, assuming a 1:2 aspect ratio of smoke clouds.
Also consider the environmental requirements described above when positioning the camera. In large areas, you may
consider providing redundant coverage by adjacent cameras.
