Three-dimensional pictorial displays, incorporating depth cues via stereopsis, offer a potential means of
displaying information in a natural way to enhance situational awareness and provide increases in operator
performance. Conventional computational techniques rely on asymptotic transformations and symmetric
clipping to provide the stereo pair. New techniques that replace these conventional computations were
developed to increase the control of the stereo-viewing space. Also, the effective region of stereopsis cuing
was determined empirically by comparing perceived depth against computed depth.
Conventional asymptotic transformations, used to map the visual scene to the stereo viewing volume,
allow a single, specific scene distance to be fixed at the screen location. The new piece-wise linear approach
allows creative partitioning of the depth viewing volume, with freedom to place the depth cuing emphasis
where desired. Asymmetric clipping makes better use of the available display surface than symmetric
clipping, and provides increased fields-of-view throughout the depth-viewing volume.
The results of the experiment determining the effective region of stereopsis cuing indicate that a practical
viewing volume falls between -25%and+60% of the viewer-to-screen distance. Also, the data revealed that
increasing viewer-to-CRT distances provide increasing amounts of usable depth.