Direct answer: The camera captures the plate, OCR/ANPR software decodes the characters, the database checks authorization, and the transit result is logged.
1. Vehicle detection
As the vehicle approaches the entrance, a loop detector or photocell triggers detection; the camera starts capturing images on this signal and focuses on the vehicle's plate area.
2. Plate reading
ANPR/OCR software analyzes the characters in the plate image and converts them to text; image preprocessing steps are applied to improve accuracy for dirty, angled, or nighttime captures.
3. Authorization check
The read plate is compared within milliseconds against whitelist (authorized), blacklist (banned), and guest list records to decide whether the vehicle has transit authorization.
4. Barrier command
For an authorized vehicle, an open command is sent to the barrier or gate control unit via relay, TCP/IP, or API; for an unauthorized vehicle, the barrier stays closed and an optional alarm is triggered.
5. Reporting
The transit is logged in the central database along with the plate, date, time, direction, and vehicle image. These records can be queried for entry-exit reports, occupancy tracking, or security review.
Quick technical facts
| Integration | Relay, TCP/IP, API |
|---|---|
| List management | Whitelist, blacklist, and guest |
| Reporting | Plate, date, time, direction, image |
| Operating model | Local, cloud, or hybrid |
Frequently asked questions
Can this solution work without internet access?
When a local server or edge architecture is preferred, basic transit operations can continue without internet access.
How long does installation take?
The duration is determined after a site survey, based on field infrastructure and the number of lanes.
Does it integrate with an existing barrier?
Integration is possible with many barrier systems that support relay, TCP/IP, or API connectivity.
Last updated: July 16, 2026 · Technical content: Gray Teknoloji project team
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