Determine what caused alarm

[Thomas007]

I have Monitors with multiple zones. When I get an alarm, I sometimes wonder what caused the alarm - which zone, and which part of the image.
How do I see that?

From what is stated in the userguide, it seems that Blobs are shown with the configured color, but I don't use blobs (yet), as I want to use blobs as a last resort, because of the additional processing overhead. So I use AlarmedPixels instead.


BR Thomas

[PacoLM]

Hi Thomas,

With OPTIONS::CONFIG::CREATE_ANALYSIS_IMAGES you have the option to get a visible way to know which caused the event and where.
http://zoneminder.readthedocs.io/en/sta ... onfig.html

Hope it helps!
PacoLM

[Thomas007]

Hi Paco.

That options is already checked.

When studying the frames marked as alarm frames, all I see is one thin red line, as a box, around the entire frame (captured image). So I cannot see which of the zones caused the motion detection.

BR Thomas

[PacoLM]

It should only make the shape of the changed area, you may need to play with the settings.

[snake]

One option which is not related to zones but will help you to 'determine what caused alarm' is if you use ZMTrigger. You can specify the source of zmtrigger in its packet (see /usr/bin/zmtrigger.pl on debian). This means you could have multiple hardware devices; let's say a PIR, a laser diode sensor, and maybe a reed switch on a window. Each would be watching different areas. When you send the packets from these devices, there is a spot to specify the source. So it would be possible then to specify "Front hallway Laser" or "PIR" or "Window Reed" on each device. Yes they can all point to the same monitor ID (camera).

[knight-of-ni]

Hi Paco.

That options is already checked.

When studying the frames marked as alarm frames, all I see is one thin red line, as a box, around the entire frame (captured image). So I cannot see which of the zones caused the motion detection.

BR Thomas

That means blob detection is not turned on under the motion settings for the camera.

[rockedge]

When you send the packets from these devices, there is a spot to specify the source. So it would be possible then to specify "Front hallway Laser" or "PIR" or "Window Reed" on each device. Yes they can all point to the same monitor ID (camera).

by adding a "%Q" to the end of the Timestamp like this example :%N - %d/%m/%y %H:%M:%S %Q this will display a cause or source sent by the string going to zmTrigger.pl on the stream view.

Code: Select all

$monitor|on = 1;
$extTriggerx = "$monitor|on+120|255|motion sensor|FrontDoor|motion sensor";