What should I do to improve car counting accuracy when using LPR (License Plate Recognition)?
Question
What should I do to improve car counting accuracy when using LPR (License Plate Recognition)?
Answer
To improve the accuracy of vehicle license plate detection and recognition, as well as vehicle make and model identification, follow the installation, calibration, and configuration recommendations from the Intelligent Video Analytics Pro Application Note.pdf, Chapter 3.
Key factors to consider:
Camera positioning:
Height
Distance
Angle
Tilt Angle
Other factors:
Number of lanes
Field of view
LPR Scene Mode
Exposure
Calibration and Configuration
Keep in mind that after modifying or adjusting the installation position or camera settings, you must reset the calibration of the LPR in the web browser of the camera view or in the Configuration Manager.
To reset the calibration via the web browser:
Open the web browser view of the device.
Click Configuration > Alarm > LPR.
Click Reset Calibration.
To reset the calibration via the Configuration Manager:
Start Configuration Manager.
In the View area, click the VCA tab.
Select License Plate Recognition tab.
Click Reset Calibration.
After making any adjustments, always verify performance by testing under real traffic conditions.
Accurate vehicle counting with LPR depends on correct installation, precise calibration, and proper configuration.
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