VIVOTEK Vivotek Automobile Electronics vc8201 사용자 설명서

 

 

► 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 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 a high level of security management, it is suggested to use 

higher 

sensitivity settings and 

smaller percentage values.