Calibration is the comparison of an actual metric against a standard of known accuracy. For displays and monitors, the most important parameters to be calibrated are the brightness, color and white point settings. This means adjusting both the light output of the screen and the primary colors.
For traditional stand-alone screens, including television sets at home, calibration is unnecessary. The quality of the displays is usually good enough to be close to the standard. Both colors and brightness will remain sufficient to provide an acceptable image quality. There is thus no need for calibration tools. For professional displays however, calibration is crucial. Medical displays for example, where a slight nuance can have severe medical consequences, really need perfect calibration. This is why all of Barco’s medical displays feature a calibration device.
Also in video wall applications, perfect calibration is required as it impacts the viewing experience. Panels are calibrated in the factory. This means that the wall will normally look good upon installation. However, there are slight changes in color, brightness and contrast over time. This is barely noticeable for stand-alone screens, but when the panels are located close to each other the slightest difference in color perception and brightness shift is clearly visible. This downplays the message the video wall wants to bring across. Without perfect calibration, the complete video wall will seem out of balance (see the image below, taken at a real-life airport terminal).