中国科学院机构知识库网格系统: 检索

基于神经辐射场的室内三维重建方法研究 学位论文 OAI收割
2024
作者: 刘湘龙

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收藏 | 浏览/下载：30/0 | 提交时间：2024/05/28

Neural implicit representation Indoor reconstruction Geometric priors Multi-resolution voxel grid Pose optimization

Interactive piecewise planar building reconstruction from a single image based on geometric priors 期刊论文 OAI收割
EXPERT SYSTEMS WITH APPLICATIONS, 2023, 卷号: 230, 页码: 15
作者: Wang, Wei; Dong, Qiulei; Hu, Zhanyi

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收藏 | 浏览/下载：22/0 | 提交时间：2023/11/17

Single-image reconstruction Geometric prior User interaction Plane optimization Convolutional neural network

TreePartNet: Neural Decomposition of Point Clouds for 3D Tree Reconstruction 期刊论文 OAI收割
ACM TRANSACTIONS ON GRAPHICS, 2021, 卷号: 40, 期号: 6, 页码: 16
作者: Liu, Yanchao; Guo, Jianwei; Benes, Bedrich; Deussen, Oliver; Zhang, Xiaopeng

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收藏 | 浏览/下载：48/0 | 提交时间：2022/02/16

3D Reconstruction Procedural Modeling Deep Learning Optimization Procedural Generation Geometric Modeling

基于非线性估计的CBCT几何标定算法 期刊论文 OAI收割
中国医学物理学杂志, 2020, 卷号: 37
作者: 尹朋飞; 冯汉升; 李实; 杨洋

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收藏 | 浏览/下载：43/0 | 提交时间：2021/11/29

cone beam computed tomography geometric calibration nonlinear optimization 锥形束计算机断层扫描几何标定非线性优化

A robust aerodynamic optimization design for airfoil based on interval uncertainty analysis method 会议论文 OAI收割
San Francisco, CA, United states, July 28, 2019 - August 1, 2019
作者: Song X(宋鑫); Zheng GN(郑冠男); Yang GW(杨国伟)

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收藏 | 浏览/下载：34/0 | 提交时间：2020/11/20

Adaptive MOPSO DFFD Geometric uncertainty Interval analysis Kriging model Robust design optimization

Optimum design of the carbon fiber thin-walled baffle for the space-based camera (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Yan Y.; Gu S.; An Y.; Jin G.

收藏 | 浏览/下载：16/0 | 提交时间：2013/03/25

The thin-walled baffle design of the space-based camera is an important job in the lightweight space camera research task for its stringent quality requirement and harsh mechanical environment especially for the thin-walled baffle of the carbon fiber design. In the paper an especially thin-walled baffle of the carbon fiber design process was described and it is sound significant during the other thin-walled baffle design of the space camera. The designer obtained the design margin of the thin-walled baffle that structural stiffness and strength can tolerated belong to its development requirements through the appropriate use of the finite element analysis of the walled parameters influence sensitivity to its structural stiffness and strength. And the designer can determine the better optimization criterion of thin-walled baffle during the geometric parameter optimization process in such guiding principle. It sounds significant during the optimum design of the thin-walled baffle of the space camera. For structural stiffness and strength of the carbon fibers structure which can been designed the effect of the optimization will be more remarkable though the optional design of the parameters chose. Combination of manufacture process and design requirements the paper completed the thin-walled baffle structure scheme selection and optimized the specific carbon fiber fabrication technology though the FEM optimization and the processing cost and process cycle are retrenchment/saved effectively in the method. Meanwhile the weight of the thin-walled baffle reduced significantly in meet the design requirements under the premise of the structure. The engineering prediction had been adopted and the related result shows that the thin-walled baffle satisfied the space-based camera engineering practical needs very well its quality reduced about 20% the final assessment index of the thin-walled baffle were superior to the overall design requirements significantly. The design method is reasonable and efficient to the other thin-walled baffle that mass and work environment requirement is requirement harsh. 2011 SPIE.

Optimal multiresolution dynamic models generation based on triangle importance (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Image Analysis and Signal Processing, IASP'2010, April 12, 2010 - April 14, 2010, Xiamen, China
作者: Zhao J.; Zhang S.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

In this paper we propose an efficient method to generate optimal multiresolution dynamic models. By the method we define the triangle importance degree as a weight parameter to be embedded to the edge contraction cost so the new metric can not only measure distance error but also reflect geometric variation of local areas. A deformation degree weight is appended to the aggregated edge contraction cost for the whole animation thus sharp features on areas with large deformation can be preserved. In addition a process of mesh optimization and validity check can further alleviate the geometric distortion of the approximations. Our approach is efficient in operation easy for implementation and as a result high quality of dynamic approximations with well-preserved fine details can be generated at any given frame. 2010 IEEE.

A local feature based simplification method for animated mesh sequence (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Computer Engineering and Technology, ICCET 2010, April 16, 2010 - April 18, 2010, Chengdu, China
作者: Wang B.; Wang B.; Zhao J.; Zhang S.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

Although animated meshes are frequently used in numerous domains only few works have been proposed until now for simplifying such data. In this paper we propose a new method for generating progressive animated models based on local feature analysis and deformation area preservation. We propose the use of solid angle and height value for a non-hyperbolic vertex to define the local feature parameter. This local factor is embedded to the vertex quadric error matrix when calculating the edge collapse cost. In order to preserve the areas with large deformation we add deformation degree weight to the aggregated quadric errors when computing the unified edge contraction sequence. Finally a mesh optimization process is proposed to further reduce the geometric distortion for each frame. Our approach is fast easy to implement and as a result good quality dynamic approximations with well-preserved fine details can be generated at any given frame. 2010 IEEE.

Animated models coarsening with local area distortion and deformation degree control (EI CONFERENCE) 会议论文 OAI收割
International Conference on Image Processing and Pattern Recognition in Industrial Engineering, August 7, 2010 - August 8, 2010, Xi'an, China
作者: Zhang S.; Zhao J.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In computer graphics applications mesh coarsening is an important technique to alleviate the workload of visualization processing. Compared to the extensive works on static model approximation very little attentions have been paid to animated models. In this paper we propose a new method to approximate animated models with local area distortion and deformation degree control. Our method uses an improved quadric error metric guided by a local area distortion measurement as a basic hierarchy. Also we define a deformation degree parameter to be embedded into the aggregated quadric errors so areas with large deformation during the animation can be successfully preserved. Finally a mesh optimization process is proposed to further reduce the geometric distortion for each frame. Our approach is fast easy to implement and as a result good quality dynamic approximations with well-preserved sharp features can be generated at any given frame. 2010 SPIE.

parametric search: three new applications 期刊论文 OAI收割
FRONTIERS OF MATHEMATICS IN CHINA, 2010, 卷号: 5, 期号: 1, 页码: 65-73
Katoh Naoki; Wang Wencheng; Xu Yinfeng; Zhu Binhai

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收藏 | 浏览/下载：15/0 | 提交时间：2011/05/23

Parametric search geometric optimization facility location