Auto Contrast

Auto Contrast command adjusts the overall contrast and mixture of colors of RGB image automatically. As it does not adjust channels individually, Auto Contrast does not introduce or remove color casts. It clips the shadow and highlight values in an image and then maps the remaining lightest and darkest pixels of the image to pure white (level 255) and pure black (level 0). This makes the highlights appear lighter and shadows appear darker.

Auto Contrast can improve the appearance of many photographic or continuous-tone images. ItÜdoes not improve flat-color images.

To use the Auto Contrast command:

Choose Image > Adjustments > Auto Contrast. The application of Auto Contrast is automatic with this option.