License Plate Recognition Is the Biggest Power to Realize "Internet Plus Intelligent Parking" -Tiger

Nowadays, all walks of life are actively embracing the Internet, and the parking industry is not. In addition, from the most primitive manual management to intelligent license plate recognition management, there are more and more cars in the city with the development of society. The place for centralized vehicle storage and management has been put forward by human beings, such as the order of vehicle access, the safety of vehicle storage and the compensation of vehicle storage management. The application of license plate recognition technology also greatly meets people's needs, and it is also the driving force to realize intelligent parking management system. I. the process of automatic license plate recognition the process of automatic license plate recognition is that the front end of the system adopts an embedded HD integrated camera, which can realize the output of video and picture code stream with million resolution, built-in high-performance DSP chip, supports built-in intelligent algorithm, and can realize video detection, automatic license plate recognition and other functions.

The automatic license plate recognition system with built-in camera uses a unique texture model algorithm, which has the characteristics of accurate positioning, fast recognition speed, high recognition accuracy and low false recognition rate. It can not only capture vehicles with license plates, but also capture unlicensed vehicles normally. Transplanting the license plate recognition algorithm based on the back-end server or front-end industrial computer in the traditional mode to the front-end camera has the characteristics of high integration, high stability and high adaptability. Compared with the traditional PC or industrial computer mode, it can better adapt to the complex environment of the actual road and meet the requirements of all-weather work in the intelligent transportation system. Dynamic video recognition technology is adopted to recognize each frame image of video stream, so as to increase the number of recognition and comparison, and greatly improve the efficiency and accuracy of recognition.

The automatic recognition of vehicle license plate is mainly based on the theory of image segmentation and image recognition to analyze and process the image containing vehicle license plate, so as to determine the position of license plate in the image, and further extract and recognize text characters. The specific steps of recognition are divided into license plate location, license plate extraction and character recognition. In the natural environment, the camera first carries out a large-scale correlation search on the collected video image, finds several regions in line with the characteristics of the vehicle license plate as candidate regions, then further analyzes and evaluates these candidate regions, and finally selects an optimal region as the license plate region, which is segmented from the image. After the location of the license plate area is completed, the license plate area is divided into single characters, and then recognized. The license plate recognition algorithm adopts the template matching algorithm.

Firstly, the segmented characters are binarized, and their size is scaled to the size of the template in the character database, then matched with all templates, and finally selected the best matching as the result, Through this multiple comparison, the accuracy of license plate recognition is greatly improved. II. Application characteristics of automatic license plate recognition system 1. Strong ISP processing ability. The recognition rate of automatic license plate recognition system is closely related to the quality of license plate and captured image. Not only the rust, stain, paint peeling, font fading and other factors of license plate itself will greatly affect the accuracy of license plate recognition, And whether the shooting environment is ideal will also have a great impact on license plate recognition. The intelligent traffic camera has built-in powerful ISP processing functions, which can provide video stability, face detection, noise filtering, automatic white balance, automatic exposure, gamma correction, edge enhancement and other functions, improve the image quality and effect to a new level, and not only improve the actual appearance of users, It provides a good operation and analysis basis for more intelligent applications such as license plate recognition, and fully ensures the high accuracy of license plate recognition. 2. Many license plate recognition systems have good adaptability to light and climate background.

The recognition rate of license plate recognition system is high in cloudy days, but it decreases or even cannot be recognized in sunny days. In the case of direct light, the shooting direction is the same as the direction of sunlight. The captured license plate area is very bright, resulting in thick character strokes and mutual adhesion. Moreover, China's license plates use reflective paint, which will appear specular reflection in serious cases, so it is impossible to see the license plate number. In addition, the bright lines and halos generated by the reflection on the vehicle body surface will also affect the recognition.

License plate recognition is mostly used to identify moving vehicles. The license plate area is not fixed in the whole image, and ordinary cameras cannot adjust according to the license plate area. When the vehicle lights are turned on at night, the exposure intensity of the ordinary camera is weakened by the influence of the headlights, resulting in the dark image license plate area and the inability to see the number. The light of the headlights may also form a large halo to block the license plate area. As an important part of urban static traffic, parking lot is becoming more and more intelligent today, and intelligent license plate recognition technology plays a key role.

With the continuous progress of computer technology and the development of software intelligent application algorithm, license plate recognition technology will be more mature and will gradually replace IC card swiping, which will bring another major change to the intellectualization of parking lot entrance and exit management. License plate recognition technology has practical significance for maintaining traffic safety and urban public security, preventing traffic congestion and realizing full automatic traffic management. It is the biggest driving force to realize intelligent parking management system. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.