Intelligent Operation 21OverviewFigure 6-1indicates that the AI function is enabled. indicates that AI by device is enabled.Face Detection6.2System triggers alarms when human faces are detected within the detection zone.6.2.1 Enabling AI PlanTo use AI by camera, you need to enable AI plan first. AI plan is available on select models. To use AI by camera, you need first enable the corresponding AI plan; otherwise the AIfunction does not work. The Device automatically shows the AI functions available on the connected cameras.Click , or click on the configuration interface, and then select EVENT.Step 1The EVENT interface is displayed.Select a camera in the device tree on the left.Step 2Select AI Plan > AI Plan > AI Plan.Step 3The AI Plan interface is displayed. See Figure 6-2. The interface might vary depending on the function capabilities of cameras. Theactual interface shall prevail. When the camera is a PTZ camera, configure presets on the camera systemfirst, and then you can set AI features for each preset of the PTZ camera. SeeFigure 6-3.