How to set backlight compensation for IP camera

Created: Sep 7, 2021 07:32:03Latest reply: Jan 30, 2022 23:22:56 841 14 11 0 0

Hi, dear!

Be sure to have proper lighting when installing the camera. If you find that the camera image is too dark, you can adjust the camera parameters to get a sharper image. These parameters include backlight compensation, HLR, and WDR, etc.

Today I will share with you what is backlight compensation, how it works, and how to set it on the IP camera.

What is backlight compensation

Briefly, backlight compensation(BLC) can effectively compensate for the darkness of the image subject when the camera is shooting in a backlight environment, making the image color clearer and the details more realistic.

While adjusting brighter areas of the image, the camera dims other areas of the image.

Try shooting your phone's camera at the sky or a light source, and the image coloring process includes backlight compensation.

BLC

How BLC works

In an environment such as strong light or strong backlight, the field of view contains a very bright area. As a result, the signal level detected by the AGC is not low(AGC, automatic gain control is an automatic control method in which the gain of the amplifier circuit is automatically adjusted according to the signal strength.). Therefore, the gain of the amplifier is very low. In this case, the image of the target to be photographed in the image is dim and has no layers.

The backlight compensation technology divides the image into several different areas, and the camera determines the gain of the AGC circuit according to the average signal level of each area. The backlight compensation technology increases the gain of the AGC amplifier, increases the amplitude of the output signal, and improves the brightness of the photographed target and the visibility of the image.

Briefly, the picture is divided into different blocks. Each block has a different exposure level, and the brightness of the picture is adjusted differently based on different weights.