This article discusses the effects of Animated Virtual Actors' (AVAs) visual complexity on Simulator Sickness (SS) in Virtual Reality (VR) applications. SS is one of the major disadvantages of VR simulations. Prev...
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ISBN:
(纸本)9780769537894
This article discusses the effects of Animated Virtual Actors' (AVAs) visual complexity on Simulator Sickness (SS) in Virtual Reality (VR) applications. SS is one of the major disadvantages of VR simulations. Previous research has shown that visual complexity correlates with SS. Yet complex AVAs are increasingly used along with real-time graphics. Minimising SS for a VR application is thus beneficial. A series of VR simulations were created to teach second-year psychology students about the navigational capabilities of desert ants with different levels of AVA's visual complexity: flat, cartoon, or lifelike. We predicted that more complex AVAs would induce more SS. The results contradicted the predictions, with no significant differences in SS between groups as a function of the AVAs visual complexity. Moreover, our methods succeeded in low overall levels of SS in all the simulations. Possible explanations and our future research directions are discussed.
This paper describes a new Point-Based-Rendering technique that is parsimonious with the rypically large data-sets captured by stereo-based, multi-view,3D imaging devices for clinical *** approach is based on image py...
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ISBN:
(纸本)9789898111678
This paper describes a new Point-Based-Rendering technique that is parsimonious with the rypically large data-sets captured by stereo-based, multi-view,3D imaging devices for clinical *** approach is based on image pyramids and exploits the implicit topology relations found in range images, but not in unstructured 3D point-could representations. An overvievv of our proposed PBR-based system for visualisation, manipulation, integration and analysis of sets of range images at native resolution is presented along with initial multi-view rendering results.
This paper proposes a new interactive visualization for analyzing large hierarchical structures and networks. The technique combines of different graph layout methods with a layout refinement process, an interactive n...
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This paper proposes a new interactive visualization for analyzing large hierarchical structures and networks. The technique combines of different graph layout methods with a layout refinement process, an interactive navigation mechanism and clustering algorithms. The integration of these components makes it flexible in dealing with a variety of graph and hierarchical structures. Interactive exploration is enabled with chain-context view. We aim to provide user with an effective mechanism for understanding of the nature of various networks. This could lead to the discovering and revealing of the hidden structures and relationships among elements as well as relationships associated with the elements.
Transfer functions (TF) are a means for improving the visualization of 3D medical image data. If in addition to intensity another property is employed, two-dimensional TFs can be specified. For this, 2D histograms are...
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Transfer functions (TF) are a means for improving the visualization of 3D medical image data. If in addition to intensity another property is employed, two-dimensional TFs can be specified. For this, 2D histograms are helpful. In this work we investigate how the property feature size can be used for the definition of 2D TFs and the visualization of medical image data. Furthermore, we compare this method to approaches that employ gradient magnitude as second property. From our experiments with several medical image data we conclude, that structure size enhanced 2D histograms are more intuitive. This is especially true in the clinical area, where physicians are much more familiar with the meaning of the size of anatomical structures than with the concept of gradient magnitude.
This research done introduces a parallel approach in visualising a three dimensional (3D) virtual heart model simulation dataset. The paper outlines briefly the Immersed Boundary Method (IBM) and how they differ from ...
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ISBN:
(纸本)9780769533599
This research done introduces a parallel approach in visualising a three dimensional (3D) virtual heart model simulation dataset. The paper outlines briefly the Immersed Boundary Method (IBM) and how they differ from regular CFD. The dissimilarities motivate the need to show graphical representation of the IBM. The Immersed Boundary Method was then used to compute the 3D heart model simulation. The resulting simulation data was then visualised utilising a parallel adaptation of the visualisation Tool Kit (VTK), an open source library. The visualisation was conducted in a cluster computing environment. The computers used in the cluster were off-the-shelf commodity personal computers. The number of processors involved in the parallelism would help to speed tip the rendering performance. This research will assist in low cost building of visualising biological modelling applications in the future.
We present a method to compute friction in a particle-based simulation of granular materials on GPUs and its data structure. We use Distinct Element Method to compute the force between particles. There has been a meth...
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ISBN:
(纸本)9780769533599
We present a method to compute friction in a particle-based simulation of granular materials on GPUs and its data structure. We use Distinct Element Method to compute the force between particles. There has been a method to accelerate Distinct Element Method using GPUs, but the method does not compute friction. We implemented friction into the DEM simulation on GPUs and this leads to the real-time simulation of granular materials.
computergraphics matured over many years and played an important role in the development of engineering products like automotive and aircraft components. The current CAx (CAD/CAM/ CAE) tools use computergraphics ext...
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ISBN:
(纸本)9780769533599
computergraphics matured over many years and played an important role in the development of engineering products like automotive and aircraft components. The current CAx (CAD/CAM/ CAE) tools use computergraphics extensively, while helping in conceiving better designs with improved quality. Nowadays, engineering product development is being done concurrently and collaboratively, due to the advances in computergraphics. This paper presents a brief overview on evolution of computergraphics over the years. It also attempts to present, how advances in computergraphics, have revolutionized the current engineering product development and what future technologies will offer.
This paper reviews the integration of computergraphics principles in simulating photorealistic 3D environments integrating life action footage for film. To achieve adequate believability and create impact, the look o...
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ISBN:
(纸本)9780769533599
This paper reviews the integration of computergraphics principles in simulating photorealistic 3D environments integrating life action footage for film. To achieve adequate believability and create impact, the look of the 3D background requires digital enhancement to achieve a certain stage of realism. This will depend primarily on the material/shader and renderer utilised in the 3D application. Despite having the realistic look, the other aspect to consider for a perfect merge between 3D and life requires one to skillfully match perspective and lighting. Another aspect to consider is the cinematography and composition of the scene.
Kuala Lumpur city is located at the confluence of two rivers and are flood prone area. With rapid development and uncontrolled town planning, the city had experience several major flash flood incidents and have caused...
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ISBN:
(纸本)9780769533599
Kuala Lumpur city is located at the confluence of two rivers and are flood prone area. With rapid development and uncontrolled town planning, the city had experience several major flash flood incidents and have caused tremendous damage to country. This research describes a study made to model and simulate the flash flood incident that struck Kuala Lumpur on 10 June 2007 using 3D computer Graphic and fluid simulation techniques. The aim is to examine the stability and effectiveness of this approach as a solution tool for environmental hazard studies. Particle-Based method used to model the fluid objects using MAYA software. Light Detection and Ranging (LIDAR) data and remote sensing imagery were used to model the study area. The main contribution of this study is the introduction of this approach to enhance realistic visualization for environmental studies thus enable better planning and countermeasures created to prevent the disaster.
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