How to Locate a Car Using License Plate Recognition?
2 Answers
Using a license plate recognition system can accurately determine the location of a vehicle. Through technologies such as license plate extraction, image preprocessing, feature extraction, and license plate character recognition, information such as the vehicle's plate number and color can be identified. Below is relevant information about license plate localization: 1. Classification of License Plate Localization: Feature-based statistical license plate localization is divided into coarse localization and precise localization. Coarse localization involves identifying regions containing license plates from edge-detected images and extracting them. By leveraging the continuous features of horizontal integral projection in the license plate region, the upper and lower edges of the license plate are determined. Utilizing the dominant characteristic of white dots in the license plate area, a rectangle of a certain width scans from left to right, and the position with the most white dots within the rectangle is identified as the approximate location of the license plate region. Precise localization, on the other hand, determines the exact license plate region based on the proportion of pixels of license plate colors (blue, white, yellow, black) in the candidate region. 2. License Plate Arrangement Rules: Apart from the current personalized license plates, the current 92-style motor vehicle license plates consist of a Chinese and English issuing authority code followed by a five-digit number.
Once I assisted in locating a stolen car, and the process was quite enlightening. The police used a camera network to scan license plates, with the system automatically recognizing numbers and matching them against a database, enabling real-time tracking of the vehicle's location. However, ordinary drivers don't have access to this method due to strict privacy regulations. It's advisable for car owners to install anti-theft systems or GPS trackers to prevent loss. Recording license plate information is also crucial—such as taking photos for records or joining local security programs. In case of issues, promptly report to the police and provide the accurate license plate number to expedite recovery. Additionally, keeping the license plate clean and in a fixed position helps avoid recognition errors. Personally, I find these tips highly practical for safe driving.
