Summary of the Scheme Book of Automatic License Plate Recognition System in Qingdao Parking lot

In modern parking lot management, it involves all aspects of management, in which vehicle management is an important aspect. Especially for special parking lots, courtyards and government organs,
As far as the community is concerned, strict real-time management is required for all kinds of vehicles, strict monitoring of their entry and exit time, and registration and identification of all kinds of vehicles (including internal and external vehicles).
In large-scale venues, there are many kinds of vehicles entering and leaving. For example, each vehicle needs to be judged manually, which is time-consuming, not conducive to management and inquiry, and the security work is difficult and inefficient. In order to improve this and modern parking lot,
The disproportionate management modes of courtyards, government organs and residential districts need to realize the automation and intellectualization of vehicle management as soon as possible, and be managed in the form of computer network, so as to carry out effective management of all vehicles entering and exiting.
Accurate monitoring and management. Require the system to provide the corresponding application software to realize the high efficiency and intelligence of camp management.

The system is based on the automatic license plate recognition algorithm of video stream, which captures and identifies the license plate without triggering the ground sense. When the vehicle enters the entrance of the community, the automatic license plate recognition algorithm automatically captures the photos of the vehicle and identifies the license plate number.
By transferring and recording the license plate number, color, license plate characteristic data, and admission time information, the vehicle can enter and leave the parking lot without obstacles, which provides a brand-new service mode for users.

The system automatically identifies the number and license plate characteristics of vehicles entering the residential area, verifies the legitimate identity of users, automatically compares the blacklist database, automatically alarms, and monitors and manages the whole parking lot, including access management.
Internal management, collection, storage of data and system working status, so that administrators can monitor, maintain, statistics, query and print reports. Vehicles entering and leaving the district are under the control of the system, so that the entry and exit of the district can be charged.
Anti-theft, fully intelligent parking space management, automation and has the advantages of convenient, fast, safe and reliable.

Its main characteristics are as follows:

_Recognition system's dependence on the environment is reduced to a minimum, and it can work normally all the time, and the recognition rate is maintained.

Higher level.

_LPR-based recognition system improves the speed and accuracy of recognition.

_Recognizable minimum plate width is 70 pixels

High recognition rate can be guaranteed by adapting to complex climate and illumination conditions, such as cloudy, rainy and evening.

High recognition rate can be guaranteed when the speed is 200 km/h and the single lane flow is 30 vehicles/minute.

(>95%).

To achieve frame-by-frame processing of video images, trigger video streams, without burying ground inductance coils, to avoid damage to the road surface.

The project is easy to install, stable to operate, and does not interfere with the user's existing system.

_No need for ground sensing and vehicle detector, which saves cost and construction is simple and fast, and greatly shortens the construction time.

_has a very high processing capacity, all images in the process of vehicle travel are recognized and processed, independent of the single.

Take a picture to effectively improve the adaptability of equipment to complex environment
Vehicles reach the camera recognition area at the entrance of the community, automatically identify the vehicle license plate number, and make a judgment on the type of vehicle. Internal vehicle: Auto-release/manual release is optional. Vehicle access information and picture storage database.

Temporary car: Auto-release/manual release is optional. Timing and saving entrance snapshot pictures to database.

Unable to confirm the vehicle: can be released manually, can enter the license plate number manually, manually modify the license plate number, record the database.

Vehicles reach the camera recognition area at the entrance of the community, automatically identify the vehicle license plate number, and make a judgment on the type of vehicle. Internal vehicle: Auto-release/manual release is optional. Vehicle access information and picture storage database.

Temporary car: Auto-release/manual release is optional. Timing and saving entrance snapshot pictures to database. If the fee is charged according to the standard of temporary car fee, manual release is generally chosen.

Unable to confirm the vehicle: manual release, manual input license plate number, record database, and generate the correct cost.

Personally, I don't think the latter part will be of much use. Then it's time to add our own stuff. When an internal car enters the picture above, it can automatically switch on and enter. You can choose the upload system.
It can be seen as a switch. Some devices in the home start to work through the wireless network, such as: air conditioning on, humidity regulation, automatic lights on, speakers and so on. Similarly, when the car leaves the residential area, it can control the home equipment to turn off the lights automatically.
Turn off gas and so on.

Each entrance and exit is equipped with a camera post with a height of 1.0-1.5 meters. A special camera for license plate recognition is installed on the post. The camera lens points to the ground about 4.0-5.5 meters in front of the lane and aims at the license plate.