An Infocomm task group has developed a standard for sizing displayed images on AV systems. Current methods used by AV professions to calculate appropriate image sizes are not standardised, and their basis is not verifiable. The new standard (‘ANSI/INFOCOMM V202.01:2016, Display Image Size for 2D Content in Audiovisual Systems’) aims to establish universal methods and metrics for determining an appropriate image size.
Required image size and relative viewing positions are determined according to two defined viewing needs: basic decision making and analytical decision making. These are derived from another standard: ‘ANSI/INFOCOMM 3M-2011 Projected Image System Contrast Ratio (PISCR).’
Image resolution, height and size of image content are all prescriptive elements used to determine the required image size for a given application. The new standard also addresses minimum and maximum viewing distances and relative horizontal and vertical viewer locations. Formulas, part of the standard, can be used to design and display content to get past limitations in an environment.
Infocomm will make a calculation/assessment tool available on its website for displaying proper display image size, based on viewers’ needs.
“Before the standard, there was no way to quantify content in such a way that the designer could ensure that the image size was correct,” said Dick Tollberg, senior design engineer for AVI-SPL and a member of InfoComm’s Standards Steering Committee. “The standard gives direction to the creators and presenters of the content, while allowing the designer to use familiar methods to determine the correct image size for a given room. If the designer and the content adhere to the standard, the designer can guarantee that the image size will be satisfactory for all room participants.”
