Classification of video surveillance:

1. Object recognition

It can distinguish the category of moving objects, such as cars, motorcycles, people and airplanes, which is the basis of other recognition.

2. Cross-boundary recognition

By artificially drawing a line or curve on the video screen, the behavior of an object crossing this boundary can be recognized.

3. Trajectory Tracking

After identifying the moving object, you can draw the trajectory of its movement through the place behind the moving element.

4. Lost property identification

The equipment can identify that there is one more or one less object in the visual field, which is suitable for warehouses, stations, exhibition halls, security checks and other places. If a backpack is lost in a certain place for a long time and no one picks it up, the system will give an alarm, or in places like exhibition halls, if one of the exhibits is missing, the equipment can also find and give an alarm.

5. License plate recognition

If the video scene is a road entrance or a residential entrance; As long as the license plate area has appeared in the video, the device can automatically identify the license plate number; And prompt the user by text.

6. Vehicle speed measurement

Knowing that the actual distance between these two lines is 111M, the equipment can automatically calculate the speed of each passing vehicle and give an alarm immediately when speeding.

7. Traffic statistics

Intelligent devices can identify pedestrians and vehicles passing by and count the number of people or vehicles passing by.

8. Retrograde alarm

One-way street, or the exit or entrance of a station or airport, the traffic and people flow in one direction. Once someone goes retrograde, the system will automatically identify it and generate an alarm.

9. Graffiti Recognition

With the intelligent monitoring system and equipment, such graffiti behavior can be found in time, and an alarm can be given in time.

11. Behavior recognition

Abnormal behaviors of people or vehicles, such as sudden running, falling, chasing and so on, can be found in time by the system, and managers will be reminded.

Extended materials:

Advantages of video monitoring:

First, it is convenient for computer processing. Because the video image is digitized, it can be compressed, analyzed, stored and displayed by making full use of the fast processing ability of the computer. Through video analysis, we can find the abnormal situation in time and give a linkage alarm, so as to realize unattended operation.

second, it is suitable for long-distance transmission. Digital information has strong anti-interference ability, is not easily affected by the attenuation of transmission line signals, and can be transmitted in encryption, so it can monitor the scene in real time thousands of kilometers away. Especially when the site environment is bad or it is not convenient to go deep into the site directly, digital video monitoring can achieve the effect of visiting the site in person. Even if the scene is destroyed, the real record of the scene can still be obtained in the distance.

thirdly, it is easy to find. In the traditional analog monitoring system, when there is a problem, it takes a lot of time to watch the video tape to find the on-site record; In the digital video surveillance system, the corresponding on-site records can be found in a few minutes by using the index established by the computer.

Fourthly, the image quality and monitoring efficiency are improved. The computer can be used to denoise and sharpen unclear images. By adjusting the image size and with the help of the high resolution of the display, you can watch clear and high-quality images. In addition, you can watch 16 or even 32 video images on one monitor at the same time.

fifth, the system is easy to manage and maintain. Digital video monitoring system is mainly composed of electronic equipment, which has high integration, and video transmission can use wired or wireless channels. In this way, the whole system is modular in structure, small in size and easy to install, use and maintain.

Baidu encyclopedia-video surveillance