What is license plate recognition technology and license plate recognition technology works

Principle is through the camera to shoot images of vehicles traveling on the road for the recognition of license plate numbers, the process involves: vehicle detection - image acquisition - preprocessing - license plate positioning - character segmentation - character recognition

Vehicle detection: Buried coil detection, infrared detection, radar detection technology, video detection and other ways to sense the passage of the vehicle, and trigger image capture capture.

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

Preprocessing: Noise filtering, automatic white balance, automatic exposure, and gamma correction, edge enhancement, contrast adjustment, and so on.

License plate positioning: scanning rows and columns on the grayscale image after image preprocessing to determine the license plate area.

Character segmentation: after locating the license plate region in the image, accurately locate the character region through grayscaling, binary processing, etc., and then perform character segmentation according to the character size characteristics.

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

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

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