How to Promote Video Surveillance Industry into Full HD Times

1. Why the intuitive feeling of high-definition HD is the definition. Ordinary people know more about security monitoring from TV news. If criminal cases such as theft, robbery, fight, and murder occur, the criminal investigators retrieve the surveillance video and analyze the picture, and detect the case within a few hours. The most direct experience for the people is high-tech means, but also gives them more security. However, there are also reports that “because the monitoring screen is not clear, the suspect’s face cannot be identified, and the detection work has great difficulty”. Such as Changsha shootings, Phoenix jumping women's cases, etc., because of the image is blurred, unable to judge the truth. At this point, if you know more about video surveillance, you definitely know how to solve the problem.

The benefits of HD are more than just pictures. In addition to the high definition of the HD monitor, the range of scenes viewed is also increased. For example, road monitoring, with standard definition cameras, can only cover one lane per camera; with high-definition cameras, each can cover two or three lanes, so that the number of cameras in the entire project is reduced by more than half, and the number of cameras is reduced. The overall cost of engineering installation and wiring work is not higher than standard definition. Another example is bank monitoring. Due to the special environment of the bank, general monitoring does not allow the use of a dome camera, and multiple gun bases are used to cover the entire site. If high-definition monitoring is used, the image definition is not only improved, but also the number of cameras is reduced, making the installation and wiring of the project simple. With the increasing popularity of high-definition, the overall cost will decline.

HD makes intelligent analysis more accurate Intelligent video analysis can be divided into three levels from functional applications:

Detection level: Can detect moving targets from the video screen and achieve target tracking, such as separating a small moving target from the screen, but cannot classify its category (people or car, etc.);

Classification level: Effective classification of detected targets can be made, for example, whether the target is a person or a vehicle;

Recognition level: The “identity” information can be further confirmed for the detected and classified target, such as what type of vehicle it is, and even who it is.

Each of these three levels has its own technical requirements. For example, the detection level requires the analysis of the direction, speed, continuity and matching degree of the target trajectory; the classification level requires the analysis of the edge and deformation of the target; the identification level requires matching with the template. analysis. Regardless of how different the three levels are at different levels of focus, their common basic requirement is the minimum image size, which is the minimum pixel of the target. For example, the minimum target pixel requirement for the detection level is 5X5, and the classification level is 20X20. It is 80X80. Generally speaking, when the effective pixel size of the target is greater than the minimum target pixel requirement of the level at any level, the target effective information is more abundant as the target pixel is increased, and the accuracy of the algorithm analysis is correspondingly higher.

One clear advantage of HD video is that compared to standard-definition video, the effective pixel area per unit area is greater under the conditions of the same focal length and field of view distance, which means that it can provide richer target information for the video analysis algorithm, thereby improving Algorithm accuracy.

2. What should be the era of high-definition surveillance?

Only can not see, not see. The most intuitive experience in the high-definition era is to see more clearly, and all the pictures that are monitored should be clear. There should be no situation where the picture cannot be detected because the picture is not clear.

Interconnection, docking accessibility. In the era of high-definition surveillance, in addition to clear images, interconnection is also important. Now that public security cracks down a complex case, it often requires a lot of camera footage. Some of these cameras are police stations, some are residential areas, some are road traffic, and some are shops. These monitoring videos are scattered and their resolutions are different. To retrieve a complete video, multiple monitoring points must be run and coordination is required. It is very inconvenient to detect work and it is very likely that it missed the critical time for detection. If these surveillance cameras are all connected and interoperable, the detection efficiency of the case can be greatly improved, and a large amount of manpower and material resources can be saved. As the wireless transmission rate is getting higher and higher, the monitoring effect of handheld devices is getting better and better. You can use the mobile phone, pad, notebook, etc. to inspect the home situation, the baby's performance in kindergarten, and so on. In addition to being used for security purposes, connected high-definition cameras can also remotely perceive scenery, e-tourism, traffic reports, telemedicine, tele-education, etc., ie, the Internet of Things and video-related parts.

