| Definition |
15:1 Minimum Contrast Ratio
The viewer can make basic decisions from the displayed image. Images and text are legible to the extent that basic decisions can be made
Decisions based on content itself, not resolution of detail Non-analytical viewing
The viewer is actively engaged with the content (e.g., information displays, presentations containing text and images, classrooms, boardrooms, multi-purpose rooms, product illustrations).
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50:1 Minimum Contrast Ratio
The viewer can make critical decisions with the ability to analyze details within the displayed image.
The viewer is analytical and fully engaged with the content’s details. This category requires that the finest detail available in an image is evident down to one line pair (e.g., art history classrooms, medical imaging, architectural/engineering drawings, forensic evidence, image inspection).
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