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With the popularity of video surveillance, “deep use†has become an important issue facing the construction sector after “deepening constructionâ€. “In-depth application†includes two aspects: on the one hand, video surveillance is served by more relevant departments, to avoid redundant construction of the monitoring system, and to improve the efficiency of the system; on the other hand, the intelligentization of the monitoring system is achieved through technical means. Reduce labor costs, and better realize the use value of "seeing the clear" and "seeing the far" of the monitoring system. For example, in the early system, there were specialized personnel staring at the display terminal, but after the new feeling, it was visual fatigue. If you cannot solve the “what time to see†basic problem, you would not be able to talk about “deep applicationâ€. More video surveillance will be implemented. Gradually lose use value. In order to realize the system intelligence problem, this article discusses the "depth application" of the monitoring system.
Active defense is the development direction of “deep application†The ultimate goal of monitoring system construction is to establish a complete set of public security prevention and control system. “Defense†is the goal and how to effectively prevent it, especially after many years of security system construction. Massive video information, how to find "protection points." From the perspective of video surveillance applications, it can be roughly divided into three phases:
Looking for evidence afterwards, many security systems currently require the preservation of video information for 15 days. Some key departments even require 30 days or even 60 days. The essence of this is to look for relevant evidence after the incident. This is also the current video surveillance system. The main use. Finding evidence afterwards provides criminals with time to hide and increases the time for handling cases. Some illegal activities can only see things happening on the video, and it is impossible to determine who committed the crime.
It is undeniable that video surveillance provides evidence for the enforcement of law at the current stage, which has led to an increase in the detection rate. However, according to the experience of developed countries, the initial stage of video surveillance has played a very good effect, but as people are familiar with the product, various coping methods have led to a gradual decrease in the role of video surveillance. The domestic news media are also constantly reporting that, in some cases where there is a lot of incidents, “just happened†to video surveillance. Therefore, if video surveillance systems play a greater role, they need to play a role in the process of events.
The real significance of the existence of the video surveillance system in the decision-support phase is the emergency management of emergencies, including not only various types of criminal cases, sudden public safety incidents, etc., and it is most appropriate to implement auxiliary command center decisions in the shortest possible time. The resources complete the handling of emergency events.
To implement decision support in the event, the alarm mechanism is an important factor, including alarms for abnormal conditions of equipment and alarm mechanisms for emergencies. The realization of the alarm mechanism requires that the video surveillance system has preliminary intelligence, and the entire system is in the process of architecture. The rate of false alarms is low and requires the use of intelligent technologies such as video analytics in the system. In addition, in the course of event processing, due to the different opinions of the participants on the events, different preferences will appear. According to the difficulty of the video “seeing†the events, the emergency command center will coordinate and dispatch the resources.
It must be emphasized that the emergency command center is distributed, and according to the degree of difficulty of event management, it is decided which level of command center to use for dispatch. For example, the same theft case is due to different levels of damage, the resources required to coordinate the command center are also different, and in the case of casualties, a high-level command center is required to further dispatch medical and transportation resources to achieve rapid processing of cases. To achieve this stage, we must address the "watch to whom" video surveillance.
Advance prevention in advance will enable the entire video surveillance system to enter a completely intelligent stage and realize “ubiquitous video networkâ€, which is an important application in the security of the Internet of Things. Video awareness is only part of the system, in addition there are a large number of sensors with and after The "cloud computing" center performs a lot of information processing. The human will is embodied by the "Cloud Computing" Center. The "Cloud Computing" Center is a library of various types of cases. It is like an expert who is experienced in all kinds of matters and accurately judges what may happen based on the perception of video.
The pre-defense committee will automatically generate command instructions based on the system's internal freedom plan and issue it to relevant participants to effectively ensure that the events of the prevention system are within control.
The clarity of the three stages of the development of video surveillance provides a clear direction for the future “depth application†of video surveillance. With the application of various technologies, it gradually reflects the nature of “seeing†the video surveillance system, and thus in the Internet of Things security system. To achieve "see" function.
Intelligent HD is the foundation of active defense From the current level of technology, intelligent high-definition monitoring system is the key to solve "deep application", through "seeing the clear" "see far" and linkage with other application systems (service coordination) In order to realize the active defense function of the video surveillance system, from another perspective, it can effectively realize the smooth transition from the security guard function to the visual management function of the video surveillance system.
At present, dual-stream technology has gradually become the basic configuration of high-definition products, and its key is to solve the overall application of video to meet local applications, that is, through the high-definition capture of the entire video, the local key locations are amplified to achieve "see the clear "the goal of. Therefore, the significance of high-definition is that it does not require clear viewing of the entire image, but the key position (local) must be clear. At present, mainstream applications based on high-definition are all the same, such as: bayonet monitoring, violation is an entire picture, but there must be license plate this part of the picture to cooperate in order to achieve violation confirmation.