Smarter intelligence in the era of high-definition should first of all be highly accurate. Can liberate most of the current human monitoring work. There is only one person on duty in each monitoring center and it is not necessary to work in the monitoring room. The alarm device automatically alarms to the monitoring center or alarms to the on-duty personnel's mobile phone and links the on-site image. When there is no one at home, there is an illegal intrusion of thieves. The monitoring equipment automatically sends alarm messages and pictures to the owner. The camera can automatically clean the dust and start the wiper automatically. The camera can automatically recognize special calls for help, such as “help”, “robbery”, “catch the thief”, etc., and locate the source for tracking; it can automatically identify the criminal’s face or voiceprint and alarm. In short, as long as you can think of, monitoring equipment can be intelligent.

Green energy is green, and everyone first thinks of energy saving and emission reduction. In the era of high-definition, surveillance devices are omnipresent. Cameras, DVRs, NVRs, servers, hard disks, display screens, routers, etc. all require electricity. With the depletion of energy sources, electricity prices are getting higher and higher. It is getting higher and higher. In the high-definition era, surveillance equipment should be low-power, and management of surveillance systems should be smart. For example, to store redundant backups, to automatically activate the disk arrays that need to work; for example, dormant display in the absence of alarms; in addition to reducing energy consumption in management, low-power design is also required for device manufacturing, from the chip to the entire From the machine to the system, all links should be green and low power consumption.

Another explanation of green is the energy saving of the relevant parts of the monitoring system. For example, lowering the power of night-time monitoring light sources, reducing patrols by police cars, and reducing congestion by intelligent transportation can all be resolved through smart technologies in the era of high-definition.

3. With the advent of high-definition surveillance era, how far the era of high-definition surveillance has come will require the joint efforts of the industry chain. The advent of high-definition surveillance requires the joint cooperation of all links in the industry chain to be jointly promoted. From upstream chip vendors, including Sensors, ISPs, VADs, Codecs, etc., to monitoring equipment vendors, network equipment vendors, network operators, intelligent analysis vendors, platform management software vendors, display equipment vendors, storage equipment, and management vendors, etc. The complete supporting of the entire industry chain can promote the rapid arrival of the high-definition era.

Industrial environment readiness. If the flow of data from the HD monitoring trend analysis; front-end Sensor in terms of resolution, the mainstream sensor is 2 million pixels. With the further improvement of the image processing effect and the decrease of the price, the requirements of high definition can basically be achieved. The video capture and compression chip, the NVR or DVR master chip, has also been able to handle multiple channels of high-definition, although it can handle 16 channels (similar to the same solution) as standard-definition chips, but it can basically meet the high-definition era. The basic requirements.

Although the high-definition code stream is large, storage devices are also increasing, and 3T hard disk drives have been listed. Storage also has little problem.

It seems that the interconnection and interoperability between devices in the high-definition era are still the industry’s most concerned issues. In the high-definition era, the two solutions of surveillance, IP Camera+NVR and HDCCTV Camera+HDDVR, are rapidly developing. IPCamera docking NVR, NVR access platform, HDDVR access platform to achieve interconnection and intercommunication there are many problems, although there are standards such as ONVIF and PSIA, but the real standardization still has a long way to go.

Smart applications are currently far from the requirements of the HD era. They are mainly based on the accuracy of video analysis. There are still many false positives and false negatives. Audio smart technology applications are relatively slow. However, there is a great concern for intelligence and image clarity. It is believed that the accuracy of intelligent video analysis will be improved on the basis of high-definition video sources.

Fortunately, the supervisory departments of monitoring and control projects in various industries are slowly changing from the original security department to the IT management department or the two departments. This is a good illustration of the gradual IT development of high-definition surveillance, which has laid a good environmental foundation for the interconnection of high-definition era.

4. Conclusion The era of ideal high-definition surveillance is not out of reach, as long as all aspects of the security industry chain work together, cooperate with each other and work closely together. Then we will get closer and closer to the arrival of the era of high-definition surveillance.