There are two forms of calibration: hardware and software, whereby the former is the more accurate.

With the ColorEdge series, EIZO offers the first LCD monitors with hardware calibration.

With hardware calibration, the target color is not reproduced through the graphic card output where all or a certain combination of white point, gamma, and brightness are reduced. The output is directly adjusted inside the hardware, meaning inside the monitor. If for example, the values are RGB 255, 255, 255 and the color temperature is lowered, the color adjustment takes place in the monitor. Therefore, the values R and G remain at 255. This also applies for the gamma or brightness adjustment; there is no loss of gradations between 0 and 255. If we now look at a picture with shades of gray, you can discover practically no color seepage or banding.

See Diagram

Software Calibration