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检索条件"任意字段=Conference on 3D Virtual Reconstruction and Visualization of Complex Architectures"

共 1553 条记录，以下是411-420 订阅

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SailVis: reconstruction and multifaceted visualization of sail shape

SailVis: Reconstruction and multifaceted visualization of sa...

引用

23rd Eurographics conference on visualization, EuroVis 2021

作者： Mu, danfeng Pieras, Marcos Broekens, douwe Marroquim, Ricardo Delft University of Technology Delft Netherlands Sailing Innovation Center The Hague Netherlands

ISBN: (纸本)9783038681434

While sailing, sailors rely on their eyes to inspect the sail shape and adjust the configurations to achieve an appropriate shape for a certain the weather condition. Mastering this so-called trimming process requires years of experience since the visual inspection of the sail shape suffers from inaccuracies and many times are difficult to communicate verbally. Therefore, this research proposes a visual analysis tool that presents an accurate sail shape representation and supports sailors in investigating the optimal sail shape for certain weather conditions. In order to achieve our goals, we reconstruct the 3d sail shape from point clouds acquired by photogrammetry methods. For incomplete acquisitions we deform a complete template sail to estimate the missing parts. We designed a visualization dashboard for sailors to explore the 3d structure, 2d profiles and characteristics of the time-varying sail shape as well as analyze their relation to boat speed. The usability of the visualization tool is tested through a qualitative evaluation with two sailing experts. The result shows that the reconstruction and deformation of sail shape are plausible. Furthermore, the visualization dashboard has the potential to enhance sailors' comprehension of sail shape and provide insights towards optimal trimming. © 2021 Eurographics Association. All rights reserved.

关键词： visualization

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Review On Brain Tumor Malignancy Prediction By 3d reconstruction 2

Review On Brain Tumor Malignancy Prediction By 3D Reconstruc...

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2nd International conference on Advances in Computing, Communication, Embedded and Secure Systems, ACCESS 2021

作者： Manoj, K.C. dhas, Anto Sahaya Vimal Jyothi Engineering College Kannur India

ISBN: (纸本)9781728171364

A major increase in brain tumor has been seen in recent years, and it is in the tenth position. It is sever type of cancer and influences in people of all ages. Hence, if diagnosed well at the initial stage, it will turn out to be one of the most curable types of tumors. The computer aided analysis of MRI is performed to diagnosis the tumor through the process of classifying and segmenting. From the previous years of study, the research areas are mainly concentrated on machine and deep learning for brain malignancy prediction and treatment. The two dimensional MRI images helps to detect and classify the brain cancer precisely and efficiently. Usually the MRI images are two dimensional and not give sufficient knowledge regarding the structure and exact size of the tumor can be removed, and the detection procedure has become more complex. Since two-dimensional images never offer the actual feeling of exactly how a tumor looks, diagnosis includes 3d tumor reconstruction, planning for surgery and biological studies. The survival rate shows gives us an exact picture of the number of patients who have survived after the tumor is identified. The 5-year and 10 year survival rate is approximately 36 percent and 31 percent respectively for persons with a cancerous brain or CNS tumor. For increasing the survival rate of brain tumor, 3d image reconstruction can be used and it is one of the best attractive features in virtual reality, especially because of its application in medical image processing. © 2021 IEEE

关键词： Tumors

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MESH COMPLETION WITH virtual SCANS

MESH COMPLETION WITH VIRTUAL SCANS

引用

IEEE International conference on Image Processing (ICIP)

作者： Chen, Kunyao Yin, Fei Wu, Baichuan du, Bang Truong Nguyen Univ Calif San Diego La Jolla CA 92093 USA

ISBN: (纸本)9781665441155

Meshes generated by range scanners are often incomplete and contain complex holes due to limited input coverage and occlusion. In this paper, we present an effective method to fill the gap regions on meshes by leveraging the templates inferred from the learning-based method. We first segment both source and template models into corresponding parts. Each part will be aligned with non-rigid deformation. We then modify the gap regions by "virtual" depth maps rendered using the aligned parts from newly selected viewpoints. Comparing with the template-based mesh completion approaches, our algorithm can generate natural appearances without any user interaction. Comparing with the state-of-the-art volumetric fusion methods, our approach supports selective blending, which only modifies the regions of interest and prevents bad template inference from impacting the source.

关键词： Mesh Completion 3d reconstruction

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Reconstructing Interactive 3d Scenes by Panoptic Mapping and CAd Model Alignments

Reconstructing Interactive 3D Scenes by Panoptic Mapping and...

