NETAVIS Observer 4.6 User Manual (October 2015)
Page 158 of 204
direction other than the usual one will be detected as a wrong way driver and an event will be
generated.
If the typical traffic direction changes temporarily, e.g. because of construction work, the
detector can be reset: Select the Wrong Way Detection definition, right-click on it, and select
Reset traffic direction learning
.
Please note
: The Wrong Way Detection region should always include road parts where the
typical traffic direction is observable. For example, if the scenario is to detect drivers traveling the
wrong way on the emergency lane it is not a good practice to draw the detection region tightly
around the emergency lane. Rather the solution is to extend the detection region to include the
lane next to the emergency lane, so the detector can compare a vehicle’s route to the direction
learned on the adjacent lane.
Hint
: It is possible to set up more than one Wrong Way Detection per camera, e.g. to generate different
events for vehicles going the wrong way on the main road or an exit lane.
15.3.14 Defining Number Plate Recognition
NETAVIS Observer 4.6 introduced iCAT Number Plate Recognition that can detect number plates for
use in vehicle entry, parking, and free flow scenarios.
Note
: iCAT Number Plate Recognition is a separate module which needs to be enabled with an
appropriate license key and - depending on the specific configuration - a USB hardware dongle.
The basic steps for setting up Number Plate Recognition in Observer are:
1.
Configure an iCAT Number Plate Recognition definition (which is covered in this section).
2.
(Optional) Configure the desired NPR lists (please see
18 NPR List Management
on page 175 for
more details).
3.
(Optional) Configure desired actions for number plates included or excluded in NPR lists (please
see Using Rule Administration for more details).
Note
: iCAT Number Plate Recognition is a separate module which needs to be enabled with an
appropriate license key and - depending on the specific configuration - a USB hardware dongle.
Here are the steps for configuring iCAT Number Plate Recognition:
1.
Choose
Video analysis (iCAT)
from the
System administration
menu. This opens the
Video
analysis (iCAT)
dialog.
2.
Select a camera in the camera tree and in the menu select
Add new definition
.
3.
In the
Type
pop-up menu choose
Number Plate Recognition
which exposes the configuration
settings.
4.
In the
Identifier
text field enter a name for this iCAT Number Plate Recognition definition.
5.
Draw the region where the number plates appear in the preview pane. Just click with the mouse
to define the corners of the polygon and close it by crossing an existing edge or by double
clicking with the mouse:
