• Preselection engine: the frame used by the Preselection stage. Select Manual frame to draw a user
defined frame.
The Preselection stage will use:
• Full Frame: the entire frame
• Manual Frame: the frame drawn by the user
• Motdet Frame: the frame returned by motion detection
• Trigger (vehdet) Frame: the frame returned by other trigger sources, such as vehicle detection
or Virtual Loop
• ANPR engine: the frame used by the ANPR stage
The ANPR stage will use:
o None: The ANPR stage will be skipped
o Same as Preselection: the same frame will be used as in the previous stage (Full,
Manual, Motdet or Trigger)
o LP frame: the license plate frame as returned by the previous stage
• Create LP images: Create a cropped image containing the license plate only
• Create image strip: All triggered images are minified and joined to form an index image, which
may help to set up trigger timing.
Filtering results can be configured with the following two options:
• Event filter:
o Return all events: create a record in the database based on all trigger signals, even if a
license plate was not found
o Return events with license plate: Create a record in the database only if a license plate
was found
o Return events with license plate and type: Create a record in the database only if both
a license plate was found and its nationality was determined.
• Duplicate timeout: the time frame in which the same license plate will not be registered again
if once read.
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