gammacorrection

Gammacorrection is a technique used to adjust the brightness and contrast of an image or video. It is named after the gamma function, which describes the relationship between the luminance of a color and its corresponding voltage. The gamma value is typically between 0 and 1, with 1 representing a linear relationship. In digital imaging, gamma correction is used to compensate for the non-linear response of display devices, such as monitors and televisions.

The process of gamma correction involves applying a power law transformation to the pixel values of an image. This transformation can be expressed as:

L_out = L_in^gamma

where L_out is the corrected luminance, L_in is the original luminance, and gamma is the correction factor. The gamma value is usually chosen based on the characteristics of the display device and the desired visual appearance.

Gamma correction is commonly used in photography, video production, and computer graphics to achieve a more natural and visually pleasing image. It is also used in image processing algorithms to improve the quality of images and videos.

In summary, gamma correction is a technique used to adjust the brightness and contrast of an image or video. It is based on the gamma function and is used to compensate for the non-linear response of display devices. The process involves applying a power law transformation to the pixel values of an image, and the gamma value is chosen based on the characteristics of the display device and the desired visual appearance.