What method can be used to change the backlight compensation of the camera?

Cameras are very common in our lives, so what methods can be used to change the backlight compensation of the camera is the key content that I will explain to you. As people's living standards improve, people pay more and more attention to their own safety issues, so the camera has already It is widely used in large, medium and small cities. Here are some ways to change the camera backlight compensation.

By adjusting the installation position, improving the backlighting phenomenon, by adjusting the installation position of the entrance and exit camera, and avoiding direct sunlight from the outside, it can greatly improve the backlighting of the entrance and exit. For example, Shanghai Huating Hotel installed one on each side of the entrance and exit of the hall. A camera monitors the entry and exit personnel; ICBC Shanghai Branch will monitor the camera at the entrance and exit, so that the lens of the camera is facing the person who walks out of the outlet (in the case of serious backlighting, the installation method is better than installing the camera opposite the entrance and exit.) It should be good, but it should be noted that if the above flip-chip method is adopted, if there are more than 2 entrances and exits on one outlet, the installation direction of the camera should be the same, otherwise there will be preventive loopholes). They all solve the problem of backlighting better. There are many outlets now, the business hall is not large in size, and some entrances and exits are cash counter areas. There are not many locations for camera installation. In this case, we need to pay attention to solve the installation location problem and try to avoid The camera is installed at the entrance and exit. We say that the camera is installed at the entrance. It does not specify which position the camera for monitoring the entrance and exit must be installed. It should be important to see the effect and see the physical quality.

Improving the backlighting effect by selecting a camera with corresponding functions Selecting a hyperdynamic camera or a camera with background compensation function is also a method to improve the backlight of the entrance and exit. Generally, the camera has AGC (Automatic Gain Control) function, that is, there is a strong and weak signal to automatically increase the internal amplification gain of the camera, and the strong signal automatically reduces the internal amplifier gain of the camera, so that the final output signal does not change substantially with the change of the input signal, and the output The signal amplitude remains basically the same, but the automatic adjustment function of the general camera is limited. Once a strong signal (such as a strong backlight) occurs, the amplifier is saturated. Without automatic adjustment, a white spot with blurred edges (backlighting phenomenon) appears on the monitor screen. The super dynamic camera automatically adjusts to a larger range than a normal camera. We can feel through practice that when a target object with a rich picture level appears in the scene, when the target object is taken by an ordinary camera, the obtained picture has many levels, so the problem of backlighting with a large contrast of the super-motion camera is selected. Can also play a certain improvement role. The backlighting phenomenon at the entrance and exit is often a very bright background and a very dark foreground target in the scene, and the position of the background and the target remains basically unchanged. The camera with BLC function (backlight compensation function) can be used only. An area is averaged to determine the AGC operating point. If the foreground target is located in the area, the clarity of the foreground target is expected to increase.

By improving the illumination of the indoor light source, the backlight phenomenon is improved. By improving the illumination of the indoor light source, it is also a way to improve the backlight phenomenon, and the image appears to have a backlight phenomenon, which is mainly caused by the contrast of the light intensity of the field of view. The camera installed at the entrance and exit has strong outdoor light in the monitoring range, and the indoor light is weak, which forms a black-and-white contrast of the image. Thus, if the illuminance of the indoor light source is increased, the indoor light is enhanced. Reducing the contrast with the outside light can also improve the backlighting phenomenon. To improve or reduce the backlighting of the entrance and exit, there are some other auxiliary methods, such as laying some carpets on the ground, preventing the reflection of the ground light, windows in the vicinity of the entrance and exit, shielding the direct sunlight with curtains, etc., all of which are helpful to improve the backlighting phenomenon. method. The backlighting phenomenon at the entrance and exit is a prominent problem, and the solution to this problem has not yet found one of the most thorough and effective methods. The three methods described above have a certain effect on improving the backlighting phenomenon. Combined application.