Realizing partial display and full-screen dual display requires high-definition support. If a traditional D1 or CIF is used, it is obvious that the partial screen cannot achieve sufficient sharpness, and the key points cannot be confirmed. Appropriate recognition technologies will be applied in the partial images, such as license plate recognition, vehicle license plate automatic recognition algorithm (number plate identification, license plate color recognition) integrated in high-definition network cameras, and the recognition results will be directly output by high-definition network cameras, and the average recognition rate in all weathers Greater than 95%. It makes the front-end construction as simple as possible and the construction and maintenance more convenient. That is, the graphic content is converted into digital content, and the owner's contact information is found through the license plate content, and the owner is notified of the violation information through a mobile phone message.
Whether it is dual-stream and future multi-stream technology or license plate recognition technology and other intelligent technologies are all based on high-definition, if you can not achieve local clarity, intelligent technology can not accurately identify image information and convert it into corresponding figures Information, thus unable to be intelligent, still requires traditional manual monitoring and cannot achieve the development from passive defense to active defense.
In addition, in the depth of the application process, the earliest embodiment of the industry applications, the emergence of intelligent high-definition, for security products in the industry applications to expand a new space, intelligence reflects the problems that occur in the industry characteristics, such as: high-definition monitoring in the week The application of the defensive defensive and the technology adopted in the application management of the bayonet are completely different, mainly because the focus of the two is different. The perimeter guards focus on human behavior analysis and virtual perimeter alerts, while the bayonet focuses on license plate recognition.
Therefore, in the high-definition monitoring system, intelligence, high-definition is the basis of active defense, the two complement each other and are indispensable. Without intelligent analysis elements, pure high-definition monitoring cannot achieve deep application, and it cannot achieve active defense, and it can not better reflect the use value of high-definition monitoring system. Pure intelligence, if there is no correct and clear picture provided by HD, Video information, intelligence will not come to a correct conclusion. From the current application case, smart and HD have always been bundled together, and perhaps in order to truly reflect the value of high-definition monitoring systems.
Intelligent video management is the key to active defense Video management is divided into two parts: front-end video management and back-end video management. Front-end video management is commonly referred to as smart front-end and other system linkages, including signal linkages such as alarms, access control, RFID, and video analysis. From the current point of view, the front-end linkage is mainly based on video analysis, and linkage of other systems is also implemented. There is more room for development; back-end management is mainly achieved through platform management software, including rights control, video abstraction, video retrieval and other technologies.
An important bottleneck in video management is video transmission. Only by implementing effective video transmission can the back-end management actually manage the front-end video signal. Otherwise, no matter how good video management does not support video transmission, it can only be empty talk. Although the construction of the video surveillance private network solves some of the transmission problems, with the wide expansion of video applications, public network transmission has become an important bottleneck for deep video applications.
The difference between passive defense and active defense is mainly whether the video management is smart. When faced with a small amount of video, the importance of video management is less demanding. However, in the face of massive video, there is no good management mechanism and it cannot be implemented. Video intelligent control, it is difficult to achieve active defense, video surveillance depth application will not be able to talk about.
The same video management also has the characteristics of industry applications. Different industries have different focuses on video and video management methods are different. For example, in the emergency command system, video management concerns are regional and cross-region video management and information coordination with related departments in the emergency; in highway management, video management focuses on charges, weather conditions, and congestion congestion; In public security applications, attention is paid to public security management and on-site evidence management. Different application requirements determine the authority and functions of system management.
The ultimate goal of video management is to allow managers to "see" when they need to "see" and do not need to "see" when the system is operating normally. It is through the system's own intelligent management to achieve "unmanned care", and even through environmental analysis, etc., to achieve early warning, so as to effectively achieve active defense, more to reduce the impact of subjective awareness on the system.
Therefore, in the process of deep application of high-definition monitoring systems, if there is no intelligent video management function, people still need to “see†the display terminal and make corresponding judgments. Therefore, the monitoring system is still difficult to obtain deep applications and cannot achieve “active defenseâ€.
In short, the development of intelligent high-definition surveillance systems is centered on "deep application."
Application of Video Surveillance on Intelligent HD Monitoring System
Introduction: With the popularity of video surveillance, "deep use" has become an important issue facing the construction sector after "deepening construction." “In-depth application†includes two aspects: on the one hand, video surveillance is served by more relevant departments, to avoid redundant construction of the monitoring system, and to improve the efficiency of the system; on the other hand, the intelligentization of the monitoring system is achieved through technical means. Reduce labor costs, and better realize the use value of "seeing the clear" and "seeing the far" of the monitoring system. On May 22, 2011, the National Bureau of Public Security Directors Symposium was held in Shanghai. Meng Jianzhu emphasized that the informationization of public security is a brand-new policing revolution. Public security organs at all levels must actively adapt to the new trend of rapid development of informationization, further promote the informationization of public security, and insist on "deepening construction" and "deepening application". We will improve information sharing mechanisms, crack down on criminal work mechanisms, social security prevention systems, and new types of decision-making and command models to achieve a higher level of basic information, information sharing, level of judgment, and overall application efficiency. We will strive to improve the core combat effectiveness of public security agencies.