User's Manual

User’s Manual
121
Click
Clear
to the right of
Draw Rule
, and you can clear all drawn rules.
Step 3 Configure abandoned object parameter.
Table 5-31 Description of abandoned object parameter
Parameter
Description
Duration
For abandoned object, the duration is the shortest time to trigger
an alarm after an object is abandoned.
For other parameters, see "5.5.5.1 Tripwire".
Step 4 Click
Save
.
5.5.5.4 Missing Object
An alarm will be triggered when the selected target in the scene is taken away for the time
longer than the set duration.
The system analyzes static areas from the foreground, and determines whether it is missing
object or abandoned object from the similarity of its foreground and background. When the
time exceeds the set period, an alarm is triggered.
Applicable scenes: Scenes with sparse targets, no obvious and frequent light changes. For
scenes with intensive targets or too many obstacles, the missed alarm would increase; for
scenes in which too many people stay, the false alarm would increase. Keep the detection
area texture as possible simple as possible, because this function is not applicable to scenes
with complex texture.
Step 1 Select
Missing Object
from the
Rule Type
list.
Figure 5-94 Missing object setting