Virtual Reality prototyping can be used early in a design process, in order to question observers about the aesthetics of future vehicles, without the need for physical mock-ups. However, it is suspected that numerica...
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ISBN:
(纸本)9781450302487
Virtual Reality prototyping can be used early in a design process, in order to question observers about the aesthetics of future vehicles, without the need for physical mock-ups. However, it is suspected that numerical display formats and solutions are not all equivalent, concerning the physical dimensions an observer is able to appreciate. This question is particularly acute, if one considers the transferability of conclusions reached using virtual prototyping to the real outcome of the design process.
This paper introduces a solution for enhancing depth perception in a given 3D computer-generated scene. For this purpose, we propose a framework that decides on the suitable depth cues for a given scene and the render...
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ISBN:
(纸本)9781450302487
This paper introduces a solution for enhancing depth perception in a given 3D computer-generated scene. For this purpose, we propose a framework that decides on the suitable depth cues for a given scene and the rendering methods which provide these cues. First, the system calculates the importance of each depth cue using a fuzzy logic based algorithm which considers the target tasks in the application and the spatial layout of the scene. Then, a knapsack model is constructed to keep the balance between the rendering costs of the graphical methods that provide these cues and their contibution to depth perception. This cost-profit analysis step selects the proper rendering methods. In this work, we also present several objective and subjective experiments which show that our automated depth enhancement system is statistically (p
In this paper we explore the ability of the human visual system to detect inconsistencies in the illumination of objects in images. We specifically focus on objects being lit from different angles as the rest of the i...
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In this paper, we investigate the ability of humans to determine the sex of conversing characters, based on audio and visual cues. We used a corpus of motions and sounds captured from three male and three female actor...
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Optic flow is the coherent motion of a region in the visual field, and the visual system is astoundingly effective at perceiving this large-scale and complex percept. Whenever you rotate your head or move through a sc...
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ISBN:
(纸本)9781450302487
Optic flow is the coherent motion of a region in the visual field, and the visual system is astoundingly effective at perceiving this large-scale and complex percept. Whenever you rotate your head or move through a scene, nearly every part of your visual field moves at a different speed and velocity. For example, as you walk through a forest, the trees in the horizon appear to slowly expand, and the trees on your sides appear to rapidly move to the extremities of your vision visual field and disappear. In spite of such a myriad of local motions, all of this information is concisely summarized as moving forward. Such summary encoding of a large variety of elements makes this percept a potentially useful tool to exploit for visualization. For that reason, our goal in this study is to test the visual system's ability to use optic flow for a basic visualization task, feature detection.
At any given instant, much of a display appears in a user's peripheral vision. Based on the information available in a glance, the user moves their eyes, scanning the display for items of interest, and piecing tog...
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In this paper, we explore the perception of finger motions of virtual characters. In three experiments, designed to investigate finger animations, we asked the following questions: When are errors in finger motion not...
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Previous research, which has used images of real human faces and mostly from the same facial expression database [Matsumoto and Ekman 1988], has shown that individuals perceive emotions universally across cultures. We...
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ISBN:
(纸本)9781450302487
Previous research, which has used images of real human faces and mostly from the same facial expression database [Matsumoto and Ekman 1988], has shown that individuals perceive emotions universally across cultures. We conducted an experiment to determine whether culture affects the perception of emotions rendered on virtual faces. Specifically, we test the holistic perception hypothesis that individuals from collectivist cultures, such as East Asians, visually sample information from central regions of the face (near the top of the nose by the eyes), as opposed to sampling from specific features of the face. If the holistic perception hypothesis is true, then individuals will confuse emotional facial expressions that are different in terms of the shape of the mouth facial feature. Our stimuli were computer generated using a face graphical rendering tool, which affords a high level of experimental control for perception researchers.
Head-mounted displays (HMDs) allow users to observe virtual environments (VEs) from an egocentric perspective. In order to present a realistic stereoscopic view, the rendering system has to be adjusted to the characte...
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ISBN:
(纸本)9781450302487
Head-mounted displays (HMDs) allow users to observe virtual environments (VEs) from an egocentric perspective. In order to present a realistic stereoscopic view, the rendering system has to be adjusted to the characteristics of the HMD, e. g., the display's field of view (FOV), as well as to characteristics that are unique for each user, in particular her interpupillary distance (IPD). Typically, the user's IPD is measured, and then applied to the virtual IPD used for rendering, assuming that the HMD's display units are correctly adjusted in front of the user's eyes. A discrepancy between the user's IPD and the virtual IPD may distort the perception of the VE. In this poster we analyze the user's perception of a VE in a HMD environment, which is displayed stereoscopically with different IPDs. We conducted an experiment to identify virtual IPDs that are identified as natural by subjects for different FOVs. In our experiment, subjects had to adjust the IPD for a rendered virtual replica of our real laboratory until perception of the virtual replica matched perception of the real laboratory. We found that the virtual IPDs subjects estimate as most natural are often not identical to their IPDs, and that the estimations were affected by the FOV of the HMD and the virtual FOV used for rendering.
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