How to choose a license plate recognition solution

Automated License Plate Recognition (ALPR) solutions are becoming more recognized by end customers because people always want to be able to identify vehicles and people as they enter their area. Many solution providers are also aware of the potential of the market, and have provided corresponding license plate recognition schemes. As the schemes are flooded and uneven, this will be very confusing for users. For many integrators, when installing and selecting a license plate recognition scheme, it is often impossible to determine which one is the ideal practice, and often it is not possible to provide suitable services for users.

Select the standard for the ALPR solution

The first step in getting the solution to get up and running successfully is to choose the camera product that meets the criteria.

1. Match the application scene to the camera specifications

A key factor to consider in the ALPR system is the camera specifications. For example, depending on the installation location, the camera will have different options. In places such as highways or high-density commercial complexes, cameras should be sophisticated enough to ensure high fidelity capture of images. Inevitably, this will increase costs, and customers should be aware of this.

Since the focus, motion blur and lighting conditions will affect the camera's capture effect and reduce the accuracy of the system, when selecting a solution, it should be tested in one day or in various special environments to ensure the accuracy of the system.

2, local processing and cloud processing

Whether it is necessary to discuss the cloud, it has been very intense recently, but at present, in the license plate recognition scheme, the local processing will provide better results. In many applications, license plate recognition is often integrated with mobile payment. Considering the real-time nature of the system, the local processing method will be better, because if it is on the cloud, it will not only increase the delay, but also let the user The security of the network raises concerns.

3, adaptability

In Western countries, new laws and regulations can affect the change of license plate style, and the license plate recognition solution is very suitable if it can be modified or upgraded. However, in some countries in Asia, the design of license plates is relatively lacking in standardization. Users in these countries should consider more flexible identification schemes when choosing solutions.

Taken together, with the development of license plates and changes in policies, it is important to choose a system that is adaptable to development and that can be continuously upgraded over time.

What to know when installing ALPR

Once you have chosen a solution that meets your needs, you should review the practices of its installation, from camera configuration to fine-tuning for the environment.

1, camera settings

Most ALPR systems require fine-tuning of the camera during day and night conditions. It is important that the integrator properly configure the camera settings to ensure that the vehicle or character is captured at any time of the day. In addition, the camera's position and height also play a vital role.

2. Supplementary infrastructure

The integrator should understand the amount of data flowing to the external server and guarantee the appropriate bandwidth support, a good local network connection will be necessary.

If it is a low-cost solution, it is important to make the vehicle approaching still in the area to obtain video images, such as installing a deceleration device on the road to decelerate the vehicle. If it is necessary for the trailing problem, the installation position of the camera should be avoided. Occlusion.

3, reading delay

When using it in an authentication scheme, it is important to keep the read latency low. Proper adjustment of various camera and software parameters may help achieve this goal.

ALPR customers often make mistakes

Camera specifications that are not properly valued are common mistakes in the field. For example, when the fine-tuned shutter speed is not matched to the speed of the vehicle, the visual effect may be unclear. Not getting the correct potential reading is also a problem. The quality of the ALPR solution, especially its level of accuracy, is critical. However, many customers often do not check these parameters and compare them with other parameters when choosing a solution.