Version: 20220705 20
Verify and adjust the view and area setup
Over time, the position of the camera may change due to mechanical wear, vibration, accidental shock, changes in
environment, etc. This has an impact on the view but also on some zones that are typically being setup at the initial
installation time, possibly affecting the detection performance and general operation.
We distinguish following areas that need to be verified and adjusted if needed:
-Field of view: this area represents the total view area of the camera optics.
-View areas: view areas can be defined that are smaller than the total field of view and are generated by
digitally zooming into that area. These areas can then be streamed separately or used for digital PTZ
operation. View areas also affect the image that is processed by the analytics.
-Focus area: for proper focusing, a zone can be assigned for which the focus is measured and set. By default,
this is the centre of the field of view but in some cases, it can be beneficial to designate a different focus
area to obtain optimal focus.
-Privacy masks: to comply with GDPR legislation, it may be required to cover certain areas in the field of view
before viewing or recording. A shift of the field of view will result in a different relative position of the privacy
masks which may indirectly lead to a GDPR infringement.
-Detection areas: in some cases, fire detection is restricted to a number of defined zones. Any change in the
field of view will result in a shift of these areas as well and affect detection.
To see what is processed by the analytics, one can either verify the detection zone setup or request an image through
cgi command “http://<ip-address>/local/FireCatcher/capture.cgi”Error! Hyperlink reference not valid.
Besides the verification of these areas, it is also recommended to fine-tune the focus of the camera as this may drift
over time. This will be part of the focus area verification procedure.
To verify the camera image and areas setup, log into the camera web interface. See Accessing the camera web
interface on how to access the web interface. You can either use an administrator account login or a viewer account
login to see the stream, but settings can only be changed with an administrator account.
To verify the field of view and view area setup, follow these steps:
1. In the camera web interface window, open the settings by clicking the “settings” button in the bottom right
of the camera webpage.
2. Click the “View area” tab in the control panel.
View areas are drawn on top of the complete field of view as yellow rectangles with resolution information. Compare
the field of view with the documented field of view in the as-built documentation and reposition the camera if needed.
If the view areas are still not the same after repositioning, the zoom may have drifted and need adjustment too. The
latter requires to open the camera and manually adjust the zoom ring. Refer to the installation manual on how to
adjust position and zoom.
After any re-adjustment, generate a new screenshot of the view area setup to update the as-built documentation. A
screenshot in Microsoft windows can easily be taken by pressing Windows key + Shift + S, select the "window snip"
icon on top of the display and click on the window you want to capture, in this case: the browser window. A screenshot
will be generated in the clipboard of Windows that can be pasted (by pressing CTRL + V keys) in the as-built
documentation.