Licence Plate Recognition Systems
A system that identifies and records vehicles by their licence plates and controls the barrier.
A licence plate recognition system (LPR) reads the plates of vehicles in entrance and exit lanes and compares them against registered lists. The barrier opens automatically for an authorised vehicle; an unrecognised vehicle is reported to security staff, and every passage is logged with its time. Narstek manages the lane survey, camera positioning, barrier and software integration, and commissioning as a single project.
Lane Survey and Camera Positioning
Read performance depends primarily on the camera angle, distance and vehicle speed in the lane. For each lane, the vehicle stopping point, camera height and angle, night-time lighting and the effect of oncoming headlights are assessed on site.
LPR/ANPR Camera and Recording Infrastructure
Cameras suitable for licence plate recognition are selected, with infrared illumination and varifocal lenses where required. Recognition can be performed by the camera itself or by the recorder/software; the choice depends on the number of lanes and the existing camera system.
Barrier, Door and Access Control Integration
A camera or software relay output is connected to the barrier, automatic door or turnstile controller. Whitelist, blacklist, visitor and time-limited permission settings are configured; manual opening and passage procedures in the event of a fault are agreed together.
Recording, Reporting and Maintenance
Passages are stored with the licence plate, time, lane and image, and can be searched by date or plate. Lens cleaning, angle checks, monitoring of the read rate and software updates are covered as part of periodic maintenance.
What determines the read rate?
The success of licence plate recognition depends more on installation geometry than camera resolution: the size of the plate in the image, the angle between the camera and vehicle, the vehicle’s slowing or stopping point, and whether infrared illumination at night captures the plate without overexposing it. Camera positioning and lane layout are therefore confirmed during the site survey; a speed bump or stopping line may be recommended if necessary.
About Licence Plate Recognition Systems
Can a licence plate recognition system be installed using existing cameras?
If general-purpose security cameras do not have a suitable angle and lighting for licence plate recognition, the read rate will be low. Existing cameras and the recorder are assessed; if suitable, recognition can be handled by software. Otherwise, dedicated LPR cameras are added only for the relevant lanes.
What happens to the barrier if a plate cannot be read?
If a vehicle is unrecognised or its plate cannot be read, an image is sent to security staff, who can open the barrier manually or via the software. This scenario is agreed with the operator before installation.
Are licence plate records considered personal data?
Yes. Licence plates and vehicle images are personal data under KVKK No. 6698. Visible information notices must be provided at the entrance, a retention period must be defined, and access to records must be restricted to authorised personnel.
Is it suitable for residential complexes and apartment entrances?
Yes. Residents’ vehicles can be added to a whitelist, and time-limited permissions can be set for visitor vehicles. Management can update the list through the software.
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