Auto White Balance

Auto White Balance command automatically adjusts the black point and white point in an image. This clips a portion of the shadows and highlights in each channel and maps the lightest and darkest pixels in each color channel to pure white (level 255) and pure black (level 0). The intermediate pixel values are redistributed proportionally. As a result, the usage of Auto White Balance tool increases the contrast of an image as the pixel values are expanded (unlike being compressed, as in lower contrast images). As Auto White Balance adjusts each color channel individually, it may remove color or introduce color casts.

Auto White Balance gives good results in certain images with an average distribution of pixel values that need a simple increase in contrast.

To use the Auto White Balance command:

Choose Image > Adjustments > Auto White Balance.