Configuring the area for object detection scenarios - KiwiVision™ 4.7.1 | Security Center 5.11.2.0

You can define the areas from which you want detected changes to trigger events.

1. From the Config Tool home page, open the Video task.
2. From the area view, select a camera that you applied an analytics scenario to.
3. Click Video analytics > Security monitoring, and then click the scenario you want to configure.
4. Click the Areas tab.
   
5. Define the area as required:
   1. Click and drag the area to move it to the location you want.
   2. Click and drag the white dots to adjust the shape and size of the area.
   3. (Optional) Add or remove areas.
      • Add areas ()
      • Remove the selected area or the selected point ()
        NOTE: When an area or point is selected, it is yellow.
6. In the Area name field, rename the selected area.
7. In the Detection section, configure the following settings:

   Foreground detection tolerance

   The sensitivity of change detection. If set too high, differences from the background you want detected might not get detected. If set too low, the slightest changes are detected and might cause false alerts.

   Min. foreground per block

   The portion of a block that must differ from the learned background enough for the block to be considered foreground.

   Detection time

   The duration that a block must be detected as foreground to be considered active. The Detection time countdown begins when the specified Stationary object time period ends. This setting is used to minimize false alerts caused by rapid changes in a block, such as moving shadows.

   When Show detection grid is enabled, Detection time is represented by the bottom of the blocks where an object is detected turning red.

   Activity cooldown

   The duration that a block remains active after it is no longer detected as foreground.

   When Show detection grid is enabled, Activity cooldown is represented by the blocks outlined in grey. The bottom of the blocks turn red.

8. In the Object size section, configure the following settings:

   Min. blocks per object

   The minimum number of active blocks required for an alert to be triggered.

   Max. blocks per object

   The maximum number of active blocks required for an alert to be triggered.

   Detect all active blocks

   When this option is selected, active blocks anywhere in the defined area can trigger alerts.

   Detect only connected blocks

   When this option is selected, only active blocks that are adjacent to each other can trigger alerts. This option minimizes false alerts caused by scattered movement, such as camera noise.

9. Click Apply.