Page 80 of 97
Title FireVu Detector Standalone Installation Manual
NetVu Ltd.
No 1 Thellow Heath Park, Northwich Road, Northwich, Cheshire. CW9 6JB
Hue
–
angle around cone (by example, red is 0 degress).
Saturation
–
how far from centre of circle. What position along radius you are at (0 at centre 255
on circumference of circle).
Value
–
How far up the “cone” (i.e. how bright the colour is 0 to 255).
This allows you to either reject pixels based on a range of H, S, or V or a combination of any of the
three, or to only allow pixels based on a range of H, S or V or a combination of any of the three.
From within this web-page you can limit the number of pixels analysed by either rejecting a range
of pixels based on their Hue, Saturation or Value by setting a lower limit to reject from and an
upper limit to reject to. This will exclude pixels within that H, S or V range leaving all pixels outside
that range being analysed by the FireVu detector’s algorithm.
Alternatively, you can only accept a range of pixels based on their Hue, Saturation or Value by
setting a lower range to accept from and an upper range to select to. Pixels with an H, S of V
outside that range will be excluded from the FireVu detector’s algorithms analysis.
A screen shot of the “Frame Analysis” web
-page is shown below.
Establishing the relevant Hue Saturation or Value levels to either accept or reject can be achieved
using the “Frame Analysis” part of this web
-page.
At the top of the “Frame Analysis” web
-
page is a “Camera” selection drop
-down box. This allows
you to select the detector you wish to configure, and once selected a still image from the video
connected to that detector input will be shown within this web-page.
