Journal ArticleDOI
Visual cues for perceiving distances from objects to surfaces
Reads0
Chats0
TLDR
An accurate perception of the distance between an object and a nearby surface can increase a viewer's sense of presence in an immersive environment, particularly when a user is performing actions that affect or are affected by this distance.Abstract:
An accurate perception of the distance between an object and a nearby surface can increase a viewer's sense of presence in an immersive environment, particularly when a user is performing actions that affect or are affected by this distance. Two experiments were conducted examining the effectiveness of stereoscopic viewing, shadows, and interreflections at conveying this distance information. Subjects performed simple tasks based on the perception of the distance between a fixed virtual table and an approaching block in a virtual environment. In the first experiment, Subjects lowered a virtual block to a virtual table. For this task both stereoscopic viewing and shadows had statistically significant effects on subject performance. In the second experiment, subjects mechanically reported the perceived distance between a virtual block and virtual table. For this task, viewing condition, shadows, and interreflections were shown to be statistically significant distance cues.read more
Citations
More filters
Journal ArticleDOI
Effects of stereo viewing conditions on distance perception in virtual environments
TL;DR: The equivalent performance with stereo, bi-ocular, and monocular viewing suggests that the limitations on the presentation of stereo imagery that are inherent in head mounted displays are likely not the source of distance compression reported in previous virtual environment studies.
Proceedings ArticleDOI
The influence of rendering quality on presence and task performance in a virtual environment
P. Zimmons,A. Panter +1 more
TL;DR: An increase in physiological response, particularly heart rate, was demonstrated across all rendering conditions, and gender differences were noted in physiological responses, spatial ability tests, and simulator sickness questionnaires.
Proceedings ArticleDOI
Realistic virtual grasping
Christoph W. Borst,A.P. Indugula +1 more
TL;DR: This work presents a physically-based approach to grasping and manipulation of virtual objects that produces visually realistic results, addresses the problem of visual interpenetration of hand and object models, and performs force rendering for force-feedback gloves in a single framework.
Proceedings ArticleDOI
Perceptually Adaptive Graphics
TL;DR: This report outlines the state of the art as discussed at a EUROGRAPHICS/SIGGRAPH Campfire in May 2001, and the progress that has been made since.
Journal ArticleDOI
About the Influence of Illumination Models on Image Comprehension in Direct Volume Rendering
Florian Lindemann,Timo Ropinski +1 more
TL;DR: A user study in which users have investigated the influence of seven state-of-the-art volumetric illumination models on the spatial perception of volume rendered images and extracted those features which are possibly relevant for the improved spatial comprehension in a relational task.
References
More filters
Book ChapterDOI
Perceiving Layout and Knowing Distances: The Integration, Relative Potency, and Contextual Use of Different Information about Depth*
TL;DR: This chapter discusses three questions and suggests that list making has misled about space and layout and can begin to understand how those sources of information sharing the same-shaped functions across distances can help ramify judgments of layout by serving to correct measurement errors in each.
Proceedings ArticleDOI
A non-photorealistic lighting model for automatic technical illustration
TL;DR: A non-photorealistic lighting model is presented that attempts to narrow the gap in geometric information of the same richness as human-drawn technical illustrations and gives a clearer picture of shape, structure, and material composition than traditional computer graphics methods.
Journal ArticleDOI
Evaluating stereo and motion cues for visualizing information nets in three dimensions
Colin Ware,Glenn Franck +1 more
TL;DR: Two experiments show that motion cues combined with stereo viewing can substantially increase the size of the graph that can be preceived, and structured 3D motion and stereo viewing both help in understanding, but that the kind of motion is not particularly important.
Journal ArticleDOI
Natural problems for stereoscopic depth perception in virtual environments
TL;DR: A brief review of the literature pertaining to the representation of depth in stereoscopic VR displays is provided, with specific attention paid to the response of the accommodation system with its cross-links to vergence eye movements, and to the spatial errors that arise when portraying three-dimensional space on a two-dimensional window.
Journal ArticleDOI
Perceiving spatial relationships in computer-generated images
TL;DR: Cue theory, which states that the visual system computes the distances of objects in the environment based on information from the posture of the eyes and from the patterns of light projected onto the retinas by the environment, is presented.