Intelligent Parking Lot Management System - License Plate Recognition - Gate Equipment Manufacturer

The invention relates to a passive vehicle license plate intelligent recognition method of parking lot management system, 2 direct method: the image-based license plate recognition technology belongs to direct method. It can collect non-contact information and identify the license plate numbers of moving or stationary vehicles in real time without any special on-board transmitting equipment transmitting license plate signals. Compared with the indirect identification system, firstly, this system saves equipment arrangement and a lot of money, so as to improve economic benefits; Secondly, due to the use of advanced computer application technology, it can improve the recognition speed and better solve the real-time problem; Thirdly, the recognition is based on the image, so the recognition errors in the system can be solved through people's participation, while other methods are difficult to interact with people, and implement the work in practice, uphold and carry forward "Improve a little every day. The leapfrog pace of development and conscientious enterprise spirit have not only moved the majority of consumers, but also won wide recognition from the government and the industry. Thank people from all walks of life for their strong support to our company.

The company sincerely thanks new and old customers for their trust in our brand over the years. As well as a background management software that meets specific application needs Composition. The basic hardware configuration of a license plate recognition system is composed of camera, main control computer, acquisition card and lighting device. The software is an image analysis and processing software with license plate recognition function. One is the integration of software and hardware, so the license plate recognition system presents two product forms.

The parking lot management system or the recognition function module is realized by hardware to form one An all hardware license plate recognizer, such as DSP. The other form is an open software and hardware system, that is, the hardware adopts standard industrial products, and the software is embedded software. The two product forms have their own advantages and disadvantages. The advantage of the open system is that the hardware adopts standard industrial products, the operation and maintenance is easy to master, and the sales of spare parts can be obtained from any manufacturer We are worried about the permanent failure of products or difficulties in procurement due to the bankruptcy of a manufacturer or lack of supply. The integrated software and hardware products are easier for users to operate and control when operating the products. It is also easier to master the later maintenance and debugging.

One is peripheral trigger, and the license plate recognition system has two trigger modes. The other is video trigger. The license plate recognition system receives the vehicle After the vehicle trigger signal, the peripheral trigger working mode refers to the use of coil, infrared or other detectors to detect the vehicle passing signal. Collect the vehicle image, automatically identify the license plate and carry out subsequent disposal. This method has the advantages of high trigger rate and stable performance; the disadvantage is that it needs to cut the ground and lay the coil, which has a large amount of construction. It can detect the vehicle movement on the lane in real time and trigger by video The method means that the license plate recognition system adopts the dynamic moving target sequence image analysis and processing technology. When the vehicle is found to pass, the vehicle image is captured, the vehicle license plate is recognized, and subsequent processing is carried out. The video trigger method does not need the help of coil, infrared or other hardware vehicle detector.

The advantage of this method is that it is convenient for construction, does not need to cut the ground, lay the coil, and does not need to install the vehicle detector But its disadvantages are also very significant. Due to the limit of the algorithm, the trigger rate and recognition rate of this scheme are much lower than those of the external trigger. 1 indirect method: it refers to the parking lot management system that recognizes the license plate and related information through the information of the license plate stored in the IC card or bar code of the recognition device on the vehicle. The IC card technology has high recognition accuracy and can be used all day But the whole device is expensive and the hardware equipment is very complex, so it is not suitable for remote operation; bar code technology has the advantages of fast recognition speed, high accuracy, strong reliability and low interest, but it has high requirements for scanners. In addition, both of them need to formulate national unified specifications, and can not check whether the car and bar code are consistent, which is also a technical problem On the other hand, it is difficult to popularize in a short time.