Gamma (Gamma).

Digital image brightness each pixel has a certain degree, from black (0) to white (1). .The pixel value is input to the computer monitors the information. .However, due to technical limitations, flat screen (CRT) monitors only the output in a nonlinear way these values, namely: output = input ^ gamma adjustment in the case without, most CRT monitors have a <P .> digital image each pixel has a certain degree of light, from black (0) to white (1). .The pixel value is input to the computer monitors the information. .However, due to technical limitations, flat screen (CRT) monitors only the output in a nonlinear way these values, namely: </ P> <P> output = input ^ gamma </ P> <P> not .plus adjustment case, most CRT monitors have a gamma value of 2.5, meaning it is this: If the brightness of a pixel is 0.5, in the absence of color management applications with the intervention of (*), which .brightness on the monitor output is only 0.18 (0.5 ^ 2.5). .For the liquid crystal display (LCD), especially for notebook LCD, the output of the curve is more irregular. .Some calibration software or hardware can display the output image gamma curve according to a certain output, such as gamma value of 2.2 commonly used in Windows, which is almost the opposite reaction of human vision. .sRGB and Adobe RGB color is based on the value of 2.2 gamma set up. .</ P> <P> a monitor gamma value of 1.0, the most linear output (output = input), the gamma value of 2.2, the output of the image output device, will look more "flat" and in the absence of color .management applications will be the intervention was relatively light. .</ P> <P align=center> </ P> <P align=center> <1> linear gamma value of 1.0, the input-output 0.5 0.5 </ P> <P align=center> </ P> .<P align=center> <2> gamma value of 2.2 non-linear input-output 0.5 2.2 </ P> <P align=center> </ P> <P align=center> <3> non-linear .gamma value of 2.5, the input-output 0.5 0.18 </ P> <P align=center> </ P> <P align=center> <1> images look very "flat" and very light </ P> <P .align = center> </ P> <P align=center> <2> contrast of the image looks normal for the human eye view </ P> <P align=center> </ P> <P align=center> < .3> the image looks too dark </ P> <P> (*) color management applications such as Adobe Photoshop sRGB images in the display can accurately show the sRGB color, regardless of the display the default gamma value is. .</ P ><!-- Navigation Menu - ".