What does the white balance of the camera mean

1, white balance, literally means white balance. White balance is an index to describe the white accuracy of the mixed red, green and blue primary colors in the display. White balance is a very important concept in the field of TV camera shooting, through which a series of problems such as color restoration and tone processing can be solved.

2. Function:

There are usually three modes to adjust the white balance of digital cameras; Automatic white balance, step-by-step white balance setting and precise white balance setting (manual setting mode).

Different cameras have different ways to adjust the white balance. Most popular digital cameras use automatic white balance. Most quasi-professional digital cameras are equipped with grading to set the white balance.

Professional digital cameras are equipped with accurate white balance (manual setting mode). Professional digital cameras have three modes of white balance, and quasi-professional digital cameras have automatic and step-by-step setting of white balance. Can be selected according to the different needs of users.

3, the use process is as follows:

Use common non-professional standard light sources. This time, the indoor warm fluorescent lamp is quite different from the standard light source, and obvious contrast effect can be obtained. Canon G3 DC is chosen as the device because it has two sets of functions to define white balance, which can store two sets of data respectively and is convenient to use.

Shoot with grey card, white card (back of grey card), new white paper, old white paper, automatic white balance and fluorescent light mode white balance respectively. When shooting, use the gray card to measure light first, and use the M file to fix the exposure. Every photo was taken with this value.

The white side of Kodak gray card is placed on the background side of the main body to judge the accuracy of color. Using standard gray card to measure light, the white card as the background is within the linear exposure range, that is, there is no color scale overflow, which will not affect the accuracy of judgment. Each photo uses a color scale function to judge the color value in PS.

Extended data

The automatic white balance adjustment function is unique to cameras. The camera stores some optimal setting schemes of common light sources. The camera can automatically detect the color temperature of the object according to the light passing through its lens and white balance sensor, so as to judge the shooting conditions.

And select the closest tone setting, which is corrected by the color temperature correction circuit, and the white balance automatic control circuit automatically adjusts the white balance to the appropriate position. This function is called automatic white balance adjustment.

In most lighting conditions, the white balance function can be set to automatic. When the camera faces the subject, the white balance of the camera will be automatically adjusted with the different color temperatures of the illumination light without manual control.

However, like autofocus and automatic exposure, automatic white balance adjustment also has certain limitations. Ordinary cameras can normally adjust the automatic white balance under the color temperature of about 2500 K ~7000 K When the light during shooting is beyond the set range, the automatic white balance function will not work normally.

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