Public places camera monitoring applications need to pay attention to what?

Surveillance cameras are an important tool for protecting assets and public facilities. Apply a popular ad phrase "whatyouseeiswhatyouget" to see what you get. Effective and reasonable setting of surveillance cameras can help you solve a lot of things, especially the current HD surveillance cameras. Adjusting the angle of the camera will allow you to do more with less.

Security engineers said that the field of vision that the surveillance camera sees is that two beams of light pass through the center of the lens to form a square image, and the two light beams fall on the opposite corners of the square. Conceptually defined is the composition of two lines with vertical and horizontal components. Surveillance camera imaging may seem simple, but the mistakes must be avoided.

1, forget to observe the monitoring of the surrounding environment
When installing surveillance cameras, it is necessary to pay attention to whether the monitoring scene is an independent variable. Through practice, the surrounding environment has played a vital role in setting up surveillance cameras. You need to consider detecting scenes, blind spots, field variables, and more extreme situations. Due to people's dependence on zoom lenses, this problem is often overlooked. In fact, camera misadjustment or scene problems can be automatically adjusted through the zoom function. In fact, this concept is wrong.

Users should consider the following when setting up. First, fix the scene and set other variables. Find a professional measurement tool to calculate the viewing angle range and measure the monitoring system wiring. Second, we must conduct actual verification. Turn on the video channel of the entire surveillance system, view the camera overlap and the covered blind spot to define the viewing angle. This is to allow you some room for maneuver after the system is installed. Of course, the complexity of different monitoring sites is not the same, and you cannot expect a zoom lens to take over what you control.

2. The principle of monitoring is equal to the principle of photography

Beginner photography classes, teachers will teach everyone how to compose pictures. The rule is: two-thirds of the site is given to the ground and themes, and one-third is left to the sky. The function of surveillance camera snapping images is almost the same as the camera, but in the field of security, such compositional principles are meaningless. Have you seen which surveillance camera captured the sky? What value does this have?

For the surveillance camera can not have a more profound truth against the sky. First of all, sunrise and sunset appearing in the sky will cause glare. At this time, the monitoring imaging will become white. Second, the color of the sky cannot be a single color. If there are natural wonders such as burning cloud, then you are wasting your video. The storage space also occupies one-third of your network bandwidth. Finally, if there are sky elements in the framing, you lose the reference point. In practical applications, ensure that there is enough space in the lens imaging to detect the vertical and horizontal areas.

Of course, here is not to tell everyone that all monitoring screens do not appear in the sky. You have to decide according to actual needs. As a general rule, leaving 10% of soy sauce is enough. Special note, if your surveillance camera is used with an electronic fence, it is necessary to give some space to the sky.

3, the monitoring system only handles daytime work

In monitoring the construction site, many people chose to leave in a hurry to get home before dark. But really responsible monitoring or engineering must help test the situation at night. In the process of designing the monitoring scheme, some issues should be considered in the low-light environment: infrared lighting, thermal imaging cameras, etc.

In the real environment, there will be some unexpected problems. Such as street lights, periodic light sources, sunrise and sunset, reflected light (water or glass), etc. On the bright side, these lights can provide enough light for night-vision monitoring without affecting the monitoring; but from a bad point of view, these light sources can destroy your images in various ways, in order to avoid The situation happens, it is important that you must know where they are. If you are too lazy to observe these lighting problems at night, then the risk lurks in monitoring at any time.

4, only consider the surveillance camera

In fact, through the above analysis we have already got a preliminary understanding of the monitoring light source. When setting up a surveillance camera, do not only consider the performance of the unit, but also adjust it with some external light sources. Especially when monitoring at night, whether you use infrared or white light, it is not the camera's field of vision that is the ultimate aspect of surveillance, but the view of infrared or visible light sources. If you don't figure this out, it's very likely that the night vision monitor will get a black picture. If the night vision monitoring is as clear as white, then you need to determine that the supply beam is larger than the camera's field of view.

Most of the lights can be adjusted according to the needs of the camera, or the light intensity or lighting angle problem. In order to be able to capture the best image at a reasonable time, you have to look at the night when debugging the camera, otherwise your camera becomes a "winkhole."

5, do not understand the intention of pixel dilution

The intention of pixel dilution is to obtain more image information, which is presented by a single pixel after amplification. This problem is generally used to solve the open scene monitoring, camera lens can accommodate a wider field of view. In order to obtain more effective information, why not expand the lens capture range? Answer: It is not determined by it.

The first thing to understand is that the camera provides users with a certain number of pixels that reflect the effective video information. Changing the lens can provide a wider view, but it does not provide more pixels. In other words, if you choose wide-angle capture, the image quality is bound to decrease because the pixels are constant. The image will be lost during transmission and the pixel dilution will be sparse. Therefore, the color must not be a 100% real contrast chart.

6. What is the big field of vision monitoring for?

In addition to setting the basic parameters of the camera, few people can find its hidden features. As the resolution of the camera becomes higher and higher, the responsibility it assumes will increase. From a long-term perspective, if you can provide the camera with a wider field of vision, its intelligent detection function can also be fully utilized; this helps avoid occlusion, better understand the target and track potential trajectories.

The above six points help you solve some of the problems that users may have during daily monitoring. Although it is not a profound application of skills, but also hope to help users accumulate some experience. Seemingly simple monitoring actually has a lot of knowledge, which is why many people want to participate in the security industry across borders, but they have not studied deeply. From Xiaobai to experts, these monitoring skills are indispensable.