User Guide

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How does motion detection work?

There are two motion detection parameters: 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 detect slight movements while smaller sensitivity

settings will neglect them. When the sensitivity is set to 70%, the Network Camera denes

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 identied 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 a high level of security management, it is suggested to use

higher sensitivity settings and smaller percentage values.

B D

NOTE