Why do I need to adjust the "white balance" when taking pictures?

White balance literally means white balance.

The reason why people's eyes see some objects as white is because people's brains can detect and look more like this color change, so the color of white objects that people see remains unchanged whether in the sun, cloudy days, indoors or under fluorescence. The human eye can adapt itself, but digital cameras do not have such intelligent functions. This is because the CCD photosensitive element itself does not have this adaptive function. In order to approach the human visual standard, digital cameras must imitate the human brain and adjust the color according to the light, that is, the white balance needs to be adjusted automatically or manually to achieve satisfactory color. The white balance sensor of digital camera is generally located under the lens, which can automatically sense the surrounding environment and adjust the color balance.

The function of white balance has brought us a lot of convenience and unexpected effects in photography. For example, during the day, you can shoot the effect of the night, so that the cool colors at night create a gloomy atmosphere and the warm colors create a warm scene.