Honeywell HBD2FR1, User Manual

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62 | HBD2FR1(X) User Guide
Adjusting Video Motion Detection Sensitivity
Increasing Sensitivity
If relevant scene motion does not trigger VMD alarms, do the following:
•
Decrease the Motion Threshold level (from 80% to 50%, or from 50% to 30%). This will
increase the sensitivity of the motion detection, causing smaller objects to be detected
and decrease the contrast level (amount of noise) required to trigger an alarm. This should
be the primary adjustment mechanism.
• Decrease the size of the region-of-interest box (and add more regions if needed). This will
cause smaller objects to be detected and trigger VMD alarms.
Note After VMD sensitivity is increased, observe the performance in other lighting
conditions in case further adjustments are required to prevent false alarms.
Decreasing Sensitivity
If VMD alarms are triggered even when there is no motion and no significant changes in the
video, do the following:
•
Increase the Motion Threshold level (from 30% to 50%, or from 50% to 80%). This will
decrease the sensitivity of the motion detection by increasing the contrast level (amount of
noise) required to trigger an alarm. This should be the primary adjustment mechanism.
• Increase the size of the region-of-interest box. This will prevent smaller objects (or smaller
areas of noise) from triggering VMD alarms.
Sample Video Motion Detection Configurations
The following examples are provided for illustration purposes only. Factors such as lighting
level, contrast, and image noise could affect VMD performance and require further adjustments
as described above.
Normal Field of View
In a normal field of view, with a person walking in front of the camera, the maximum
recommended region-of-interest box sizes would be as shown by the red boxes in
Figure 4-18
,
Figure 4-19
, and
Figure 4-20
.