Figure B-3 Sensitivity Level Comparison: Normal Field Of View; Figure B-4 Sensitivity Level Comparison: Wide Field Of View - Honeywell MAXPRO NVR Hybrid XE Installation And Configuration Manual

Decreasi ng VMD Sensi tivity
VMD Confi gur ati on Examples
MAXPRO NVR 5.6 Installation and Configuration Guide
If VMD alarms are triggered even when there is no motion and no significant changes in the
video, try the following adjustments to decrease VMD sensitivity.
• Increase the sensitivity level from 30% to 50%, or from 50% to 80%. This primary
adjustment mechanism increases the required contrast level (or amount of
noise) required to trigger an alarm. Higher sensitivity levels also require larger
amounts of motion to be observed before a VMD alarm is triggered.
• Increase the size of the region-of-interest box. This adjustment prevents smaller
objects (or smaller areas of noise) from triggering VMD alarms.
The sensitivity level examples below are provided only for illustration. Other factors such as
lighting level, contrast, and image noise may affect VMD performance and may require further
tuning 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 B-3.
Figure B-3 Sensitivity Level Comparison: Normal Field of View
Wide Field of View
In a wide field of view camera, the car shown below
a VMD alarm if the VMD region-of-interest box is not larger than indicated by the red box.
Figure B-4 Sensitivity Level Comparison: Wide Field of View
Combination Field of View
For cameras with a wide-angle field of view covering a large outdoor scene, people who walk
far away from the camera might appear rather small in the image. If motion needs to be
detected in the entire field of view, the following region-of-interest box configuration is
recommended.
• Three smaller boxes, set to 30% sensitivity, covering the upper portion of the
image where people appear small.
• Two larger boxes, set to 50% sensitivity, covering the lower portion of the image
where objects appear larger.
VMD Settings and Motion-based Recording Configuration
(Figure
A P P E N D I X B
B-4)would be expected to trigger
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