The analysis of visual information on the human head from a viewpoint change under the inverted presentation

Abstract

We investigated visual information on human heads viewed from a viewpoint change under the inverted presentation by using spatial frequency (SF) analysis. Stimuli were inverted images of three familiar peoples' heads viewed from the frontal view to the back of the head and were created by four band-pass filters (8, 16, 32, and 64c/fw). Participants were required to identify each person. On the results of Experiment 1, the face inversion effect occurred in all head angles, except the back of the head. The results of Experiment 2 showed that the mean response time (RT) of the inverted frontal view and the profile view significantly decreased when the image was in high SF. In contrast, RT of the back of the head decreased on the middle range of SF. These results suggest that the different view-specific information may exist on each view, even on the inverted presentation.