Which description correctly identifies the display monitor's grayscale and brightness calibration?

• A. Exposure recognition
• B. Window width (WW)
• C. Grayscale standard display function (GSDF)
• D. Automatic brightness control (ABC)

Answer: (C)

Grayscale standard display function is the calibration method that defines how digital image values map to display brightness so that perceptual differences in gray are consistent across monitors and viewing conditions. This standard sets a uniform luminance response, ensuring that the same pixel value appears with the same perceived brightness on different displays, which is essential for accurate image evaluation in radiography. Window width, by contrast, adjusts the range of gray shown for a given image but does not calibrate the monitor’s overall grayscale response. Exposure recognition and automatic brightness control aren’t the universal calibration framework used for ensuring consistent grayscale across devices.