Perceived Realism of Virtual Environments Depends on Authenticity

Perceived Lightness Depends on Perceived Spatial

A change in the perceived spatial position of a surface can change its perceived color from black to white or from white to black. This Anding challenges the widespread view that denies any substantial role of depth perception in the perception of surface lightness (the shade of gray between white and black). Since 1948, when Hans Wallach published his classic experiments in lightness constancy...

Navigating through Virtual Environments: Visual Realism Improves Spatial Cognition

Recent advances in computer technology have significantly facilitated the use of virtual environments (VE) for small and medium enterprises (SME). However, achieving visual realism in such VE requires high investments in terms of time and effort, while its usefulness has not yet become apparent from research. Other qualities of VE, such as the use of large displays, proved its effectiveness in ...

Computer graphics and virtual environments - from realism to real-time

Perceived rate of movement depends on contrast.

The perceived rate of movement of sine wave gratings has been measured over a range of contrasts. At temporal frequencies below about 8 Hz a decrease in contrast reduces apparent velocity. At 16 Hz a reduction in contrast increases perceived velocity.

Vection depends on perceived surface properties.

Optic flow provides important information for the perception of self-motion and can be generated by both diffuse and specular reflectance. Previous self-motion research using virtual environments has primarily considered the properties of diffuse optic flow, but not of specular flow. We used graphical simulations to examine the extent to which visually induced self-motion (vection) is robust ag...