LiftGammaGain

LiftGammaGain is a term used in digital image processing and video editing to adjust the luminance of specific tonal ranges within an image. It is often found in color grading software and refers to a control that allows users to selectively brighten or darken the midtones of an image without significantly affecting the highlights or shadows.

The "Lift" component of the control typically affects the darkest parts of the image, while the "Gain" component influences the brightest parts. The "Gamma" adjustment sits in the middle, primarily targeting the midtones. By manipulating these three parameters, editors can precisely control the overall brightness and contrast of an image.

LiftGammaGain controls are particularly useful for correcting exposure issues, enhancing detail in specific areas, or achieving a desired mood and aesthetic. For example, increasing the gamma can brighten a dull image, making it appear more vibrant. Conversely, decreasing gamma can add depth and drama by darkening the midtones. This granular control allows for nuanced adjustments that might not be possible with simpler brightness or contrast sliders. It is a fundamental tool for achieving professional-looking color grades.