Automatic Number Plate Recognition (ANPR) is one of the most mature AI camera applications, deployed across Saudi Arabia's fuel stations, parking facilities, gated communities, industrial sites, and government vehicle access points. Understanding the technology helps operators configure systems for maximum accuracy.
How ANPR Works
ANPR works in two stages: plate localization and character recognition. The localization stage uses object detection to identify the plate region. The character recognition stage uses OCR to read each character. For GCC markets, this requires models trained on both Arabic and Latin character sets, as Saudi plates contain Arabic numerals and Arabic text.
Accuracy Factors and Optimization
ANPR accuracy is primarily determined by camera placement and image quality. Optimal placement positions the camera at 10–25 degrees from horizontal facing vehicle approach, with the plate filling at least 15% of the image frame. Infrared illumination is essential for nighttime operation. In Saudi Arabia, cameras with wide dynamic range (WDR) sensors deliver significantly better performance under intense sunlight.
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