Editing license plate reads in a parking zone

• This information applies to systems that use AutoVu™ Free-Flow. If you are not using this feature, see Editing license plate reads.
• If the camera fails to capture a plate, no LPR image is associated with the read and the plate number NOPLATE is associated with the read. This ensures that all objects that pass through the camera's field of view are captured for review, thereby helping to maintain higher vehicle occupancy count accuracy in the parking zone. This is particularly useful in installations where there is a high chance of missed plate reads, for example, in muddy or snowy weather conditions.

  

• You cannot edit a plate read if the read is protected or if the read generated a hit.
• When a plate read is edited, if there is a confidence score associated with the plate read, the confidence score is changed to 100%.
• The details of the plate read edit appear in the Activity trails report.
• If the system generates too many NOPLATE reads (one car generates multiple NOPLATE reads, or a vehicle is detected but does not appear in the image) or too few NOPLATE reads (vehicles that pass the camera are not detected), it may indicate that there is a problem with the installation, for example, partial obstruction, bad lighting, bad positioning, or configuration issues. You might also need to recalibrate the Sharp camera's virtual loop feature. For more information refer to the Sharp Administration Guide.
• You can edit plate reads from the following tasks:
  • Reads task
  • Monitoring task
  • Parking sessions task (not including NOPLATE reads)
  • Parking zone activities task (not including NOPLATE reads)
  • Alarm monitioring task (if alarms are configured for NOPLATE reads or reads with a low confidence score)

How editing plate reads affects parking sessions and parking zone occupancy

• Editing an entry plate read:
  • If you edit the entry plate read for a vehicle that has an active parking session, the parking session is updated with the correct plate number. In this case, the parking zone's occupancy is not affected. If the system uses Pay-by-Plate Sync parking permits, the parking session's paid time, violation, or grace period state is reevaluated with Pay-by-Plate Sync.
  • If a vehicle's plate is misread when it enters the parking zone, a parking session is created and the parking zone's occupancy is increased. In this case, you must edit the entry plate read before the vehicle leaves the parking zone or before the parking session exceeds the maximum session time because at this point, the session is closed and editing the plate read does not update the parking session. However, this situation does not affect occupancy. When the vehicle's license plate is read correctly at the parking zone exit, the vehicle will be flagged as an unknown vehicle and the parking zone's occupancy is reduced.
  • If the entry read is a NOPLATE read, the vehicle is included in the occupancy of the parking zone, but a parking session is not created. Editing the read creates a parking session for the vehicle and the permit is evaluated based on the entry time of the vehicle.
• Editing an exit plate read:
  • If you edit an exit plate read that matches the plate number of an active parking session, the system closes the session and the parking zone's occupancy is updated accordingly.
  • When a NOPLATE read is generated at the exit of a parking zone, the occupancy count for that zone is reduced. If that event is edited to a plate number that matches that of an active session in the parking zone, then the parking session is closed because we know that NOPLATE read is the same vehicle.