Gamma Correction is a technique for adjusting brightness in digital images or videos. This technique is used to reproduce the correct level of brightness, taking into account human visual characteristics, and to correct the contrast and color of the image.

Gamma correction is mainly performed by applying curves that convert pixel values. This curve maps input pixel values to output pixel values. Specifically, you adjust the brightness of the output pixel value using a gamma value that represents the brightness of the input pixel value.

The human visual system accepts different senses of brightness in bright and dark areas. Therefore, linear conversion of pixel values in digital images or videos can lead to brightness differences that do not match human vision. To compensate for this, use gamma correction.

Gamma correction mainly uses gamma values such as 2.2 or 2.4. This determines the shape of the gamma correction curve and is used to convert input pixel values and output pixel values. Gamma values perform nonlinear transformations of pixel values to adjust the contrast ratio between bright and dark areas and to correct the color accurately.

Gamma calibration is used in a variety of applications, including display devices, image editing software, and video editing systems. This enables accurate brightness adjustment for correct contrast ratio and color reproduction, and improves the visual quality of images or videos.