THE DEPENDENCE OF PERCEIVED PICTORIAL SPATIAL STRUCTURE ON THE OBSERVER VANTAGE POINT
When the same picture is observed from different locations, perception of 3D spatial directions can change dramatically. Two classes of such vantage point effects are demonstrated and discussed. One class includes the â€™egocentric roadâ€™ effect, in which a painted road is perceived to point at the observer wherever the observer moves. The other class includes the â€˜Mona Lisa effectâ€™, in which a portraitâ€™s gaze â€˜followsâ€™ the observer. The phenomena involved in these effects are similar but their geometric bases are different.