Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"Depth cues"”.
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Spatial Depth Cues in Temporal Reasoning
… the two temporal orientations and spatial depth cues. Four depth cues were tested: relative size, atmospheric disturbance, object occlusion and linear perspective. Participants were primed by reading temporal sentences imbued with either ego-moving or time-moving characteristics. …
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Perceptual depth cues in support of medical data visualisation
… Specifically, it examines the use of perceptual depth cues (PDCs) and perceptual depth cue theory to create effective visualisations. Two visualisation systems are explored: one to display X-ray data and the other to display volumetric data. The systems are enhanced using stereoscopic and motion …
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Dynamic integration of depth cues for surface reconstruction from stereo images
This thesis describes a computational method for surface estimation from stereo images. The images are obtained with a dynamically controlled camera system, having imaging parameters which are selected on the basis of an evolving composite description of the surfaces in the environment. This …
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Efficacy of retinal disparity depth cues in three-dimensional visual displays
… need to assess the efficacy of retinal disparity depth cues. Accordingly, this study analyzed performance on two 3-D tasks under three levels of signal-to-clutter ratio as participants viewed three display formats portrayed with or without retinal disparity depth cues. Display formats included a …
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Effects of retinal disparity depth cues on cognitive workload in 3-D displays
… The usefulness of stereopsis to present depth information has been studied in terms of performance measures such as search time, search accuracy, and subjective image quality ratings. Few, if any, studies have been conducted to investigate the influence of stereopsis upon cognitive …
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Effects of depth cues on depth judgements using a field-sequential stereoscopic CRT display
… believed that stereopsis provides a potent depth information cue, numerous monocular cues exist which may augment, detract from, or even supplant stereopsis. Unfortunately, few guidelines or well-controlled analyses on the use of depth cues are available to direct engineering implementations …
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Investigation of head movement and intensity as depth cues in a perspective contact analog display.
Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics. Thesis. 1968. M.S.
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Development in the depiction of depth
… of the way in which children and adults depict depth when drawing a table. Research on development in depiction is reviewed (Chapters 1 and 2), with particular reference to the use of pictorial depth cues and projection systems. A series of studies on the use of projection systems in the drawing …
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Investigation of the Effects of an Autostereographic Virtual Environment on Recall in Participants of Differing Levels of Field Dependence
… the displayed environment to be separated in depth from the display itself. The effectiveness of stereographic virtual environments as learning tools has been evaluated relative to factors such as multidimensional cues, user interaction, and learner characteristics. This study has examined the …
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Path from Photorealism to Perceptual Realism
… real-time rendering algorithm that facilitates depth perception from binocular depth cues for stereoscopic displays, especially those under low luminance. The algorithm was designed based on a proposed model of stereo constancy that predicts the precision of binocular depth cues for a given …
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Holographic augmented reality : towards near-to-eye electroholography via guided wave acousto-optics
… present correct accommodation and vergence cues to the viewer, limiting their potential for seamless, comfortable augmented reality applications. Recent techniques based around light-field display methods show promise in the delivery of consistent depth cues although their applicability in …
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Which way did I go?: Motion correspondence with a Ternus display projected into three-dimensions
The present study examined the effects of a depth manipulation on the perception of apparent motion in a Ternus display. Twenty-two volunteers each viewed four conditions of a Ternus display with varying interstimulus intervals, and reported the type of motion perceived (either "group" or "element" …
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Combining recognition and geometry for data-driven 3D reconstruction
… techniques rely almost exclusively on depth cues that come from multiple view geometry. While these cues can be used to produce highly accurate reconstructions, the resulting point clouds are often noisy and incomplete. Due to these issues, it may also be difficult to answer …
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Computational and laboratory investigations of a model of blood droplet flight for forensic applications
… Stereoscopic 3D (S3D) creates the impression of depth (stereopsis) in at images by providing additional binocular depth cues, such as convergence and binocular disparity. In this thesis, we explore the e ects that S3D has on the player experience in an attempt to uncover design methodologies that …
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Stereoscopic depth axis interaction: A study of performance and engagement in stereoscopic 3D games.
… Stereoscopic 3D (S3D) creates the impression of depth (stereopsis) in at images by providing additional binocular depth cues, such as convergence and binocular disparity. In this thesis, we explore the effects that S3D has on the player experience in an attempt to uncover design methodologies …
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Using virtual reality to investigate the visual features that determine the effectiveness of disruptive camouflage
… shadowed environments or by inducing false depth cues, and/or by distracting observers from the true edge of the animal.<br/><br/>In this thesis I have two general objectives: to examine the visual features that make disruptive camouflage and edge enhancement effective, and the development, …
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An updatable three-dimensional display via direct optical fringe writing of computer - generated holographic stereograms in photorefractive polymer
… generation - reintroduces accommodation cues to the resulting holographic images and represents a reduction of system footprint, complexity, and cost relative to the current interference-based systems. The adaptation of the Diffraction Specific Coherent Panoramagram fringe computation …
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Integrated Visible-Light Platforms, Devices, and Systems for Augmented Reality and Beyond
… of producing holographic images with full depth cues; this lack of depth information results in users experiencing eyestrain and headaches that limit long-term and wide-spread use of these displays. Here, to address these limitations, VIPER (Visible Integrated Photonics Enhanced Reality), a …
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Optimisation of Phase-Only Computer-Generated Holograms
… systems rely on artificial tricks to simulate depth, leading to discomfort and limited realism. Holography, by contrast, fully reconstructs the optical wavefront of 3D objects and generates a full 3D light field with true depth cues, which has the potential to provide an unparalleled sense of …
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A 3-D display head-set for personalized computing
… disc recorder; a magnetic position sensor, and a depth cue based animation package. This implementation has permitted the creation of a highly interactive three dimensional trainer/simulator . Computer generated controlled images are optically mixed into the surrounding environment by imaging …
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