Automatic Number Plate Recognition (or as frequently called ‘License plate recognition’) is a special form of optical character recognition (OCR). License plate recognition (LPR) is a type of technology, mainly software, that enables computer systems to read automatically the registration number (license number) of vehicles from digital pictures.
Reading automatically the registration number means transforming the pixels of the digital image into the ASCII text of the number plate.
The very key factor is the number plate recognition software. The sophistication of the recognition software, the intelligence and quality of the applied number plate recognition algorithms, the mathematical knowledge and the years of experience behind determines the capabilities of the recognition software. The better the algorithms are, the highest the quality of the recognition software is:
- the highest recognition accuracy it has,
- the fastest processing speed it has,
- the most type of number plates it can handle,
- the widest range of picture quality it can handle,
- the most tolerant against distortions of input data it is.
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