Improvement of apparent resolution by subjective super-resolution display for aerial display using AIRR

AIRR (Aerial imaging by retro-reflection) can form a large aerial image in mid-air for digital signage. Resolution of the aerial image formed with AIRR is determined mainly by the retro-reflector, which is one of its components. However, increasing the resolution of aerial images by increasing the density of retro-reflective elements poses physical limitations and cost increases. The purpose of this study is to improve the apparent resolution of aerial images by utilizing subjective super-resolution display method. Subjective super-resolution display method is a display method in which spatially coded images are alternately shown on a display panel in a time-shared manner to give the illusion of higher resolution than the number of pixels on the display panel. We validate the effectiveness of the proposed method by evaluating it through subject experiments. In the experiment, the normal display method and the proposed method are evaluated by Scheffe's paired comparison method. As a result of the experiment, it was found that at the 5% level of significance, the display by the proposed method appeared to have higher resolution than the normal display method.