ZoneMinder Forums

Here's the problem: On partially cloudy days (like today), the differences in light from clouds passing in front of the sun create a tremendous number of events. I'm wondering if anyone has any suggestions as to reasonable settings for the zone (threshold, alarmed area....) that would reduce or eliminate this.

Thanks

-strav

Hi Steve,

The simplest way to acheive the elimination of large changes in illumination is to set a maximum value for the alarmed or filtered pixels. The exact value will you will need to use depends on what falls in your field of view but maybe 50% or so would do. Another alternative if you have one or more areas that always falls into the area with a light change is to use a small preclusive zone to eliminate alarms when triggered.

Finally, you could always create a filter that deletes events that fit into the light change pattern, e.g. one or two alarms frames and a large score.

Regards,

Phil,