The Security Camera has many functions and the Backlight Compensation function is one of them. So what is the Backlight Compensation of the Security Camera (which includes the Bullet Fixed Focus Camera, Bullet Fixed Focus CMOS Camera, Bullet Fixed Focus Webcam, HD Bullet Fixed Focus CCTV Camera, Fixed Focus Bullet Webcam Outdoor, Infrared Fixed Focus Bullet Cameras...)? The definition of the Backlight Compensation The Backlight Compensation, also called the BLC, can divide the picture into several different areas to make each area exposed separately. In some applications, the field of view may contain a very bright area, and the contained subject is surrounded by the bright field, so the picture will be dim and has no layers. At this time, the gain of the amplifier will be very low because the signal level detected by the AGC is not low; which can't improve the brightness of the main body of the picture. While, when the backlight compensation function is applied to the Security Camera, the camera can just detects a sub-region of the entire field of view to get the average signal level in this area, and then the operating point of the AGC circuit can be determined; which can help improve the picture quality under the backlight. The features of the Backlight Compensation
1. Backlight compensation can provide the ideal exposure for the target under very strong background light, no matter which position on the screen the main target is moved to, such as the the center, up, down, left, or right... 2. Backlight compensation can effectively compensate the defect that the main body of the picture is dark when the camera is shooting in the backlight environment. 3. When the camera is shooting in the backlight environment, a black image will appear on the screen. However, the backlight environment is unavoidable in security field, so the Backlight Compensation is required at this time. When the backlight compensation function is applied to the Security Camera, if the camera detects that the video level in an area of the captured image is relatively low, we can make the image overall Clear and bright; by improving the AGC circuit described above to increase the video level of the area and the amplitude of the output video signal. If the subject we want to see appears dim due to the bright background, we can set BLC to ON to compensate for the strong backlight. Simply speaking, even under the weak light environment in dark background area, a clearer picture can also be ontained. All in all, the Backlight Compensation is a very useful function, which makes the camera can also take clarified photos under the environment without the good light condition.
