In the field of wide-area video surveillance such as forest fire prevention, border defense, coastal defense, port, oil field, etc., long-distance and ultra-long-distance video surveillance products are used more and more widely, integrating visible light and thermal imaging observation cameras, and having fog-passing function. At night, the target detection can also be performed by means of auxiliary light source or thermal imaging. The image information has both spatial resolution and time resolution; both the information of the detected object and the information of the scene space environment; both the static information of the observation target There is also information to observe the dynamics of the target.
The system is relatively intuitive and helpful for judgment, but some problems are also found in the actual use process, such as: due to the influence of optical visibility, limited range of observations in bad weather; unable to detect the accurate orientation, geographic information, speed and other information of the moving target . Taking the ordinary civilian fishing boat radar as an example, it can identify more than 500 targets within 6 nautical miles, and calibrate the position information (latitude and longitude), navigation information (heading speed), and radar information (echo area) of the target. Compared with the optical detection method, the radar can perform a wide range of search without being affected by the optical visibility. The acquired moving target information has high accuracy, but the acquired target information is relatively abstract. If the two systems can be integrated, there will be Helps the development of wide-area video surveillance. This article will focus on the application of radar-based video linkage system.
I. Introduction <br> <br> radar targeting system based on video linkage, acquired by the radar computer system software object space / distance data and the location photoelectric turret / WAN monitoring camera rotation angle, focal length lens Linkage, real-time review of the scene image of the space and geographical location. The system consists of a positioning radar, a remote photoelectric turntable/wide-area surveillance camera, a server, system software installed on the server, and a transmission system.
The radar adopts mature products and has a secondary development SDK package. It can realize video linkage monitoring of radar detection targets by secondary development and integration of software. Compared with the conventional remote monitoring system, the radar and video linkage system has the following advantages: one is that the target detection speed is fast; the other is that multiple targets can be detected simultaneously; the third is less affected by meteorological conditions and the detection accuracy is high; Digital, networked, intelligent, and highly informatized.
The main functions of the system are: detecting and monitoring targets (people, vehicles, ships) in the range of 20Km; continuous detection of day and night; designated target motion tracking; target map marking.
Second, the principle of the system in existing mature <br> <br> system remote video surveillance, radar automatic target tracking radar technology automatically synchronized with the linkage target information through the video monitoring system, digital radar detection and distal optical apparatus, Intelligent and networked, injecting new blood into the wide-area video surveillance application.
The system consists of front-end detection equipment, signal acquisition and processing system, network transmission and analysis control system, etc. It is equipped with radar video information and video image linkage recognition, moving target tracking and monitoring, coordinate orientation, network transmission, information fusion, The multi-function information integrated system such as active warning solves the problems of slow video search speed, poor precision, and cumbersome manual control. It improves the use efficiency of the long-distance video surveillance system, improves the speed and accuracy of target search and tracking, and reduces the speed. The intensity of the work of the duty personnel has increased the value of the system.
The operating principle of the system is that the radar can search for the surrounding target information in the detection area, and the radar information processing system processes the time series radar image to automatically identify, track and correct the motion parameters of the target echoes in the image; Limited by the radar working system and working principle, the data update speed is greater than 2.4s, the accuracy of the azimuth data is lower than the accuracy of the distance data. Generally, the radar azimuth accuracy is less than 1 degree, and the distance data accuracy is within 1% of the range.
Firstly, the system uses the open SDK package of radar products to extract key data such as digitized map data and target information, and sends it to the terminal control server through the network. The server completes the corresponding calibration of the virtual scene pixel coordinates and real coordinates of the software map (general monitoring The scene of the point installation is relatively fixed, and can also be directly imported into the GIS map of the detection area).
Secondly, through the integrated high-definition camera, ultra-long-distance power zoom lens, high-precision heavy-duty wind-resistant photoelectric turntable front-end video detection and acquisition equipment, the target image is collected and encoded, and processed by the image analysis algorithm of the back-end software platform. The target that newly enters the detection range is identified, and the type of the target is given: person, car, ship, so that the virtual icon corresponding to the target type is calibrated on the software map, and the virtual icon displayed in the software map can display the real Geographic information location. For the target in the detection area, as long as the video surveillance system is covered, it can also be marked on the software map by video analysis.
