EVALUATION OF COMPUTER DISPLAY SYSTEMS USING DIGITAL TEST PATTERNS

  • 1 January 1981
    • journal article
    • research article
    • Vol. 22  (3) , 264-268
Abstract
Two digital test patterns are used to evaluate computer video display system used in nuclear medicine. One pattern consists of linear and log gray-scale wedges, blocks of constant brightness, and horizontal and vertical bar patterns. The other is a crosshatch bar pattern. These patterns are used to assess display system''s gray scale, resolution and spatial linearity. Microdensitometry measurements were performed to determine brightness uniformity and spatial resolution and to relate optical density to exposure. These test patterns, used qualitatively, are useful in the routine adjustment and quality control of digital systems. The precise quantitative characterization of a display system is necessary for image processing.

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