What one wants to achieve is an even progression of black to white with smooth grays in between. Hue Hue is the color balance of an image. Just as on a television set where you can adjust your color, the hue ranges from a form of red to a sense of green. Somewhere in the middle, the image becomes neutral. Saturation Saturation and Intensity are closely related but have slightly different meanings.
Saturation is the overall amount of color being applied.
By turning up the red saturation of a pink image, the image may actually become red. Intensity Intensity doesn't change the color's appearance as it is increased. What they may do is become white or black but the foundation color remains pink. Gamma This is a techie term to describe what is called a function. We use this because the correction this performs is not equal to all colors or shades of gray within an image.