Optical illusion in augmented reality

While developers are mainly tackling primary problems in devel-oping augmented reality (AR) systems [1-2], perceptually-correct augmentation rests a critical challenge. In this paper, we focus on how to correctly display and accurately convey the augmented virtual object's size with respect to real-world objects. We conducted a user study to examine how subjects would verify relative size of virtual objects, augmented in a real scene. The results con-firmed that optical illusion occurs in AR applications if comparative size of virtual objects to real-world ones is not considered.