Adjust Brightness, Contrast and Gamma

This light adjustment changes three components of the image to correct the light values of an image.

To adjust the light levels of an image:

  1. Do one of the following:

  2. In the Adjust dialog box, set the Brightness, Contrast and Gamma options for the image.

  3. Click the Proof button to view a preview in the Main Display area.  Change the setting as you like.

  4. Click OK.

Brightness

Changes the light level for the whole image.  A value of 100 makes the image white and a value of -100 makes the image black.

Contrast

Changes the brightness levels for different areas of the image.   Increasing contrast makes shadowed areas darker, colored areas brighter with midtones remaining the same. Decreasing the contrast makes all colors closer to the midtone values of the image.

Gamma

Changes the amount of light that is applied to the image.  Higher values are brighter, lower values are darker.