引用

IEEE International conference on Robotics and Automation (ICRA)

作者： Han, Muzhi Zhang, Zeyu Jiao, Ziyuan Xie, Xu Zhu, Yixin Song-Chun Zhu Univ Calif Los Angeles Ctr Vis Cognit Learning & Auton VCLA Stat Dept Los Angeles CA 90024 USA

ISBN: (纸本)9781728190778

In this paper, we rethink the problem of scene reconstruction from an embodied agent's perspective: While the classic view focuses on the reconstruction accuracy, our new perspective emphasizes the underlying functions and constraints such that the reconstructed scenes provide actionable information for simulating interactions with agents. Here, we address this challenging problem by reconstructing an interactive scene using RGB-d data stream, which captures (i) the semantics and geometry of objects and layouts by a 3d volumetric panoptic mapping module, and (ii) object affordance and contextual relations by reasoning over physical common sense among objects, organized by a graph-based scene representation. Crucially, this reconstructed scene replaces the object meshes in the dense panoptic map with part-based articulated CAd models for finer-grained robot interactions. In the experiments, we demonstrate that (i) our panoptic mapping module outperforms previous state-of-the-art methods, (ii) a high-performant physical reasoning procedure that matches, aligns, and replaces objects' meshes with best-fitted CAd models, and (iii) reconstructed scenes are physically plausible and naturally afford actionable interactions;without any manual labeling, they are seamlessly imported to ROS-based simulators and virtual environments for complex robot task executions.

关键词： Solid modeling Three-dimensional displays Semantics Layout virtual environments Manuals Robot sensing systems

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Microphone Aligned Continuous Wearable device-Related Transfer Function: Efficient Modeling and Measurements

Microphone Aligned Continuous Wearable Device-Related Transf...

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Acoustics, Speech, and Signal Processing Workshops (ICASSPW), IEEE International conference on

作者： Wageesha N. Manamperi Thushara d. Abhayapala Paul Holmberg Audio & Acoustic Signal Processing Group Australian National University Canberra Australia Audio Capture Team Dolby Laboratories Sydney Australia

ISBN: (数字)9798350374513

ISBN: (纸本)9798350374520

With the recent emergence of virtual reality, augmented reality, and mixed-reality technologies, considerable attention has been received to integrate spatial audio recording capabilities into these devices. Extracting higher order spherical harmonics from the recordings is not always possible due to complex scattering effects from the arbitrary-shaped devices, which motivates the need for modeling the acoustic properties beyond free-field convention. In this paper, we propose modeling the wearable device-related transfer function (WdRTF) that incorporates scattering, and diffraction from the device and wearer’s body to an incident soundfield. We adopt the spherical wave model to translate the measurements into microphone alignment, by exploiting both magnitude and phase corrections. We use a discrete set of measurements by multiple circular arrays for efficiently estimating the WdRTF coefficients. We illustrate the WdRTF modeling procedure from a head-worn microphone array and obtain accurate reconstruction performance over frequency and 3d directions.

关键词： Solid modeling Array signal processing Transfer functions Scattering Harmonic analysis Acoustic measurements Microphone arrays

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Monte Carlo Physarum Machine: An Agent-based Model for Reconstructing complex 3d Transport Networks

Monte Carlo Physarum Machine: An Agent-based Model for Recon...

引用

2020 conference on Artificial Life, ALIFE 2020

作者： Elek, Oskar Burchett, Joseph N. Prochaska, J. Xavier Forbes, Angus G. University of California Santa Cruz United States

We introduce Monte Carlo Physarum Machine: a dynamic computational model designed for reconstructing complex transport networks. MCPM extends existing work on agent-based modeling of Physarum polycephalum with a probabilistic formulation, making it suitable for 3d reconstruction and visualization problems. Our motivation is estimating the distribution of the intergalactic medium—the cosmic web, which has so far eluded full spatial mapping. MCPM proves capable of this task, opening up a way towards answering a number of open astrophysical and cosmological questions. © 2020 Massachusetts Institute of Technology.

