Live Calibration Yields Lively Colors
Article by Tobias Steinel and Martin Wolf
Human Perception—The Reference
Color and brightness are central to human visual perception and define the relevant criteria for quality control of any display. The human eye is extremely sensitive to color and brightness changes and adapts easily to low and high light-intensity conditions. Consequently, high display uniformity of brightness and color is a prerequisite for a satisfying user experience.
For quality control, most mass-produced displays are tested by imaging light-measurement devices (ILMD), usually by employing calibrated complementary metal-oxide-semiconductors (CMOS) or charge-coupled device (CCD) sensors. With an accurate calibration optimized to the device under test (DUT) and to the measurement conditions, ILMDs can measure and control luminance and color values with respect to human perception, as defined by the CIE 1931 standard.