Understanding of the relationship between camera setting color temperature value and actual environment color temperature value and reverse compensation

color temperature refers to the temperature of a color, which is also commonly called the color of light. The low color temperature is yellow and the high color temperature is blue.

in terms of the color temperature of the sun, the value of a day is low color temperature of 32K and yellow in the morning. From morning to afternoon, the color temperature is high, 56K, cyan.

The actual color temperature is a kind of environment. If a SLR camera wants to restore the shot picture correctly, it must choose the same color temperature parameters as the environment color temperature.

in other words, in order to restore normally, the SLR needs to set a color temperature value that is the same as the environment.

human eyes have a natural instinct to recognize light automatically. But there is no camera. This requires camera parameters to improve the photos taken. The color temperature in the camera is that the lower the value, the bluer and colder the photos are. The echo compensation means that when the ambient color temperature is very low, for example, when taking photos under a family fluorescent lamp, people's eyes will automatically adjust, but the camera will not. Taking pictures with normal color temperature will make the whole picture blue, so it is necessary to raise the color temperature value to make the photos less blue. This is called reverse compensation!