As more and more people increase the purchasing power of their cars, many people drive cars daily. Whether they are working or visiting, it also leads to a much more demanding parking lot. If there is a parking lot at this time, If the license plate recognition system is faulty, it is not only the loss of the source of customers. It is therefore very important for some people who manage parking lots to understand some basic causes of errors. So, what are some of the common causes of recognition errors in license plate recognition systems and how can they be solved?

First, the image is not clear

The difficulty in localization of the license plate area mainly comes from the collected images. Due to the diversity of the license plate images collected, and when the images are collected, it is affected by many factors, such as rain, fog, and light, which makes some license plate image quality appear different degrees. The difference.

Solution suggestion: In this case, the recognition result can only achieve satisfactory results only when the image is in focus. There are certain requirements for the photosensitive components of the parking lot system. The video camera must also be improved in some configurations. Look at the video settings are not normal (set properly), monitor resolution, color desktop size adjustment.

Second, different types of models

Whether it is the use of sensation coils or infrared triggering, the impact of the vehicle model is obvious. The trigger positions of carts and trolleys may exceed 0.5 meters even at low speeds. When the distance exceeds 1 meter, the captured image may not be the most clear. of.

Solution suggestion: For this kind of image, it is generally necessary to preprocess the image before the license plate is positioned, and then to perform positioning, segmentation, recognition, etc. of the license plate, which is also very challenging for the system.

Third, the license plate damaged or stained

In the actual application process in highways and cities, it is difficult to ensure that the involved license plates are not defaced. After a license plate is used for several years, pollution and wear will inevitably occur.

Suggestions for Resolution: In this case, many smart parking systems have gradually solved this problem, but if it is too serious, it has to rely on artificial labor.

Fourth, software failure

1, management software crashes

(1) Restart the computer

(2) Conflicts between video cards and other cards, change slots

(3) Change the interrupt number

2, the software can not enter the access management

(1) Check if the card reader is powered on and the communication is normal

(2) The network is normal

(3) Normal computer graphics settings

(4) Is the system setting normal?

3, software slow response or computer crashes when swiping

(1) Check if the operating system is normal (reinstall the system)

(2) The vehicle library data can not be too much (filing a small amount of data)

(3) Whether the network is stable and the transmission rate is low (adjustment speed)

(4) Whether the workstation settings are normal (unified setting)

4, the software image does not take pictures or can not retain the image

(1) Check if the mapped network drive letter is normal (reset)

(2) whether the image is deleted

(3) Check if the image is saved for 0 days

5, the computer is unstable, the system often error, easy to operate when the software crashes

(1) Computer virus killing

(2) Check if the computer records the vehicle records too much

6, computer network instability, disconnected

(1) RJ-4S head is bad, replaceable

(2) The terminal resistance of the BNC head is bad, (replacement)

(3) Is the power of the HUB stable?

(4) whether the network card settings change

Of course, there are some problems in the recognition of vehicle license plate recognition systems. There are some issues that need to be artificially or mechanically advanced. This depends on the development of the car parking system business in the future.

If you want to know more about license plate recognition or parking system, please consult with Dreida or pay attention to Dresdner WeChat public number: szchinatenet, Dreida. Focus on parking business for 15 years. Hope to help you.

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