License plate recognition camera recognition principle?

Its principle is to identify the license plate number by shooting the vehicle image on the road with a camera. The process involves vehicle detection, image acquisition, preprocessing, license plate location, character segmentation, character recognition and result output.

Vehicle detection: We can use buried coil detection, infrared detection, radar detection technology, video detection and other ways to sense the passing of vehicles and trigger image capture.

Image acquisition: Real-time and uninterrupted recording and acquisition of passing vehicles through the high-definition camera capture host.

Pretreatment: noise filtering, automatic white balance, automatic exposure, gamma correction, edge enhancement, contrast adjustment, etc.

License plate location: scan the gray image after image preprocessing to determine the license plate area.

Character segmentation: after locating the license plate area in the image, accurately locate the character area through graying and binarization, and then segment the characters according to the character size characteristics.

Character recognition: the segmented characters are scaled and extracted, and matched with the standard character expressions in the character database template.

Result output: the result of license plate recognition is output in text format.

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