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What factors need to be considered when designing the system? How to choose the right front-end equipment and back-end equipment? In this article, we present recommendations that are useful for selecting a video surveillance system.
1. Does the camera have to be concealed or visible as a deterrent?
The location of the installation, as well as the scope of the monitoring, will determine whether to use a normal or hidden surveillance camera. Ordinary gun cameras are usually large in size and most conspicuous after installation. They can remind people that the area is monitored by video and shocks criminals, reducing the chance of theft. Hemispherical cameras are the best choice for concealed installations because hemispherical cameras are usually designed in a small size so that they are only palm-sized. Finally, the Cloud Billiard Camera (PTZ) is suitable for large-scale surveillance, especially suitable for office buildings, shopping centers, parking lots, etc., which can easily track targets.
2. Is the camera used indoors or outdoors?
Most surveillance cameras are now suitable for indoor and outdoor installations, and some require special considerations such as installation and waterproofing. If you are working in an extremely cold environment, you must choose a camera that supports reliable design and a built-in heater when selecting a camera. This ensures that the camera is turned on at low temperatures and works properly. If it is applied in the transportation field, it is necessary to consider using a reliable and feature-rich video surveillance solution to work reliably in extreme environments, even if the installation environment may be vibrating. Cameras that do not support outdoor installations should consider the use of a protective waterproof enclosure. In other industrial environments, such as factories, cameras also need to be protected against dust. If it is installed in the restaurant kitchen, you need to make sure that the camera can prevent smoke, and it is also applicable in places such as bars and KTV. In a special environment such as a power plant, the camera should use an explosion-proof grade of IP66 or higher, even an explosion-proof shield, an outdoor wiper, a regular cleaning camera cover, and so on.
3. What is the scope of the camera to monitor?
The extent to which the surveillance camera needs to cover determines what type of camera to use. It's a good idea to find a plan of the surveillance area and draw a camera installation sketch, analyze which camera you need to use, and how many cameras you need to use.
The dome camera is ideal for wide-area surveillance because the camera can be horizontally 360 degrees, rotated 90 degrees up and down, and supports optical magnification of details. Secondly, a high-definition panoramic camera can be used, and the panoramic camera can realize 360-degree video monitoring without dead zone and support digital rotary amplification. A panoramic camera can replace up to four traditional surveillance cameras. This means that users can build a network video surveillance system with a smaller number of cameras while effectively reducing costs.
In contrast, small-scale monitoring may only require the use of a normal surveillance camera. Of course, depending on the scope of monitoring, the network used is different. Most video surveillance only requires a local area network (LAN), while large video surveillance systems use a wide area network (WAN).
What kind of image resolution is required or what kind of details are required?
The size of the surveillance area will determine how many resolution cameras you need to use. For example, a wide range of high-definition cameras are required to ensure that the fit of image magnification does not affect image quality. In addition, smaller areas, such as offices or reception rooms, simply use a low-resolution camera. Not a high resolution camera is suitable for all situations. Instead, it's best to carefully evaluate each monitoring point and spend money wisely.
At present, the basics of the cameras are 1080P, 2 million pixels are always available, and 4 million pixels are popular.
V. What are the environmental lighting conditions?
If possible, it is best to test which camera works best under existing lighting conditions. The light received indoors and outdoors at different times of the day is not the same, not to mention the changes in each season of the year. It is important to think about where the light will come from. For example, will light be reflected from the floor?
Is there a strong background light source and glare? For some environments, such as bars, discos, flashing lights will play a role in monitoring.
Fortunately, there are a variety of different techniques to ensure that the camera captures sharp images even under different lighting conditions. Light filtering technologies such as infrared cut-off filters filter unwanted infrared light during the day to output true-color-reduced color images, relying on infrared light sources at night, and the camera can be clearly imaged in dark nights.
Star-level cameras have become popular in the night, in the almost dull environment, and prices have become more popular.
6. Is there a need for voice monitoring?
The integrated audio is collected into the video surveillance system so that security personnel can conduct voice intercom with the suspect and perform sound monitoring. In terms of video surveillance, a separate sound detection function can also be implemented, which can trigger recording or alarm. For voice monitoring, the front-end camera must use a camera with a built-in microphone and speaker, or a camera with an audio input and output interface. Also the backend recorder or client must be able to connect to the microphone and speakers.
VII. Does it support scalability? With time, do you want to add more cameras to the video surveillance system?
The flexibility and scalability of video surveillance systems is very important. The traditional closed-circuit monitoring system transmits in closed lines, meaning that all equipment must be wired and not easily expandable. This is a shortcoming of analog closed-circuit monitoring systems.
So it's best to choose a webcam to add cameras and expand your system over a wireless network. Like a VOIP network, it is very easy and does not require changes to the line or updates to the line.
What are the benefits of business through effective video surveillance?
The benefits of video surveillance systems are not only for monitoring thieves, but also for protecting employees' safety and investigating incidents. Employees know that they are being monitored by video and usually feel safer and work lazy.
Video recordings provided by the surveillance system can be used for event confirmation, such as theft, violent incidents in the workplace, property damage and damage. This information is essential when suing for compensation or law enforcement reporting. However, having a good video surveillance system can bring not only the benefits of security and monitoring, but also the benefits of business operations and analytics.
In some industries, such as retail. The video surveillance system can provide useful data and customer information not only in the security department, but also can provide valuable customer information by marketing, customer service, IT and other departments, thereby greatly improving customer experience and profitability.
For example, the marketing department can rationally arrange products by sharing and analyzing the movement trajectories of customers in the store, and using the face recognition technology of video surveillance to classify customers by age and gender. These features allow shopkeepers to not only better understand their customers' profiles, but also enable targeted advertising to help showcase the most relevant products for their target market.
IX. What are the difficulties in video surveillance that need to be overcome? Is VMS software analysis useful?
A useful video management system is necessary because security personnel usually watch surveillance videos for up to 20 minutes. If you use a video management system, or built-in video analysis function, when a suspicious event occurs, the first time to notify you, greatly improving the efficiency of video surveillance.
Built-in motion detection and a variety of intelligent algorithms provide practical, actionable information such as how many people walk into the store. Compared to turnover, retailers can evaluate sales conversion rates during normal and holiday promotions.
X. How to choose the right video management system?
First of all, you need to know what requirements you have for the video surveillance management system. For example, how do you plan to use the video management system? Be sure to know how to use it before you buy it. The reason you drive your video management system is that the system meets all the requirements of your video surveillance system.
For example, if a user travels frequently or has multiple monitoring points to manage, the VMS video management system must be accessible to the user from anywhere. Each different video management system should provide dedicated customization capabilities for users or applications.
eleven. Who do you choose for analog monitoring and network monitoring?
Now analog monitoring is basically eliminated, and the cost of analog monitoring and digital monitoring is not much different. The digital monitoring construction is simpler, the definition is higher, the expansion is easy, the integration with other systems is convenient, and the digital camera is now more powerful. Perception, recognition, analysis, etc., the main contributor to the era of big data video is digital surveillance.
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