Gamma in the display is an important parameter that describes the nonlinear relationship between the color value of the display input signal and the luminous brightness.
Specifically, the gamma value defines the exponential relationship between the input signal strength and the output brightness, that is, the output brightness is a function of the gamma power of the input signal strength (output = input ^ gamma).
The role of gamma
1. Compensate for human eye perception: The human eye's perception of brightness is not linear. As the brightness increases, the human eye's sensitivity to brightness changes gradually decreases. Gamma correction is to compensate for this nonlinear perception, making the image displayed on the display closer to the brightness actually felt by the human eye.
2. Optimize image quality: By adjusting the gamma value, the grayscale brightness value of the middle tone of the image can be affected, thereby changing the middle level of the image. Appropriate gamma value settings can increase the details and layering of the image, making the image look more natural and comfortable.
3. Unify display standards: In the field of digital image processing and display, gamma value is an important standardized parameter. By setting a unified gamma value standard (such as sRGB and AdobeRGB color standards are based on a gamma value of 2.2), the consistency and accuracy of displayed images between different devices and displays can be ensured.
Gamma value adjustment
The gamma value adjustment usually needs to be completed through the display setting menu or professional calibration software. When adjusting, it is necessary to select the appropriate gamma value according to the specific model and characteristics of the display, as well as personal visual preferences. Generally speaking, the default gamma value setting of most displays can already meet the needs of most users, but in some specific application scenarios (such as professional image processing, video editing, etc.), more sophisticated gamma correction may be required to obtain better display effects.
Notes
1. Avoid extreme values: The gamma value is not the higher the better or the lower the better, but needs to be adjusted appropriately according to the specific situation. Too high a gamma value may cause the image to be too dark and details to be lost; too low a gamma value may cause the image to be too bright and the color to be distorted.
2. Professional calibration: For application scenarios that require high-precision color display (such as photography, design, printing, etc.), it is recommended to use professional calibration equipment and software to calibrate the monitor's gamma and other color parameters.
In summary, gamma in the monitor is a key parameter, which is of great significance for optimizing image quality and improving visual experience. Through reasonable gamma value setting and calibration, the monitor can more accurately restore the true color and brightness information of the image.