At present, the new generation of security systems, such as “Safe Cityâ€, have clearly required high definition. The government, public security, transportation, banking and other industries are already high-definition applications. In the future, more and more industries will introduce HD. Demand. Intelligent video analysis technology is the development direction of video surveillance in the future, and is the highest-end application mode in the field of video surveillance. At present, the intelligent video surveillance system has been widely applied in foreign markets, and the domestic intelligent analysis and monitoring market is also growing rapidly.
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This article will be combined with a domestic FullHD1080P real-time COMS network camera as an example.
The network camera is embedded with the intelligent analysis technology of VCA in the UK (VCA intelligent analysis technology is embedded in the front-end DSP). The intelligent video analysis technology VCA (VideoContentAnalysis) is different from the traditional VMD (VideoMotion Detection) dependent pixel change detection motion, and its principle is based on the artificial intelligence AI (Artificial Intelligent) technology of computer vision CV (ComputerVision) technology (see Figure 1). It establishes a mapping relationship between the target and the background description, and analyzes and processes the digital image to understand the behavioral characteristics of various targets in the video image. Intelligent video analysis records the moving trajectory and feature information (such as size, speed, direction, etc.) of the target by tracking and recognizing the moving target, and then analyzes whether these behaviors match the previously defined detection rules in real time, thereby issuing an alarm. Prompt for manual intervention.
The camera's intelligent analysis function supports advanced intelligent analysis functions such as intrusion detection, flaw detection, trailing detection, stop detection, direction detection, classification detection, abandoned objects and moving object detection, indoor high-density character tracking, high-precision bidirectional counting, color recognition, etc. It has the characteristics of high detection efficiency, low false alarm rate and strong timeliness. It can be widely used in community security and prevention, intelligent traffic management, flow control, military, and security in public places such as banks, shopping malls, subways, airports, etc. It can also be applied to non-security areas, such as retail establishments, to provide relevant statistical information for business decisions.
Intelligent analysis function
Intrusion detection
This is the most widely used feature in intelligent video analysis cases.
Suspicious objects entering, leaving, appearing, and disappearing in the area are automatically detected and alarmed in time. For example, airports, railways, ports, borders, or other areas that are prohibited from entering.
For scenes with scattered perimeters and complex environments, one or more people cannot fully monitor all perimeters, and in the case of criminal associates among security personnel, the functional module can fully meet the requirements, and it can automatically detect the plan. Suspicious objects that trigger rules in the area and alert in time.
Vehicle detection
Use stop, direction, and speed to filter detection rules.
In highways, customs import and export, urban trunk roads, parking lots, etc., the use of VCA's vehicle detection function can make it easier to manage parking and maintain traffic regulations, and greatly reduce traffic accidents caused by overspeed and illegal parking.
The no-parking area can be calibrated in the camera. If a vehicle stops in this area, an alarm will be triggered to remind the management to take relevant measures. At the same time, VMS (Video Management System) can also use the index information generated by the VCA to quickly locate relevant videos for later forensics.
The vehicle detection function supports setting various areas, such as parking area, pedestrian area, and bus lanes, and can detect reverse driving and overspeed driving.
徘徊 detection
Squares, shopping malls, parking lots, access control systems, bank 24-hour ATM machines, sensitive areas, and other areas, if suspicious personnel are found to be stranded, staying for a long time, or when someone is suspicious near schools or kindergartens, the functional module can be based on The retention time tracks and alerts the moving target.
Trailing detection
The trailing rule can monitor whether there is someone behind the moving object or the vehicle tracking, effectively protecting the security of the object and the confidentiality requirements of the specific place. For example, if a public official who is used in a prison or detention center leaves the surveillance area, there is a trailing behavior behind it, and it can also be used for bank debit vehicles, schools, and places that require special monitoring.
Abandonment detection
In the areas where there are large traffic areas such as airports and subway stations, some people have left the “package†or some ATMs installed in front of the bank ATM machine. The function module can detect the target object in time and will immediately issue an alarm.
Item removal detection
The item moving detection module can automatically detect the item moving event - an alarm is issued when the item in the detection area is taken away or removed.