关键词： 3d reconstruction

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3d reconstruction Method Based on Aerial Sequence of UAV

3D Reconstruction Method Based on Aerial Sequence of UAV

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2020 International conference on virtual Reality and visualization, ICVRV 2020

作者： Qu, Xingzhu Zhao, Jian Sun, Yuanyuan Wang, Lele Information Center Jilin Communications Polytechnic Changchun China School of Computer Science and Technology Changchun University Changchun China College of Electronic Information Engineering Changchun University Changchun China

ISBN: (纸本)9780738142524

In response to the current problems of poor 3d reconstruction and the inability to guarantee the quality, this paper proposes a research on 3d reconstruction methods based on drone aerial photography sequences. Mainly through the SIFT algorithm, extract the same pixel matching points in each image sequence, and then use SFM technology to complete the sparse point cloud reconstruction, and finally use the CMVS algorithm to achieve point cloud clustering classification, reduce overlapping data, and use the PMVS algorithm to complete the dense point cloud reconstruction. Experiments show that the high-Altitude remote sensing image reconstructed by the proposed method has a good effect and guarantees the quality of the model. © 2020 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Sslayout360: Semi-supervised indoor layout estimation from 360◦ panorama

Sslayout360: Semi-supervised indoor layout estimation from 3...

引用

2021 IEEE/CVF conference on Computer Vision and Pattern Recognition, CVPR 2021

作者： Tran, Phi Vu Flyreel AI Research

ISBN: (纸本)9781665445092

Recent years have seen flourishing research on both semi-supervised learning and 3d room layout reconstruction. In this work, we explore the intersection of these two fields to advance the research objective of enabling more accurate 3d indoor scene modeling with less labeled data. We propose the first approach to learn representations of room corners and boundaries by using a combination of labeled and unlabeled data for improved layout estimation in a 360◦ panoramic scene. Through extensive comparative experiments, we demonstrate that our approach can advance layout estimation of complex indoor scenes using as few as 20 labeled examples. When coupled with a layout predictor pre-trained on synthetic data, our semi-supervised method matches the fully supervised counterpart using only 12% of the labels. Our work takes an important first step towards robust semi-supervised layout estimation that can enable many applications in 3d perception with limited labeled data. © 2021 IEEE

关键词： 3d modeling

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VRVideos: A flexible pipeline for virtual Reality Video Creation

VRVideos: A flexible pipeline for Virtual Reality Video Crea...

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IEEE International conference on Artificial Intelligence and virtual Reality (AIVR)

作者： Anthony dickson Jeremy Shanks Jonathan Ventura Alistair Knott Stefanie Zollmann Depart. of Computer Science University of Otago Dunedin New Zealand Depart. of Computer Science and Software Engineering California Polytechnic State University San Luis Obispo USA School of Engineering and Computer Science Victoria University of Wellington Wellington New Zealand

ISBN: (纸本)9781665457262

Recent advances in Neural Radiance Field (NeRF)-based methods have enabled high-fidelity novel view synthesis for video with dynamic elements. However, these methods often require expensive hardware, take days to process a second-long video and do not scale well to longer videos. We create an end-to-end pipeline for creating dynamic 3d video from a monocular video that can be run on consumer hardware in minutes per second of footage, not days. Our pipeline handles the estimation of the camera parameters, depth maps, 3d reconstruction of dynamic foreground and static background elements, and the rendering of the 3d video on a computer or VR headset. We use a state-of-the-art visual transformer model to estimate depth maps which we use to scale COLMAP poses and enable RGB-d fusion with estimated depth data. In our preliminary experiments, we rendered the output in a VR headset and visually compared the method against ground-truth datasets and state-of-the-art NeRF-based methods.

关键词： Headphones visualization Solid modeling Three-dimensional displays Pipelines Estimation virtual reality

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Point cloud data fitting-based reverse engineering technique for digital model updating of assembly structure 7

Point cloud data fitting-based reverse engineering technique...

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7th International conference on Mechanical Engineering and Automation (ICMEAS )

作者： Yan, Jihong ding, Huaqiu Zhang, Jinsong Wang, Pengxiang Harbin Inst Technol Sch Mechatron Engn Harbin 150001 Peoples R China

ISBN: (纸本)9781728197685

In view of the complex development process of mechanical equipment and high research and development costs, the virtual assembly technology can quickly and effectively discover the problems and risks that may occur in the assembly process of the structure. A set of general schemes for the reconstruction and updating of assembly geometric models, which are comprehensively used by three modeling methods: parametric modeling, synchronous modeling and reverse engineering modeling, are given. Taking a surface block structure with free-form surface as the measurement object, the surface of the surface block generated by 3d printing is scanned by laser, and the k-d tree topological relationship is established for the obtained point cloud data. Combining the search strategy based on k-d tree and ICP algorithm, the point cloud data scanned from different angles in the same area are spliced. Through the analysis of the surface point cloud data model of the surface block, the spatial point cloud data is mapped to the two-dimensional plane by using the projection plane method to realize triangulation, and finally complete the surface reconstruction of the surface block.

关键词： digital assembly Model reconstruction Point cloud data splicing Surface fitting reverse engineering

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