On-Net Surveillance Systems, Inc.
NetDVMS 6.5f User Manual
Input, Events & Output
50
Motion detection sensitivity is therefore a key element in your NetDVMS surveillance solution, and
time spent on finding the best possible motion detection settings for each camera may help you later
avoid unnecessary alerts, etc.
Depending on the physical location of the camera, it may be a very good idea to test motion detection
settings under different physical conditions (day/night, windy/calm weather, etc.).
The Adjust Motion Detection window
Access: You access the Adjust Motion Detection window by clicking the Motion Detection... button
in the
Camera Settings for [Device Name] [Camera Name] window
.
Note: Before you configure motion detection sensitivity for a camera, it is highly recommended that
you have configured the camera's image quality settings, such as resolution, compression, etc., in the
Configure Device window
, and that you have specified any areas to be excluded from motion detection
(for example if the camera covers an area where a tree is swaying in the wind or where cars regularly
pass by in the background) in the
Define Exclusion Regions window
. If you later change image quality
settings and/or exclusion area settings, you should always test motion detection sensitivity settings
afterwards.
The Adjust Motion Detection window features two sliders; one for setting Noise Sensitivity and one for
setting Motion Sensitivity:
Noise Sensitivity
Noise is insignificant changes in individual pixels which should not be regarded as motion.
The Noise Sensitivity slider determines how much each pixel must change before it is regarded
as motion. Insignificant changes, which should not be regarded as motion, are considered
acceptable noise, hence the name of the slider.
With a high noise sensitivity, very little change in a pixel is required before it is regarded as
motion.
Areas in which motion is detected are highlighted in the preview image. Select a slider position
in which only detections you consider motion are highlighted.
As an alternative to using the slider, you may specify a value between 0 and 256 in the field
next to the slider to control the noise sensitivity setting.
Tip: If you find the concept of noise sensitivity difficult to grasp, try dragging the slider to
the left towards the High position: The more you drag the slider towards the High position, the
