High definition electronic police system (composite mode)

Project Overview
The new generation high-definition electronic police system is a comprehensive intersection based illegal monitoring and recording system for urban traffic management. It integrates multiple patented technologies and adopts multiple IT high-tech technologies, such as video encoding and decoding technology, embedded system technology, storage technology, network technology, intelligent technology, and pattern recognition technology, to achieve four in one functions of checkpoint passing vehicle recording, electric police violation detection, video surveillance, and road traffic parameter collection. The system can be widely applied to urban highway intersections, ramp entrances, single lane roads, etc., to monitor passing vehicles 24/7 and record illegal activities in real time.
Background and Challenges
As a key point in urban transportation - road intersections, they often become a key location for traffic congestion in urban road networks due to the convergence of traffic flow from multiple directions, as well as factors such as time lost waiting for red lights and mixed traffic of vehicles and non vehicles. And illegal phenomena such as running red lights, driving in the wrong direction, and speeding have become the main causes of road traffic accidents. The various tragedies and tragedies caused by this have flooded reports and the internet, such as the "70 yard" incident in Hangzhou, casting a shadow over families.
To ensure the safety of people's livelihoods and ease traffic congestion, various regions have continued to pay attention to and increase investment in the construction of urban traffic electronic police systems. With the deepening of construction, the development of electronic police is also advancing rapidly. Looking back at the development process of electronic police in China, it is basically aimed at improving and developing local functions and performance to solve problems. However, the construction mode of electronic police still continues the essence of the past, which had multiple types of front-end equipment, loose architecture, and low integration, often resulting in an awkward situation of easy construction in the early stage and frequent use failures in the later stage. This has also become an urgent problem that needs to be solved by the current public security and transportation departments.
In response to the above challenges, based on rich experience in the field of video surveillance, a high-definition electronic police system solution has been launched, which provides important scientific and technological basis for the public security traffic management department to strengthen the capture of illegal vehicles, realize real-time video monitoring of roads, and collect traffic data in real time. It also provides guarantees for the comprehensive utilization of management information platforms and the comprehensive strengthening of traffic information guidance, effectively curbing traffic violations, regulating road driving order, alleviating traffic conflicts, traffic congestion, and high incidence of traffic accidents caused by insufficient police force and rapidly increasing traffic demand.
Solution
system architecture
The system combines the coil detection method with the video detection method, which reflects the advantages of high capture rate of coils and diverse types of illegal video capture. The system uses 2 million, 3 million, or 5 million CCD high-definition integrated cameras as the collection main body. A single camera of 2 million covers one lane in one direction, a single camera of 3 million covers two lanes in one direction, and a single camera of 5 million covers three lanes in one direction; Synchronize support for flash and LED strobe lights for supplementary lighting.
The system mainly consists of a front-end terminal system, a network transmission subsystem, and a back-end management subsystem. The overall structure of the system is as follows:

System Features
1. Highly integrated and integrated
The high-definition electric police all-in-one machine adopts the "image sensor+ISP+DSP" technology solution on the hardware, and is equipped with traffic vehicle detection, recognition, and violation detection algorithms with independent intellectual property rights. It integrates many functions such as "image acquisition+vehicle detection+license plate recognition+violation judgment". Solved the problem of multiple front-end vehicle inspection devices, industrial control computers, capture cameras, and mixed brands in traditional electronic police systems, eliminating the hidden dangers of poor compatibility, poor stability, and multiple fault points between devices in the original industrial control computer mode.
2. Dual detection mode of coil and video
The system combines the coil detection method with the video detection method, which reflects the advantages of high capture rate of coils and diverse types of illegal video capture:
1) Coil detection mode, the system determines the status of traffic lights through signal detectors and detects the presence of vehicles through ground sensing coils. When in a red light state and a vehicle passes by, the vehicle detector triggers a high-definition intelligent camera to capture the violating vehicle, with high capture and recognition rates.
2) Video detection mode, the system automatically detects, locks, and tracks moving objects in the video stream in real-time frame by frame. Based on the vehicle's motion trajectory, it determines whether the vehicle has violated regulations and records them. There are various types of violation detection.
3. Industry leading license plate recognition technology
The system adopts multi frame image license plate recognition technology. Single frame image license plate recognition is trained using over 100000 sample photos, achieving high stability in license plate detection (positioning), character cutting, character recognition, and other aspects, improving the accuracy of single frame image license plate recognition. At the same time, the computational efficiency of single frame image license plate recognition algorithm is optimized;
Multi frame license plate recognition technology can select the most favorable recognition result for imaging and avoid overexposed positions of the license plate.
4. Industry leading video tracking technology
The system integrates several of the most advanced tracking algorithms internationally, allowing us to extend the effective tracking distance from the current stop line to the stop line at the opposite traffic light position, greatly improving the reliability of violation detection;
The tracking algorithm based on vehicle contours can improve the accuracy of distinguishing between preceding and following vehicles, even if the vehicle does not have a license plate, it can still capture and track;
In addition to being able to capture red light running behavior, it can also capture other illegal behaviors such as crossing the line and driving in the wrong lane.
5. Effectively avoiding environmental interference
The system combines the recognition and processing of the area information identified by the virtual coil with the information of the vehicle's motion vector trajectory to determine whether the vehicle is running a red light, greatly improving its adaptability to environmental changes;
Comprehensively analyze the overall and local characteristics of various noises, and adopt internationally advanced computer heuristic hybrid intelligent optimization algorithms to achieve filtering and attenuation of various noises.