Gamma Correction

What is Gamma Correction?

Gamma Correction, commonly known as gamma, is a nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems. It plays a crucial role in the process of video editing and production, allowing filmmakers, influencers, and youtubers to manipulate the brightness and contrast of their footage to achieve the desired visual aesthetic.

Understanding Gamma Correction

In essence, Gamma Correction is applied to overcome the limitation of devices that are unable to produce the correct colors and intensity of light. It modifies the image to account for the fact that the human eye perceives light and color in a different way than the camera’s sensor.

Why is Gamma Correction Necessary?

Gamma Correction is necessary for a number of reasons:

  • It allows for the adjustment of an image to match the nonlinear characteristics of the human eye, resulting in a more realistic representation of light and color.
  • It compensates for the light output of a display device which is typically nonlinear.
  • It saves bandwidth. By using gamma correction, less bits are needed to represent the same amount of colors.

How Does Gamma Correction Work?

In the context of video editing, gamma correction works by altering the pixel values of an image or video, thereby changing the brightness of the pixels. The principle of gamma correction is to apply a power function to the pixel values of the image, effectively darkening or brightening the image.

Applying Gamma Correction

Applying gamma correction in video or image editing software typically involves adjusting a ‘Gamma’ slider in the color correction settings. This changes the distribution of light and dark pixels in the image, allowing for a more balanced and visually appealing image.


In conclusion, Gamma Correction is an essential tool in the world of video and image editing, allowing for a more accurate representation of light and color. While it may seem complex, understanding and utilizing Gamma Correction can significantly enhance your video and image editing skills.

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