Application of High Definition Security Checkpoint System in Safe City Project

Safe cities drive up demand for security checkpoints
Since the launch of the Safe City project, traffic intersections, social security hotspots, residential areas, internet cafes, etc. have always been important locations and key monitoring objects of video surveillance systems. However, in previous applications, due to the lack of automatic vehicle capture and license plate recognition capabilities in the corresponding video surveillance equipment of the system, the system was unable to promptly alert the deployed vehicles in case of criminal cases related to vehicles, or it was difficult to search for the corresponding vehicles by entering the license plate number in the system. The result of this is that public security investigators can only find relevant vehicle information by reviewing a large number of video recordings from each monitoring point one by one, without knowing the time and location. This method of huge workload and delayed response time obviously cannot achieve timely and accurate control of vehicle crimes, and cannot reflect the goal of "seeking manpower from technology".
In view of the insufficient monitoring of vehicles exposed above, in recent years, various cities have included the construction of security checkpoint systems in their key planning for the subsequent construction of safe cities. Key deployments have been made at various important entrances and exits in the city to capture and recognize the license plates of all vehicles entering and leaving, in order to grasp the situation of vehicles entering and leaving.

The innovation brought by the high-definition checkpoint system

Since the comprehensive application of high-definition cameras in safe city construction projects, the high-definition checkpoint system with this as the core equipment has gradually replaced the previous standard definition checkpoint system. Due to the application of high-definition technology, the clarity of the collected images has been greatly improved, which has led to innovative breakthroughs in the recognition of license plates, facial features of drivers and passengers, clothing features, etc., providing powerful scientific and technological means for public security to judge fake license plate vehicles and track fugitives.
At the same time, in the main roads of the city, a card type electronic police system is also used to analyze the trajectory of vehicles, comprehensively grasp the running trajectory of vehicles in the city, and provide effective basis for public security investigators to handle cases. Due to the comprehensive monitoring of vehicles and people by the new high-definition security checkpoint system, a three-dimensional urban security prevention and control system has been formed, which more effectively reflects the power of technological prevention.
The following is a brief discussion on the innovative application of high-definition checkpoint system in the Safe City project.

1. System value embodiment: Extracting details and improving efficiency
The high-definition checkpoint system is designed according to the concept of system application, following relevant national technical standards, conducting large-scale research on the needs of public security business, and achieving a high degree of compatibility between technology implementation and business development. The system technology serves practical situations, making it efficient, intelligent, and convenient for public security departments to use this system to collect on-site details and solve cases.

2. Design concept: serving practical applications
Design according to the concept of comprehensive system application, rather than general software and hardware stacking;
Introducing high-definition image processing technology, video triggering technology, high-definition license plate recognition technology, vehicle color recognition technology, mixed data transmission technology, multi-dimensional data fusion mining technology, electronic map dynamic image presentation technology, etc., to revolutionize and upgrade the traditional checkpoint system;
The platform software is designed to meet the needs of public security operations to the fullest extent possible. The principle of setting functional modules always revolves around practical needs, and a multi-level security checkpoint information sharing system is constructed;
The system performance indicators have reached and exceeded the relevant national standards.

3. Important feature: Comprehensive application of high-tech

High performance multifunctional high-definition camera
The high-definition camera adopts a high-definition CCD+ISP+high-performance DSP architecture design, integrating core functions such as high-definition video capture, high-definition video processing, license plate recognition, vehicle color recognition, and video triggering. ISP processing algorithms have independent intellectual property rights and can be optimized for unique on-site environments to ensure that high-definition image quality is superior to similar products. High performance DSP can simultaneously run algorithms such as license plate recognition, vehicle color recognition, and video triggering, and all algorithms have independent intellectual property rights, which is conducive to algorithm optimization.
In addition, the high-definition camera adopts three intelligent functions in the front, which has the following advantages: firstly, it can share the intelligent computing pressure of the system (under the condition that the high-definition camera has sufficient processing performance, it saves the investment of backend servers); Secondly, the image source required for analysis is closest to the real environment, resulting in more accurate analysis results.

Combining ground sensing coils with video triggering
A vehicle capture triggering mechanism that combines ground sensing coil detection as the main method and video triggered detection as the auxiliary method. Usually, ground sensing coil detection is used. When the ground sensing coil or vehicle inspection device malfunctions, the front-end system can automatically switch to video triggered detection mode and send an alarm signal to the platform to notify maintenance personnel for repair. After the local induction coil is repaired, the front-end system can automatically switch back to the detection mode of the induction coil, returning to the normal working state without manual intervention during the switching process. Minimize the occurrence of long-term missed vehicles and no records due to faults in the ground sensing coil or vehicle inspection device.

Combining intelligent recognition algorithms with software platform data mining
On the premise of ensuring the accuracy of license plate recognition (including license plate number and color) and body color recognition, a large number of vehicle related records (high-definition photos, high-definition videos, passing information, recognition results) are constructed into a data warehouse and analyzed through data mining techniques on the software platform. More accurate execution of fake license plate vehicle analysis, vehicle correlation analysis, and other technical means that help public security solve cases.

Combining centralized storage with front-end caching
Deploy a centralized storage system (IPSAN or FCSAN) in the central computer room, configure data caching devices (industrial hard drives or SD cards) in the field, and use the scheduling function of the software platform to form a comprehensive storage system with front-end and back-end communication links.
When the communication between the front-end system and the central system is normal, the vehicle related data is automatically uploaded to the central system in real time. If there is a link interruption or other failure, the data will be cached in the external system. After the fault is restored, the system will automatically supplement the cached data in the front-end to the central system to ensure the integrity of the stored data.

Combining high-definition vehicle photos with high-definition panoramic videos
High definition vehicle photos mainly reflect vehicle details, license plate details, and facial details of drivers and passengers, while high-definition panoramic videos mainly reflect the macro dynamic situation of the entire checkpoint section. The combination of the two will provide richer and more accurate information for event evidence collection.

Automatic monitoring and graphical display of equipment operation status across the entire network
The central platform can automatically monitor the operating status of all network devices, including ground sensing coils, vehicle inspection equipment, high-definition cameras, outdoor processing equipment, network equipment, platform servers, and so on. Display the working conditions of each device in a graphical manner, prompt information such as normal, abnormal, and fault types, and issue alarm messages.

A combat platform based on public security business
City level and even cross regional data and information resource sharing, unified automatic control and alarm throughout the network, vehicle trajectory tracking and characterization, data mining of criminal investigation and case solving principles, central emergency command and mobilization of comprehensive police force for case handling, and so on.