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.
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Showing 1 to 16 of 16 for “"Virtual Scene"”.
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Adaptation to a linear vection stimulus in a virtual reality environment
… "looming linear vection" responses produced by a virtual checkerboard hallway scene moving towards the observer. In the Earth's gravity environment, the input of the vestibular system can be explored by setting the subject's body orientation (and axis of the vestibular system) in line with or …
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GPU ray tracing with CUDA
… how light rays interact with objects in a virtual scene. The ray tracing technique can accurately portray advanced optical effects, such as reflections, refractions, and shadows, but at a greater computational cost and rendering time than other rendering methods. Fortunately, technological …
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Generating Efficient Feedback and Enabling Interaction in Virtual Worlds for Users with Visual Impairments
Virtual worlds have become very popular in the last decade and now these simulated environments have tens of millions of active users worldwide. Users benefit from virtual worlds in many different areas including social interaction, gaming, education and business. However, for users with visual …
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Responsive IoT : using biosignals to connect humans and smart devices
… are used as the interface to navigate in a Virtual Reality (VR) environment. We develop Sublime, a new concept of Steady-State Visually Evoked Potentials (SSVEP) based Brain-Computer Interface (BCI). In this technology, brain-computer communication is triggered by imperceptible visual …
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A case study in the use of avatar-based therapy utilising the externalisation of problems with an adult on the autistic spectrum
… combined with the use of avatars within a virtual world. The basis of this approach was the idea that this environment could help facilitate the externalisation phase of narrative therapy, to help produce more positive narratives about the client’s lived experience. It is qualitative …
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Software Tools for Integral Imaging Virtual Studios
… the cost and provide extensive creativity, 3D virtual studios that can carry out a set of tasks from image capturing, processing, virtual scene generation, image compositing, compression, editing etc are necessary for 3D television program production. While 2D virtual studios have been …
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Linking focus and context in three-dimensional multiscale environments
… to various kinds of reference frames in a virtual scene and to each other---linking one or more focal views with a view that provides context. Central to these techniques is the explicit recognition of the frames of reference inherent in objects, in computer-graphics viewpoint …
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3D task performance using head-coupled stereo displays
… to display stereo images of three-dimensional scenes using perspective projections defined dynamically by the positions of the observer's eyes. The user is presented with a virtual scene located within or in front of the workstation monitor and can move his or her head around to obtain …
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Virtual reality based upper extremity stroke rehabilitation system.
Some studies suggest that the use of Virtual Reality technologies as an assistive technology in combination with conventional therapies can achieve improved results in post stroke rehabilitation. Despite the wealth of ongoing research applied to trying to build a virtual reality based system for …
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Binaural technology for virtual reality
… generation and use of non-intrusive artificial virtual environments is gaining more and more importance. Virtual environments are used in a variety of fields such as product design or evaluation of prototypes. Moreover they turned out to be very effective for the visualization of complex data …
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Multimodal interactions in virtual environments using eye tracking and gesture control.
… users with more natural ways to interact with virtual environments than using traditional input methods. An emerging approach is gaze modulated pointing, which enables users to perform virtual content selection and manipulation conveniently through the use of a combination of gaze and other …
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Low latency technology for interactive virtual environments
… topic for the development of multi-modal Virtual Environments (VE). Human perception thresholds have to be met in order to create immersive environments with a high degree of believability. The system latency has to be in the range of milliseconds, indicating the need for fast interfaces …
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Path from Photorealism to Perceptual Realism
… is to achieve Perceptual Realism — producing virtual imagery that is perceptually indistinguishable from real-world 3D scenes. Such a significant upgrade in the level of realism offers highly immersive and engaging experiences that have the potential to revolutionise numerous aspects of life …
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Image Based View Synthesis
… with the image-based approach to synthesize a virtual scene using sparse images or a video sequence without the use of 3D models. In our scenario, a real dynamic or static scene is captured by a set of un-calibrated images from different viewpoints. After automatically recovering the geometric …
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Extending touch with eye gaze input
… that holds the device; and free-hand gesture in virtual reality to interact with any viewed object at a distance located in the virtual scene. Overall, we demonstrate that using eye gaze to enable indirect input yields many interaction bene ts, such as whole-screen reachability, occlusion-free …
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Efficient photogrammetric reconstruction from 360 images for enhanced scene exploration and immersive observation [Ricostruzione fotogrammetrica efficiente da immagini a 360° per un’esplorazione avanzata della scena e un’osservazione immersiva]
… e l'esplorazione di ambienti complessi in spazi virtuali. Questa ricerca si concentra sullo sviluppo di metodi efficienti per la ricostruzione fotogrammetrica utilizzando immagini equirettangolari a 360°, con l'obiettivo di migliorare l'esplorazione delle scene e creare esperienze virtuali …