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Radiometric procedure for linearising computer-interfaced display systems.

T Woldeselassie1, P F Sharp

  • 1Department of Bio-Medical Physics and Bio-Engineering, University of Aberdeen, Foresterhill, UK.

Physics in Medicine and Biology
|July 1, 1988
PubMed
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This study introduces an objective method using a homemade radiometer for adjusting computer display devices. This ensures optimal image quality by linearizing screen luminance and improving display performance for recorded images.

Area of Science:

  • Medical Physics
  • Image Display Technology
  • Radiometry

Background:

  • Traditional computer display adjustment relies on subjective visual assessment of test patterns, often leading to suboptimal image quality.
  • The absence of objective procedures hinders consistent and accurate calibration of display devices for critical applications.

Purpose of the Study:

  • To develop and validate an objective method for calibrating computer-interfaced display devices.
  • To improve image quality by ensuring linear display characteristics and accurate luminance and density measurements.

Main Methods:

  • Utilizing a simple, homemade radiometer for screen luminance and transparency film density measurements.
  • Determining display brightness and contrast settings for linear optical density range.

Related Experiment Videos

  • Characterizing display device luminance response across grey levels.
  • Implementing a display-linearizing mapping based on measured characteristics.

    • Main Results:

    • The proposed method enables reproducible measurements of screen luminance and film density.
    • Achieved display linearization ensures screen luminance is a linear function of display grey-level value.
    • Film density measurements revealed screen phosphor uniformity characteristics.
    • The procedure provides a basis for reliable quality control of display device performance.

    Conclusions:

    • An objective, radiometer-based method offers a reliable approach to display device calibration.
    • Display linearization is crucial for optimizing recorded image quality and ensuring accurate density representation.
    • This technique facilitates consistent performance assessment and periodic maintenance of display systems.