Maybe everyone wants their family to have a superhero like Batman to protect their own homes. Maybe everyone wants to have a super doctor like Dr. X. He can also feel his own home when he is away from home. Perhaps everyone wants their home to be quiet and beautiful, and be able to enjoy their home without any infringement. As a result, in a new industry, civil security emerged. Even if human beings do not have the power to protect themselves as they do in science fiction, human beings can use their own cleverness to invent innovation tools to protect themselves. I have lived for many years, and human history is also understood. From the beginning, there is security. From the simplest use of knife spears to self-defense, to scout observations, to the current high-tech society, self-defense with firearms, and observation of the situation with advanced digital technology, this is not a big leap. Civil security has gone through so many years. Until now, digital technology has been widely used in this field, making modern people's lives more comfortable and at ease. Then, what are the main applications of modern digital technology in civil security? Today, the author takes you into the digital world of civil security and find out.
Modern security concepts focus on active defense, so-called active defense, that is, establish crisis awareness before danger comes, and take preventive measures. With the rapid development of science and technology, active defense has become possible.
Network Video Surveillance Cameras In digital technology, network video surveillance technology is the most widely used type of technology in the field of civil security. It mainly includes:
Front-end camera is mainly responsible for front-end shooting, which is the most basic hardware in this technology. Only the front-end camera enters the real-time scene, the background can be observed and analyzed, otherwise everything is free.
The decoder is responsible for decoding the transmitted digital signals to facilitate analysis in the background.
The network video surveillance host summarizes, analyzes, and generates images and videos that can be viewed on ordinary computers.
The computer serves as a background for watching videos and videos.
In the network video surveillance, it can be divided into two modes: First, the all-digital solution, the video signal is directly converted to a digital signal after the acquisition, the transmission and storage process to achieve full digital. All-digital solutions have simple wiring, but they can easily cause data loss during the compression and transmission of information data. At the same time, high network transmission requirements and unstable network conditions occur occasionally, which will affect the transmission effect. Second, the scheme of digital simulation is combined. The front end uses analog cameras to save and transmit images through hard disk recorders. The analog video signal output is directly restored from the hard disk recorder, and the video signal output can be restored through a computer on the network.
Electronic warning technology In digital technology, there is also a class of technology that is a common security measure. Compared with video surveillance, it is not visible. It is to perform alarm security by sensing the other party's intrusion behavior. It is an electronic alarm technology. It mainly includes:
The detector is mainly responsible for probing the signal.
The sensor is responsible for transmitting the alarm signal.
The alarm receives the alarm signal and alarms.
The alarm controller controls the hardware of the entire alarm process.
Electronic alarm technology is mainly divided into fixed target alarm technology and mobile target alarm technology. The fixed target alarm technology is that the detector transmits the sounding signal through the channel to the alarm control center in the duty room. After an alarm occurs in the alarm system, the security guards can take necessary measures to effectively stop the illegal invasion and destruction according to the situation. The mobile target alarm technology is a protection technology that is specifically designed to ensure the safety of important mobile objects. It comprehensively uses alarm technology, positioning technology, wireless communication technology, GIS geographic information technology and computer technology, and can be networked with public security 110, emergency 120, and traffic accident 122 to realize a wide range of mobile body security services. The mobile target alarm technology is currently used mainly for the bank transport, leader security and other important and valuable vehicles (or ships) to prevent.
Intelligent identification technology In the large family of digital security, intelligent identification technology can be described as a wonderful work. It is like a jewel, no matter what kind of dress you have, it can recognize your true body at a glance. Intelligent identification technology, as its name implies, is a technology that monitors and captures video from a front-end surveillance camera and transmits it to the back-end for detailed analysis and observation through a computer. It mainly includes:
Front-end surveillance camera for surveillance shots.
Intelligent recognition software automatically analyzes images captured by surveillance cameras.
At present, the more advanced and most widely used intelligent identification systems are vehicle number plate identification systems and face recognition systems.
The license plate recognition technology is based on digital image processing, pattern recognition, computer vision and other technologies, and analyzes the images or video sequences of the vehicles captured by the surveillance cameras to obtain the unique license plate number of each car, thereby completing the recognition process. In addition, security blacklists can be set up across security departments, public security bureaus, etc., and vehicles can be secured by multiple means. The use of this technology can realize the functions of parking charge management, traffic flow control index measurement, vehicle location, car theft prevention, super speed supervising of highway and so on. It is of practical significance to maintain traffic safety and urban security, prevent traffic jams, and realize automated traffic management. The system collects the video image captured by the camera including the license plate through the video capture interface, and then processes the dynamically acquired image to overcome the image interference, improves the recognition effect, and then automatically finds the position of the license plate in the dynamically acquired image, that is, the edge detection. , And divides out the rectangular area of ​​the single character, then carries on the binarization to the license plate, finally recognizes the regular character input character recognition system.
Face recognition technology has been researching since the early 1980s and has now achieved major breakthroughs. Face recognition refers to the use of analysis and comparison of face visual characteristics information for identity authentication. The main technologies include face image collection, face location, face recognition preprocessing, identity verification, and identity search. The system automatically records face images, can also enter face information in advance, and create a blacklist for security. Once a blacklisted person appears in the alert area, the system will automatically identify and alert. However, face recognition can affect the recognition rate due to different light sources, different viewing angles, and the natural environment. This problem has not been solved so far. Although face recognition using infrared illumination solves some problems, it is still a certain distance from full maturity. .
