The accumulation of falling snow is a complex physical process that involves a variety of environmental factors. While much past work has been done on the rendering of accumulated snow for gaming applications, scienti...
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ISBN:
(纸本)9781510673892;9781510673885
The accumulation of falling snow is a complex physical process that involves a variety of environmental factors. While much past work has been done on the rendering of accumulated snow for gaming applications, scientific simulation of snow accumulation has been limited to large-scale mountain ranges and watersheds. These large-scale simulations are not relevant for simulations of autonomous ground vehicle (AGV) performance, for which the relevant length scales are a few meters to a few hundred meters. In this work, we present a physics-based simulation of the accumulation of falling snow that is implemented using smoothed-particle hydrodynamics (SPH) to represent snow mass elements. SPH has been used in past work to simulate not only fluids but also deformable and continuous media ranging from concrete to fabric to soil. In this work we show that SPH can be parametrized to have material properties that reasonably approximate the bulk properties of accumulated snow. We present several example simulations in which SPH has been used to calculate the accumulation of fallen snow in an off-road scene. Finally, we show how the SPH simulation output can be combined with a rendering simulation to create realistic synthetic images.
computer technology injects new vitality to the field of graphics design;computer graphics technology is adaptive to the era of rapid development of economic globalization and three-dimensional business competition. W...
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ISBN:
(纸本)9781479969890
computer technology injects new vitality to the field of graphics design;computer graphics technology is adaptive to the era of rapid development of economic globalization and three-dimensional business competition. With the development of economy, computer graphics technology develops rapidly. Now, the development of the computer graphics technology is mainly divided into two-dimension technology and three-dimension graphics technology. computer graphics technology pays attention to the operation of the computer technology, pays more attention to the performance of the design art, and especially pays attention to the cultivation of the creative consciousness.
Physically based renderers produce high quality images with high dynamic range (HDR) values. Therefore, these images need to be tone mapped in order to be displayed on low dynamic range (LDR) displays. A typical appro...
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ISBN:
(纸本)9780992862619
Physically based renderers produce high quality images with high dynamic range (HDR) values. Therefore, these images need to be tone mapped in order to be displayed on low dynamic range (LDR) displays. A typical approach is to blindly apply tone mapping operators without taking advantage of the extra information that comes for free from the modeling process for creating a 3D scene. In this paper, we propose a novel pipeline for tone mapping high dynamic range (HDR) images which are generated using physically based renderers. Our work exploits information of a 3D scene, such as geometry, materials, luminaries, etc. This allows to limit the assumptions that are typically made during the tone mapping step. As consequence of this, we will show improvements in term of quality while keeping the entire process straightforward.
The availability of large quantities of cultural-heritage data will enable new, previously inconceivable, types of analysis and new applications. Currently, most emerging analysis methods are experimental research. It...
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The availability of large quantities of cultural-heritage data will enable new, previously inconceivable, types of analysis and new applications. Currently, most emerging analysis methods are experimental research. It's likely to take many years before the research matures and provides cultural-heritage professionals with novel research methods that they use routinely. Indeed, we can expect further disruptive technologies to emerge in the foreseeable future and a 'steady state' of continuing rapid change. Part 1 can be found at 10.1109/MCG.2014.47.
This special section of the IEEE Transactions on Visualization and computer graphics (IEEE TVCG) presents the five most highly rated papers from the 2023 IEEE Pacific Visualization Symposium (IEEE PacificVis), hosted ...
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This special section of the IEEE Transactions on Visualization and computer graphics (IEEE TVCG) presents the five most highly rated papers from the 2023 IEEE Pacific Visualization Symposium (IEEE PacificVis), hosted in Seoul, Korea from April 18 to Apr 21, 2023. IEEE PacificVis, sponsored by the IEEE Visualization and graphics Technical Committee (VGTC), aims to foster greater exchange between visualization researchers and practitioners, especially in the Asia-Pacific region. This forum has grown to be a truly international event, attracting submissions and attendees from many countries, not only in the Asia-Pacific but also in Europe, America, and beyond. Thus, IEEE PacificVis is serving the additional purpose of sharing the latest advances in the field of visualization with researchers and practitioners in the region and, also, introducing research developments from the region to the broader international visualization research community.
The ability to understand the complex architecture and dynamic functionality of the human brain is critical to the advancement of neuroscience research and clinical applications. Traditional 2D neuroimaging techniques...
