Human Factors of Stereoscopic 3D Displays by Robert Earl Patterson Ph.D.

By Robert Earl Patterson Ph.D.

Human components of Stereoscopic monitors offers an outline of all vision-relevant themes and matters that tell stereo show layout from a user-centric or human issue, point of view. even though either the elemental imaginative and prescient technological know-how literature and the utilized literature could be reviewed, the energy and originality of this e-book comes from the emphasis at the simple technology literature on human stereo imaginative and prescient and its implications for stereo show design.

The reader will layout stereo monitors from a human vision/human elements perspective.

Over the previous a number of years, there was a growing to be curiosity within the improvement of high quality screens that current binocular parallax details to the human visible procedure for inducing the notion of third-dimensional intensity. The equipment for featuring binocular parallax to an observer differ generally and comprise 3 wide different types of reveal: stereoscopic, holographic and volumetric monitors. as the expertise for stereoscopic screens is extra constructed and extra typical, than these in response to holography or volumetric equipment, the proposed booklet addresses these human components matters curious about the viewing of stereoscopic displays.

Despite the varied tools for growing stereoscopic monitors, consisting of stereo spatial multiplexing in addition to temporal multiplexing (i.e., box sequential) thoughts, there stay universal human issue concerns that come up while viewing such screens. Human elements of Stereoscopic screens will supply an in depth overview of those vital concerns so one can be thought of whilst designing and utilizing 3D screens. In doing so, the subsequent issues can be coated: interocular move speak; interocular adjustments in luminance and distinction; accommodation-vergence mismatch; stereoanomaly; spatio-temporal frequency results; distance scaling of disparity and high-level cue conflict.

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In panel C of Fig. 2, the effective accommodation-vergence conflict (‘Effective A-V Conflict’) is depicted, which is taken to be the z-axis distance between the far boundary of the depth of field and the visual display. This is the approximate distance that would need to be traversed in order for the images on the display to be placed within the depth of field of the eye. Due to the existence of the depth of field, the user can simply shift convergence to a position slightly behind the perceived position of the virtual stimulus until the images on the display become positioned within the depth of field and blur is eliminated.

These classes of neuron form the neural basis of human stereo depth perception (see Fig. 1). LeVay and Voight (1988) and Freeman and Ohzawa (1990) have suggested that the response types of disparity-tuned cells may belong to a continuum, not to discrete categories. This concept would not change our analysis below; if a continuum exists, then the tuning curves shown in Fig. 1 would represent pooled responses from a number of crossed-disparity cells, uncrossed-disparity cells, and so on. For some individuals, depth perception in one disparity direction, crossed or uncrossed, is unreliable even though depth perception in the other direction is reliable.

Blurred images would then drive the accommodative response back to the display, which would pull vergence (an eye movement response) back to the display, and so on. However, many studies have conflated a conflict in stimulation (shown in Fig. 1) with this assumed conflict in responding. But when one examines the situation more closely, it is unlikely that a conflict in responding will always occur. Patterson (2009) discussed how an accommodation-vergence conflict should be less of a problem than commonly assumed and occur only for short viewing distances owing to the depth of field of the human eye.

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