D-Link DCS-6111, Руководство пользователя

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55 D-Link DCS-6111 User Manual
Section 3 - Configuration
How does motion detection work?
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.
A
B D
C