Cisco 8620, Справочное руководство

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Cisco Video Surveillance 8620/8630 IP Camera Reference Guide
Chapter 5 Configuration
Applications > DI and DO
The Percentage Indicator will rise or fall depending on the variation between sequential images. When
motions are detected by the camera and are considered to exceed the preset threshold, the red bar rises.
Meanwhile, the motion detection window will be outlined in red.
Photos or videos can be captured instantly and configured to be sent to a remote server (via an Email or
FTP server). For more information on how to configure an event setting, see the
“Event > Event settings”
section on page 5-36 .
A green bar indicates that even though motions have been detected, the event has not been triggered
because the image variations still fall under the preset threshold.
If you want to configure other motion detection settings for day/night/schedule mode (for example, for
a different lighting condition), click
Profile to open the Motion Detection Profile Settings page. Another
three motion detection windows can be configured on this page.
To set up a profile, follow these steps:
Step 1
Create a new motion detection window.
Step 2 Click the Profile mode tab.
Step 3
Select the applicable Schedule mode. Manually enter a time range.
Step 4 Click Save to enable the settings and click Close to exit the page.
This motion detection window will also be displayed on the Event Settings page. You can go to Event >
Event settings > Add Event > Trigger to select it as a trigger source. Seethe “Event > Event settings”
procedure on page 5-36 for detailed information.
How does Motion Detection Work?
There are two motion detection parameters: Sensitivity and Min. Item Size. Sensitivity is a value that
expresses the sensitivity to moving objects. A higher sensitivity setting allows camera to detect slight
movements while a lower sensitivity setting will neglect them.
The minimum item size is a threshold value that determines how many “alerted pixels” can trigger an
event. When the size of an intruding object is larger than the minimum size, and its movement persist
for 0.3 second, the motion is judged to exceed the defined threshold; and the motion window will be
outlined in red. With a large minimum item size, the size of moving object is considered as smaller than
the minimum item size, no motion alarm is triggered. With a smaller minimum item size, the same
moving object triggers the alarm.
For applications that require a high level of security management, it is suggested to use higher sensitivity
settings. However, a higher sensitivity level can also produce false alarms due to fast light changes when
switching between the day and night modes, AE switch, turning the light on or off, and so on.
Applications > DI and DO
•
Digital input—Select High or Low as the Normal status for the digital input. Connect the digital
input pin of the camera to an external device to detect the current connection status.
• Digital output—Select Open or Grounded to define the normal status for the digital output. Connect
the digital output pin of the camera to an external device to determine the current status.