Brightness, Contrast, Gamma Correction

Alters the brightness, contrast, and gamma of an image.

• Step Name—Name to give the step.
• Brightness—Brightness of the image. Brightness is expressed in gray levels, centered at 128. Higher values (up to 255) result in a brighter image, and lower values (down to 0) result in a darker image.
• Contrast—Contrast of the image, expressed as an angle. A value of 45° specifies no change in contrast. Higher values (up to 89°) increase contrast, and lower value (down to 1°) decrease contrast.
• Gamma—Gamma value used in Gamma Correction. The higher the Gamma coefficient, the stronger the intensity correction.
• Lookup Table—Displays the lookup table with the specified settings of Brightness, Contrast, and Gamma.
• Color Plane—Specifies the color plane to which you want to apply the transform.

  Note  This parameter appears only when an RGB (color) image is loaded.

• Reset—Reverts Brightness, Contrast, and Gamma to neutral default settings.