all in one license plate recognition machine < / a > principle of license plate recognition

The principle of license plate recognition in one machine is to recognize the license plate number by taking the vehicle image on the road through the camera. The process involves: vehicle detection - image acquisition - preprocessing - license plate location - character segmentation - character recognition - result output

　　1. Buried coil detection, infrared detection, radar detection technology, video detection and other methods can be used to sense the passing of the vehicle and trigger image acquisition and capture

　　2. After image preprocessing, row and column scanning is performed on the gray image to determine the license plate area. After locating the license plate area in the image, the character area can be accurately located through graying, binarization and other processing

　　3. Character segmentation is carried out according to the character size characteristics. The segmented characters are scaled and extracted, and matched with the standard character expression in the character database template

　　4. Output the result of license plate recognition in text format. It can recognize license plates including English letters, digital elements and Chinese characters, including ordinary license plates and military and police license plates