53
Installation
Appendix
Introduction
How to Use
Configuration
Definitions
A green bar indicates that even though motions are detected, the event will not be
triggered because the image variations are still falling under the defined threshold.
Percentage = 30%
NOTE
How does motion detection work?
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There are two parameters for setting the motion detection: Sensitivity and Percentage. In
the illustration above, frame A and frame B are two sequential images. Pixel differences
between the two frames are detected and highlighted in gray (frame C), and will be
compared with the sensitivity setting. Sensitivity is a value that expresses the sensitivity
to moving objects. Higher sensitivity settings are expected to sense a slight movement
while smaller sensitivity settings tend to neglect it. When the sensitivity is set to 70%,
the Network Camera defines the pixels in the purple areas as "alerted pixels" (frame D).
Percentage is a value that expresses the proportion of "alerted pixels" to all pixels in the
motion detection window. In this case, 50% of pixels are identified as "alerted pixels".
When the percentage is set to 30%, the motions are judged to exceed the defined
threshold; therefore, the motion window will be outlined in red.
For applications that require higher security management, it is suggested to set higher
sensitivity settings and smaller percentage values.
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