What does camera gain do?

In simple terms, gain can be understood as increasing the brightness of the shooting image. Generally, you will choose to use gain when the light is weak, but due to noise, it is usually not recommended to use gain when you can do without it.

The video signal output by the camera must reach the standard level specified by television transmission, that is, in order to be able to output a standard video signal under different scene illumination conditions, the gain of the amplifier must be able to operate at a large Adjust within the range.

This gain adjustment is usually done automatically by detecting the average level of the video signal. The circuit that implements this function is called an automatic gain control circuit, or AGC circuit for short. Cameras with AGC function will have improved sensitivity in low illumination, but the noise will also be more obvious at this time. This is because the signal and noise are amplified simultaneously.

Extended information

How to use cameras

Cameras are very sophisticated and expensive equipment. Always pay attention to their safety when using them. When you go out to shoot, you must have a complete and safe packaging box. If you are transporting it by long-distance car, be sure to place the camera equipment in the front of the car to minimize the vibration of the machine. The following are the methods of use and maintenance:

1. Protect the LCD screen. During use, the LCD screen of a digital camera may be stained with fingerprints or dirt that is difficult to wipe off. In addition to using a soft cloth In addition to light wiping, you can also apply a transparent protective film to prevent the screen from being scratched more effectively.

2. When the camera crew is snapping shots, they should pay attention to the connection between the cable and the video recorder. Never run away with the machine and ignore the fact that the cable is still connected to the video recorder to prevent the cable from tearing over the video recorder or The connection in the camera cable was torn off due to excessive force.

3. The camera should be protected from rain. Avoid using the camera in places with humidity, high temperature, scratching the lens with sharp objects, large dust and strong magnetic fields. These factors will cause a lot of damage to the camera or cause machine failure.

4. Since most cameras use camera tubes, long-term exposure to light or strong reflections may cause the camera tube to burn out. When using the camera, do not face the lights and the sun, let alone focus on them, to avoid this loss.