The license plate recognition technology adopts advanced image processing mode and artificial intelligence technology to realize the access to the parking lot without the use of a parking card, which greatly accelerates the speed of vehicle traffic, and is widely used in major parking lots. The research and development of the license plate recognition system has improved the efficiency of parking lot management, reduced personnel management costs, and has become an important part of intelligent transportation.
However, the license plate recognition system sometimes still has recognition errors, so how should we improve the license plate recognition rate?
We can optimize the license plate recognition algorithm from the following five characteristics to improve the recognition rate of the license plate recognition system.
1. Accuracy, that is, each calculation step of the algorithm has an accurate definition
2. The input item is a specific license plate image;
3. The output item is the result of license plate recognition;
4. Feasibility is the effect of license plate recognition.
In addition to optimization from internal factors, factors that affect the rate of license plate recognition include external factors such as viewpoint conversion, light, occlusion, scale, deformation, and complex background.
The license plate recognition system is composed of crossings, vehicle detectors, high-definition license plate cameras, electronic display screens, and control centers. The high-definition license plate camera captures the import and export license plates, extracts the before and after pictures for comparison, and judges whether the vehicle is released. The parking lot license plate recognition has high requirements on the entire system, and the external environment has a great influence on the recognition rate of the license plate.
First of all, ensure that the light of the parking lot environment is bright enough. When the night or the light is low, some lighting equipment should be appropriately added.
Secondly, it is necessary to ensure that the license plate entering and leaving the parking lot is not damaged so that the license plate number can be identified and captured.