Study design for human acuity in symbol recognition

To date, there are no adequate quality parameters for see-through displays based on augmented and virtual reality especially for future automotive applications available. Recent approaches define detected stimuli in sinusoidal grids by their size, spatial and temporal frequency contrast sensitivity, luminance and eccentricity. The approach in this work is to know the background luminance and the display luminance distribution in order to define the contrast local rather than global for displays. This approach is based on the assumption that the ambient luminance distribution has a major influence on human visual acuity and its parameters. Therefore, a quantitative study concept is proposed based on a case study and the derivation of the relevant parameters. By means of the described investigations it is possible to define the operating range of the optical human-machine interaction and the relevant optical parameters in head-up displays.