Third, for the radar-locked tracking target, the system automatically inputs the position coordinates of the corresponding target into the remote photoelectric turret, and the coordinate directly corresponds to the preset point of the long-distance photoelectric turret. The motion tracking of the target adopts the method of video analysis, and the platform software drives the remote photoelectric turret to perform continuous tracking shooting, and displays the motion trajectory of the target on the software map. At the same time, the moving target real-time image will also be displayed in the software interface.
Since the remote software interface <br> <br> photovoltaic system used turntable integrated thermal imaging, the auxiliary light source, so even at night can be obtained corresponding to the target image.
Third, the application of technical analysis system <br> <br> radar detection system advantages and characteristics of the video image combined with a completely new experience through video surveillance software processing, the following listed several key application technology.
Target detection
The purpose of target detection is to identify the type of target within the precautionary area, so that different means of prevention can be adopted. The target detected by the radar is not intuitive. The video analysis method is used to segment the moving target in the video scene. After comparing with the target model, the target is distinguished, so that the display is relatively intuitive on the map.
2. The purpose of tracking <br> <br> target detection is to monitor the trajectory of the target to record, track, target type shall be reviewed to target continuous monitoring and identification details. Since the video picture may involve multiple moving targets, the video analysis algorithm is highly demanded, and the target of the radar locking is continuously and continuously tracked.
3. Hardware technology
The video image relies heavily on optical conditions. In order to prevent the meteorological and geographical conditions of the area, it is necessary to adapt the corresponding equipment according to local conditions. Due to the high-definition camera used in the system, the process requirements of the telephoto lens are high. Secondly, in the long-distance monitoring process of up to 10Km, the stability of the pan-tilt operation and the accuracy of the pan-tilt operation are very high. The accuracy of 0.5° corresponds to the distance deviation of nearly 88 meters, so the process requirements for hardware are relatively high; the equipment used is used in seaside, high mountain, etc., low pressure, high altitude, high heat and humidity, salt and alkali corrosion, etc. The hardware must have good environmental adaptability.
IV Conclusion <br> <br> China's coastline, the border is long, many ports, mountainous and hilly, mostly the construction of the current system is not integrated with the social, national emphasis on public safety, radar and video linkage system It has good market application requirements and prospects. At the same time, the system is also an important tool to improve the value of wide-area video surveillance system, the work efficiency of the personnel on duty, and the level of risk prevention. The system can also fully achieve the purpose of ensuring security.
The system is relatively intuitive and helpful for judgment, but some problems are also found in the actual use process, such as: due to the influence of optical visibility, limited range of observations in bad weather; unable to detect the accurate orientation, geographic information, speed and other information of the moving target . Taking the ordinary civilian fishing boat radar as an example, it can identify more than 500 targets within 6 nautical miles, and calibrate the position information (latitude and longitude), navigation information (heading speed), and radar information (echo area) of the target. Compared with the optical detection method, the radar can perform a wide range of search without being affected by the optical visibility. The acquired moving target information has high accuracy, but the acquired target information is relatively abstract. If the two systems can be integrated, there will be Helps the development of wide-area video surveillance. This article will focus on the application of radar-based video linkage system.
I. Introduction <br> <br> radar targeting system based on video linkage, acquired by the radar computer system software object space / distance data and the location photoelectric turret / WAN monitoring camera rotation angle, focal length lens Linkage, real-time review of the scene image of the space and geographical location. The system consists of a positioning radar, a remote photoelectric turntable/wide-area surveillance camera, a server, system software installed on the server, and a transmission system.
The radar adopts mature products and has a secondary development SDK package. It can realize video linkage monitoring of radar detection targets by secondary development and integration of software. Compared with the conventional remote monitoring system, the radar and video linkage system has the following advantages: one is that the target detection speed is fast; the other is that multiple targets can be detected simultaneously; the third is less affected by meteorological conditions and the detection accuracy is high; Digital, networked, intelligent, and highly informatized.
The main functions of the system are: detecting and monitoring targets (people, vehicles, ships) in the range of 20Km; continuous detection of day and night; designated target motion tracking; target map marking.
Second, the principle of the system in existing mature <br> <br> system remote video surveillance, radar automatic target tracking radar technology automatically synchronized with the linkage target information through the video monitoring system, digital radar detection and distal optical apparatus, Intelligent and networked, injecting new blood into the wide-area video surveillance application.
