Untersuchungen zur Optimierung von barrierefreien visuellen Kontrasten - Studies on the optimization of barrier-free visual contrasts

Visual accessibility is a prerequisite for people with visual impairments to be able to participate independently in public life. Requirements and standards therefore contain minimum contrasts and specifications for the reflectance of the materials with which the visual objects must be created.

The contrast requirements are so different that they are difficult to meet with many materials. It is known that optimizing the lighting means that even less high contrasts can be reliably detected. These include increasing luminance and preventing glare.

As part of research, a test stand was developed with which the parameters could be varied in a targeted manner and contrast vision studies were carried out on test subjects. Increasing the ambient luminance led to an improvement in the perception of contrasts. Despite increasing the ambient luminance, not every contrast could be recognized by all test subjects. Direct glare causes contrasts to be perceived more poorly.