Display Image Size

Display Image Size refers to the active image area displaying a user’s content. It’s not about the size of the screen or display, but about what is being shown.

Vocabulary

Definitions from the standard include:

 

Drawing Samples

To conform to the standard, you’ll need to create some drawings. Here are some samples.

magnifying-icon-200x200 Click on the image to enlarge

closest-viewer-calculation-bdm

viewing-parameters-adm

Ready to Dive in Farther?

Get practical tips on how to implement the DISCAS standard to choose the right display size in your next project with AVIXA’s education. Don’t miss AV Design 1: Environment where you can learn about element, resolution and screen size as a complete system.

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Further Reading

These references appear in the DISCAS standard:

  • ANSI/INFOCOMM 3M-2011, Projected Image System Contrast Ratio
  • ANSI/HFES 100-2007, Human Factors Engineering of Computer Workstations
  • Peter G.J. Barten – Knegsel, Contrast Ratio Sensitivity of the Human Eye and its Effects on Image Quality, (HV Press, 1999)
  • Hongyi Cai, Ph.D., and Paul A. Green, Ph.D., Legibility Index for Examining Common Viewing Situations: A New Definition Using Solid Angle
  • Peter G. Engeldrum, Psychometric Scaling: A Toolkit for Imaging Systems Development, (Imcotek Press, 2009)
  • MIL-STD-1472G, DEPARTMENT OF DEFENSE DESIGN CRITERIA STANDARD: HUMAN ENGINEERING (United States Government, 2012)
  • Herman Snellen, Eye Chart (Amsterdam, 1862)
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