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28 May 2001 Luminance response calibration using multiple display channels
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Abstract
The display of monochrome medical images requires that luminance verus display value be calibrated to provide good contrast at all brightness levels. Industry standards provide a specific grayscale curve for the calibration of display devices. The grayscale standard is derived from human perception data and is significantly different than the intrinsic luminance response of a cathode ray tube. Accurate calibration of a device usually requires that the display values be transformed and converted to a video signal using a 10 or 12 bit digital to analogue converter (DAC). We have developed an alternative method that uses the three 8 bit channels of a color graphic controller to achieve precise calibration. The method is demonstrated using a monitor having a video circuit to combine the red, green, and blue video signals with unequal weighting to form a monochrome video signal. Calibration is achieved by modifying the blue channel (10% video influence). Performance equivalent to an 11 bit DAC is demonstrated. The method is applicable to flat panel display devices.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael J. Flynn, Kenneth D. Compton, and Aldo Badano "Luminance response calibration using multiple display channels", Proc. SPIE 4319, Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures, (28 May 2001); https://doi.org/10.1117/12.428111
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