Local Basic Operations 149
Figure 4-130
4.7.2.4 IVS (General Behavior Analytics)
The IVS function processes and analyzes the images to extract the key information to match
with the specified rules. When the detected behaviors match with the rules, the system activates
alarms.
This function is for some series product only.
IVS function and human face detection function cannot be valid at the same time.
The IVS function environment shall meet the following requirements:
The object total size shall not be more than 10% of the whole video.
The object size on the video shall not be more than 10pixels*10 pixels. The abandoned
object size shall be more than 15pixels*15 pixels (CIF resolution). The object width shall not
be more than 1/3 of the video height and width. The recommended height is 10% of the
video.
The object and the background brightness different shall be more than 10 grey levels.
The object shall remain on the video for more than 2 seconds. The moving distance is larger
than its own width and shall not be smaller than 15pixels (CIF resolution).
The surveillance environment shall not be too complicated. The IVS function is not suitable
for the environment of too many objects or the changing light.
The surveillance environment shall not contain glasses, reflection light from the ground, and
water. Free of tree branches, shadow, mosquito and bugs. Do not use the IVS function in
the backlight environment, avoid direct sunlight.
Step 1 Select Main Menu > AI > PARAMETERS > IVS.
The IVS interface is displayed. See Figure 4-131.
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