To sum up, modern digital technology has blossomed in the field of civilian security and has an irreplaceable position. I believe that in the future, this technology can introduce new products and introduce more new products.
Modern security concepts focus on active defense, so-called active defense, that is, establish crisis awareness before danger comes, and take preventive measures. With the rapid development of science and technology, active defense has become possible.
Network Video Surveillance Cameras In digital technology, network video surveillance technology is the most widely used type of technology in the field of civil security. It mainly includes:
Front-end camera is mainly responsible for front-end shooting, which is the most basic hardware in this technology. Only the front-end camera enters the real-time scene, the background can be observed and analyzed, otherwise everything is free.
The decoder is responsible for decoding the transmitted digital signals to facilitate analysis in the background.
The network video surveillance host summarizes, analyzes, and generates images and videos that can be viewed on ordinary computers.
The computer serves as a background for watching videos and videos.
In the network video surveillance, it can be divided into two modes: First, the all-digital solution, the video signal is directly converted to a digital signal after the acquisition, the transmission and storage process to achieve full digital. All-digital solutions have simple wiring, but they can easily cause data loss during the compression and transmission of information data. At the same time, high network transmission requirements and unstable network conditions occur occasionally, which will affect the transmission effect. Second, the scheme of digital simulation is combined. The front end uses analog cameras to save and transmit images through hard disk recorders. The analog video signal output is directly restored from the hard disk recorder, and the video signal output can be restored through a computer on the network.
Electronic warning technology In digital technology, there is also a class of technology that is a common security measure. Compared with video surveillance, it is not visible. It is to perform alarm security by sensing the other party's intrusion behavior. It is an electronic alarm technology. It mainly includes:
The detector is mainly responsible for probing the signal.
The sensor is responsible for transmitting the alarm signal.
The alarm receives the alarm signal and alarms.
The alarm controller controls the hardware of the entire alarm process.
Electronic alarm technology is mainly divided into fixed target alarm technology and mobile target alarm technology. The fixed target alarm technology is that the detector transmits the sounding signal through the channel to the alarm control center in the duty room. After an alarm occurs in the alarm system, the security guards can take necessary measures to effectively stop the illegal invasion and destruction according to the situation. The mobile target alarm technology is a protection technology that is specifically designed to ensure the safety of important mobile objects. It comprehensively uses alarm technology, positioning technology, wireless communication technology, GIS geographic information technology and computer technology, and can be networked with public security 110, emergency 120, and traffic accident 122 to realize a wide range of mobile body security services. The mobile target alarm technology is currently used mainly for the bank transport, leader security and other important and valuable vehicles (or ships) to prevent.
Intelligent identification technology In the large family of digital security, intelligent identification technology can be described as a wonderful work. It is like a jewel, no matter what kind of dress you have, it can recognize your true body at a glance. Intelligent identification technology, as its name implies, is a technology that monitors and captures video from a front-end surveillance camera and transmits it to the back-end for detailed analysis and observation through a computer. It mainly includes:
Front-end surveillance camera for surveillance shots.
Intelligent recognition software automatically analyzes images captured by surveillance cameras.
At present, the more advanced and most widely used intelligent identification systems are vehicle number plate identification systems and face recognition systems.
The license plate recognition technology is based on digital image processing, pattern recognition, computer vision and other technologies, and analyzes the images or video sequences of the vehicles captured by the surveillance cameras to obtain the unique license plate number of each car, thereby completing the recognition process. In addition, security blacklists can be set up across security departments, public security bureaus, etc., and vehicles can be secured by multiple means. The use of this technology can realize the functions of parking charge management, traffic flow control index measurement, vehicle location, car theft prevention, super speed supervising of highway and so on. It is of practical significance to maintain traffic safety and urban security, prevent traffic jams, and realize automated traffic management. The system collects the video image captured by the camera including the license plate through the video capture interface, and then processes the dynamically acquired image to overcome the image interference, improves the recognition effect, and then automatically finds the position of the license plate in the dynamically acquired image, that is, the edge detection. , And divides out the rectangular area of ​​the single character, then carries on the binarization to the license plate, finally recognizes the regular character input character recognition system.
Face recognition technology has been researching since the early 1980s and has now achieved major breakthroughs. Face recognition refers to the use of analysis and comparison of face visual characteristics information for identity authentication. The main technologies include face image collection, face location, face recognition preprocessing, identity verification, and identity search. The system automatically records face images, can also enter face information in advance, and create a blacklist for security. Once a blacklisted person appears in the alert area, the system will automatically identify and alert. However, face recognition can affect the recognition rate due to different light sources, different viewing angles, and the natural environment. This problem has not been solved so far. Although face recognition using infrared illumination solves some problems, it is still a certain distance from full maturity. .
To sum up, modern digital technology has blossomed in the field of civilian security and has an irreplaceable position. I believe that in the future, this technology can introduce new products and introduce more new products.
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