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ISBN:
(纸本)9783031717031;9783031717048
The ability to understand the complex architecture and dynamic functionality of the human brain is critical to the advancement of neuroscience research and clinical applications. Traditional 2D neuroimaging techniques often fall short in providing a comprehensive view of brain activity, particularly when attempting to correlate structural and functional data. This limitation affects our capacity to accurately diagnose and treat neurological disorders. To address this challenge, this paper describes the Brain Visualizer, a novel tool designed to process Electroencephalography (EEG) signals and Magnetic Resonance Imaging (MRI) data to dynamically reconstruct and visualize brain activity in three dimensions. By integrating the high temporal resolution of EEG with the high spatial resolution of MRI, the Brain Visualizer provides a comprehensive and interactive representation of brain networks and tracts. The platform offers a user-friendly interface, advanced visualisation techniques and real-time interaction capabilities, making it a valuable resource for researchers, clinicians and educators. In addition, the tool has potential applications in the development of neuroadaptive systems and brain-computer interfaces, thereby advancing the field of neuroscience and improving the quality of life for people with disabilities.
We are witnessing a sudden increase in the general public's interest in computer graphics, whose creation is due to AI image generators. These tools are responsible for creating realistic graphics from the entered...
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ISBN:
(纸本)9783031662676;9783031662683
We are witnessing a sudden increase in the general public's interest in computer graphics, whose creation is due to AI image generators. These tools are responsible for creating realistic graphics from the entered text description. They are based on deep learning algorithms trained on an extensive graphical data set. Recently, the artificial intelligence system behind OpenAI, DALL-E 2, which can generate digital images based on textual descriptions, has become widely available. In addition, more and more similar tools are appearing on the market, such as Craiyon, Imagen, Midjourney, Stable Diffusion, etc. AI-generated designis an emerging technology whose advantages and disadvantages in engineering applications have yet to be verified. We analysed the advantages and disadvantages of applying this technology in product design within Industry 4.0.
We address the model reduction for huge 3D meshes of industrial plants, which typically consist of millions of triangles. The proposed method converts an input plant mesh into a set of primitive shapes, each of which ...
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ISBN:
(纸本)9798350374490;9798350374506
We address the model reduction for huge 3D meshes of industrial plants, which typically consist of millions of triangles. The proposed method converts an input plant mesh into a set of primitive shapes, each of which is represented by an implicit representation. To this end, we initially partition the input mesh using geometric features, and then, an implicit function is fitted to each part such that the surface deviation is minimized. In this way, the proposed method achieves to reduce the model size to less than 10% of the original one. By sorting the primitives using a bounding volume hierarchy (BVH), our system can also visualize the model-reduced shape format approximately in real-time.
This survey paper provides an in-depth survey of the application of eXtended Reality (XR) technology in the fields of commerce, management, and business edutainment. XR is a collective term that encompasses Virtual Re...
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ISBN:
(纸本)9798350373141;9798350373158
This survey paper provides an in-depth survey of the application of eXtended Reality (XR) technology in the fields of commerce, management, and business edutainment. XR is a collective term that encompasses Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR), and it is poised to transform how businesses operate, engage with consumers, and educate their employees. This survey examines the current state of XR technology in these areas, highlighting its impact, challenges, and future potential. It explores case studies and real-world applications, revealing the diverse ways in which XR is being utilized in commerce, management, and business edutainment.
Background: The use of 3D imaging techniques, such as X-ray CT, in root phenotyping has become more widespread in recent years. However, due to the complexity of the root structure, analyzing the resulting 3D volumes ...
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Background: The use of 3D imaging techniques, such as X-ray CT, in root phenotyping has become more widespread in recent years. However, due to the complexity of the root structure, analyzing the resulting 3D volumes to obtain detailed architectural root traits remains a challenging computational problem. When it comes to image-based phenotyping of excavated maize root crowns, two types of root features that are notably missing from existing methods are the whorls and soil line. Whorls refer to the distinct areas located at the base of each stem node from which roots sprout in a circular pattern (Liu S, Barrow CS, Hanlon M, Lynch JP, Bucksch A. Dirt/3D: 3D root phenotyping for field-grown maize (zea mays). Plant Physiol. 2021;187(2):739–57. https://***/10.1093/plphys/kiab311.). The soil line is where the root stem meets the ground. Knowledge of these features would give biologists deeper insights into the root system architecture (RSA) and the below- and above-ground root properties. Results: We developed TopoRoot+, a computational pipeline that produces architectural traits from 3D X-ray CT volumes of excavated maize root crowns. Building upon the TopoRoot software (Zeng D, Li M, Jiang N, Ju Y, Schreiber H, Chambers E, et al. Toporoot: A method for computing hierarchy and fine-grained traits of maize roots from 3D imaging. Plant Methods. 2021;17(1). https://***/10.1186/s13007-021-00829-z.) for computing fine-grained root traits, TopoRoot + adds the capability to detect whorls, identify nodal roots at each whorl, and compute the soil line location. The new algorithms in TopoRoot + offer an additional set of fine-grained traits beyond those provided by TopoRoot. The addition includes internode distances, root traits at every hierarchy level associated with a whorl, and root traits specific to above or below the ground. TopoRoot + is validated on a diverse collection of field-grown maize root crowns consisting of nine genotypes and spanning across three years.
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