You can configure the grid of a scene so that changes in the scene can be properly
detected and analyzed.
What you should know
- Object detection and Stopped vehicle detection scenarios only use perspective
grids.
- Custom Object Detector scenarios can use fixed grids or perspective
grids.
Fixed grids are used for top-down scenes, where there is no
horizon, for example, the top view of a parking lot.
NOTE: Depending on which scenario type you are configuring, some
settings might be unavailable or hidden if Advanced mode
is
disabled.
Procedure
-
From the Config
Tool home page,
open the Video task.
-
From the area view, select a camera that you applied an analytics scenario
to.
-
Click , and then click the scenario you want to configure.
-
Click the Grid tab.
-
For a perspective grid, use one object in the video as a size reference to
configure the near and far objects:
-
When the reference object is placed near to the camera, click and drag
the Near object over the reference object in the
video.
-
Adjust the height of the Near object to match
the height of the reference object by clicking and dragging the white
dot on the Near object.
-
Repeat the previous two steps using the Far
object when the same reference object is placed far from
the camera.
-
For a fixed grid, adjust the height of the Object to
match the height of a reference object by clicking and dragging the white dot on
the Object.
-
In the Grid section, configure the following
settings:
NOTE: Changing the block size affects the size of the blocks displayed when you
enable the Show detection grid option in the area
configuration.
- Block size
- The size of analysis units relative to the specified object or
person size in the image. If you set a low value, the required computing power
increases, but the distinction between different object sizes in the image is more
accurate.
- Min. block size
- The minimum size of analysis units relative to the height or
width of the video, depending on which measurement is shorter.
-
Click Apply.
