SharpOS 12.7 Portal - LPR settings page - SharpV | SharpOS 12.7

AutoVu Handbook for SharpV Fixed Installations 12.7

series
SharpV | SharpOS 12.7
revised_modified
2019-08-21

The Analytics page is available from the Configuration > LPR settings menu. Use the Analytics page to configure the analytics used for the license plates read by the SharpV.

LPR settings:
Context
Select which plate origin the SharpV is reading.
Reading mode
Select one of the following reading modes:
Continuous
Select this for plates to be captured continuously. This is the default setting.
Conditional
When this option is selected, the SharpV captures plate reads continuously as long as the selected input signal meets the condition defined (high/low). You must select an input and specify whether the state is high or low.
Continuous with virtual loop:
This option is automatically selected when you enable the virtual loop feature. With this option, a parking lot gate can still be activated for vehicles with damaged or dirty license plates which cannot be detected by the SharpV LPR camera.
Single read on trigger
Select this option so the SharpV captures a plate read after a signal is received from an electrical trigger, or after a Security Center event-to-action or hot action. This configuration is useful for controlling vehicle access to gated parking lots. You can configure the plate read capture to occur before or after the trigger is activated.
Add trigger
Select to add a trigger. You must configure the following;
  • When. Select which input receives the trigger signal and indicate the state of the input (Low or High). You can also select an External input (Security Center event to-action or hot action).
  • Capture Window.
    • Start X ms before/after trigger. The capture can occur up to X ms before or after the trigger is activated.
    • Duration X ms. The system attempts to capture a plate read for up to 30000 ms. 4000 ms is the default value.
      IMPORTANT: The capture window cannot end before the time the trigger is activated.
  • If no plates.
    • Capture image X ms after trigger. If no plate is read during the time specified in the Capture window, a "no plate" read is logged and the system captures a context image of the vehicle so the read can be manually edited.
    • Use LPR image as context image. An image from the LPR camera is used to replace the context image for the "no plate" read.
      NOTE: Information on context images is not applicable to SharpV ITS cameras.
Read strategy
Select one of the following read strategies:
Slow-moving vehicles
Select this when vehicles are traveling slowly when their license plates are captured. For example, use this for parking lot gates or toll stations.
Fast-moving vehicles
Select this when vehicles are traveling at moderate to high speeds when their license plates are captured. For example, select this option for a Sharp overlooking a highway.
Gate control
Select this when vehicles are stopped when their license plates are captured. For example, use this for a Sharp that is monitoring a gated parking lot or toll booth.
Optimize for static image background
This feature helps to decrease false positives by ignoring parked vehicles, signs, and other static objects.
IMPORTANT:
  • Not recommended if only a small part of the image background is static, for example, if many moving trees are visible. This is less likely to happen in installations where the camera is tilted downwards.
  • It is not recommended to use this feature in conjunction with Virtual Loop when vehicles are traveling at speed above 50 km/h (30 MPH).
Camera orientation
Select the pictograph that describes how the road appears from the camera's perspective. This helps the system to determine the direction that vehicles are traveling.
Read contents
Select what you would like the SharpV to attempt to read:
NOTE: You can add the state, vehicle make, and confidence score as annotation fields in Security Center to query for this information in Security Desk reports.
State
Select this option if you want the Sharp unit to attempt read the license plate origin (issuing state, province, or country).
NOTE: Plate state recognition might not be available for all states.
Vehicle make
Select this option if you want the Sharp unit to attempt to read the vehicle’s make from the brand or logo (Honda, Toyota, and so on).
Confidence score
Assigns a numerical value (from 0 to 100) to each license plate read. This value indicates how confident the SharpV is in the accuracy of the read.
Plate tilt filter
Only detect plates that are tilted within this angle range.
Character height filter
Only detect plates when the characters are within this pixel height range.