This test module is suitable for occasions where it is necessary to record or alarm the movement of items, such as high-priced goods in supermarkets, computers and furniture in the home, metal building materials in factories, cultural relics in museums, cars and valuable equipment in garages, The theft of specific places, such as exhibits in the exhibition hall, is monitored and tracked. It is found that someone can detect and trigger an alarm in time when moving or removing items.
Target statistics
It can count the traffic of supermarkets, highways, station squares, school examination halls, bank halls, hospital charges, gold advertisements, etc., and support two-way separate counting.
This function module can accurately count the number of people or vehicles, especially in the outdoor support "elimination of shadow effects", support cumulative increase, cumulative reduction and timely counting and other counting modes.
Counting report function
The database is integrated into the camera, automatically records statistical data and achieves local storage. It can report statistical data according to different sampling frequencies such as 1 minute, 10 minutes, 1 hour, 24 hours, etc. It supports multiple data query modes and can work completely offline. Support multiple data report forms, such as web form, color strip chart and export Excel form, and further process the exported Excel form, and the data is updated in real time.
Color filtering
Color detection rules are one of the latest features in the device's smart analytics application and can be used under PeopleTrack licenses to provide 10 detection colors: black, brown, dark green, blue, green, sky blue, red, pink, Yellow, white. Supports the object's color percentage setting and color pie chart display.
Widely used in workplaces with color requirements, such as: hospitals, detention centers, political and legal institutions, prisons and other specific occasions.
Fireworks detection
The pyrotechnics detection rule is also the latest rule in the intelligent analysis application of the device. Currently, only the test version is provided. After the official version is exited, an independent pyrotechnic detection rule will be provided. It can detect hidden dangers such as smoke, fire and white gas in video scenes, and is widely used in factories, warehouses, waiting rooms, waiting rooms, commercial places, forest fire prevention, petrochemical industries, etc.
3D calibration function
In the 3D calibration process, the character model is compared and the operation is intuitive. Only a simple three-step calibration is required. After calibration, the classification, area, speed and height of the object can be displayed, and the objects in the scene can be classified to improve the accuracy of target detection.
Applications
Unattended substation
As an important part of power transmission, substations are unattended and important equipment is often stolen or destroyed, which poses a major hidden danger to the safe operation of the entire power grid. It is very important to ensure the safe operation of substations.
The smart analysis features applied to this project are:
Prevent equipment such as outdoor transformers from being stolen or destroyed;
Prevent people or large animals from entering the danger zone;
Prevent theft or destruction of important equipment in the room;
Greatly improved the accuracy of the alarm, and reduced the false positive rate;
The event will be alarmed in time and the monitoring center will be notified;
Retain strong evidence on the scene of the incident;
In this technical solution, the detection rules mainly used to complete the protection of the substation are: object classification, intrusion detection, video loss, item theft, detention detection, and flaw detection.
smart transportation
The traffic control department needs to effectively realize the automatic detection of traffic violations and emergencies and the automatic statistics of traffic flow, and according to various actual road surfaces such as urban intersections, urban roads, expressways, highways, security bayonet, tunnels, bridges and parking lots. The environment is designed with optimized solutions to meet the reliable work of 7×24 hours in all kinds of environments.
At the same time, in special circumstances, timely and effective scheduling and deployment are needed to improve the safety and stability of the transportation system.
The rules that the smart camera applies to in intelligent transportation are:
Retrograde detection: The direction detection in the intelligent analysis algorithm is used to detect whether the vehicle is retrograde, and once it is found, it will automatically alarm to prevent the accident from happening.
Parking violation: Check whether the city vehicle is illegally parked to ensure the standardization of the road.
Abandonment detection: timely detection of the remnants of traffic affecting the road to ensure smooth roads.
Traffic statistics: Traffic statistics for road vehicles.
Speed ​​detection: Monitor the speed of vehicles on the highway.
After using the intelligent analysis product, the probability of occurrence of the relevant road section accident is significantly reduced, and the personnel cost is effectively reduced, and the traffic standardization is improved.
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