The system consists of front-end detection equipment, signal acquisition and processing system, network transmission and analysis control system, etc. It is equipped with radar video information and video image linkage recognition, moving target tracking and monitoring, coordinate orientation, network transmission, information fusion, The multi-function information integrated system such as active warning solves the problems of slow video search speed, poor precision, and cumbersome manual control. It improves the use efficiency of the long-distance video surveillance system, improves the speed and accuracy of target search and tracking, and reduces the speed. The intensity of the work of the duty personnel has increased the value of the system.
The operating principle of the system is that the radar can search for the surrounding target information in the detection area, and the radar information processing system processes the time series radar image to automatically identify, track and correct the motion parameters of the target echoes in the image; Limited by the radar working system and working principle, the data update speed is greater than 2.4s, the accuracy of the azimuth data is lower than the accuracy of the distance data. Generally, the radar azimuth accuracy is less than 1 degree, and the distance data accuracy is within 1% of the range.
Firstly, the system uses the open SDK package of radar products to extract key data such as digitized map data and target information, and sends it to the terminal control server through the network. The server completes the corresponding calibration of the virtual scene pixel coordinates and real coordinates of the software map (general monitoring The scene of the point installation is relatively fixed, and can also be directly imported into the GIS map of the detection area).
Secondly, through the integrated high-definition camera, ultra-long-distance power zoom lens, high-precision heavy-duty wind-resistant photoelectric turntable front-end video detection and acquisition equipment, the target image is collected and encoded, and processed by the image analysis algorithm of the back-end software platform. The target that newly enters the detection range is identified, and the type of the target is given: person, car, ship, so that the virtual icon corresponding to the target type is calibrated on the software map, and the virtual icon displayed in the software map can display the real Geographic information location. For the target in the detection area, as long as the video surveillance system is covered, it can also be marked on the software map by video analysis.
Third, for the radar-locked tracking target, the system automatically inputs the position coordinates of the corresponding target into the remote photoelectric turret, and the coordinate directly corresponds to the preset point of the long-distance photoelectric turret. The motion tracking of the target adopts the method of video analysis, and the platform software drives the remote photoelectric turret to perform continuous tracking shooting, and displays the motion trajectory of the target on the software map. At the same time, the moving target real-time image will also be displayed in the software interface.
Since the remote software interface <br> <br> photovoltaic system used turntable integrated thermal imaging, the auxiliary light source, so even at night can be obtained corresponding to the target image.
Third, the application of technical analysis system <br> <br> radar detection system advantages and characteristics of the video image combined with a completely new experience through video surveillance software processing, the following listed several key application technology.
Target detection
The purpose of target detection is to identify the type of target within the precautionary area, so that different means of prevention can be adopted. The target detected by the radar is not intuitive. The video analysis method is used to segment the moving target in the video scene. After comparing with the target model, the target is distinguished, so that the display is relatively intuitive on the map.
2. The purpose of tracking <br> <br> target detection is to monitor the trajectory of the target to record, track, target type shall be reviewed to target continuous monitoring and identification details. Since the video picture may involve multiple moving targets, the video analysis algorithm is highly demanded, and the target of the radar locking is continuously and continuously tracked.
3. Hardware technology
The video image relies heavily on optical conditions. In order to prevent the meteorological and geographical conditions of the area, it is necessary to adapt the corresponding equipment according to local conditions. Due to the high-definition camera used in the system, the process requirements of the telephoto lens are high. Secondly, in the long-distance monitoring process of up to 10Km, the stability of the pan-tilt operation and the accuracy of the pan-tilt operation are very high. The accuracy of 0.5° corresponds to the distance deviation of nearly 88 meters, so the process requirements for hardware are relatively high; the equipment used is used in seaside, high mountain, etc., low pressure, high altitude, high heat and humidity, salt and alkali corrosion, etc. The hardware must have good environmental adaptability.
IV Conclusion <br> <br> China's coastline, the border is long, many ports, mountainous and hilly, mostly the construction of the current system is not integrated with the social, national emphasis on public safety, radar and video linkage system It has good market application requirements and prospects. At the same time, the system is also an important tool to improve the value of wide-area video surveillance system, the work efficiency of the personnel on duty, and the level of risk prevention. The system can also fully achieve the purpose of ensuring security.
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