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浏览/检索结果: 共13条，第1-10条 帮助

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Baselines Extraction from Curved Document Images via Slope Fields Recovery 期刊论文  OAI收割
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, 2020, 卷号: 42, 期号: 4, 页码: 793-808
作者:  Meng, Gaofeng;  Pan, Chunhong;  Xiang, Shiming;  Wu, Ying
  |  收藏  |  浏览/下载：39/0  |  提交时间：2020/06/02
A Three-Node Triangular Element with Continuous Nodal Stress (Trig3-CNS) for Geometry Nonlinear Solid Mechanics Problems 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS, 2018, 卷号: 15, 期号: 4, 页码: 21
作者:  Zheng, Hong;  Sun, Guanhua;  Yang, Yongtao
  |  收藏  |  浏览/下载：33/0  |  提交时间：2018/12/29
Four-Node Quadrilateral Element with Continuous Nodal Stress for Geometrical Nonlinear Analysis 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS, 2018, 卷号: 15, 期号: 2, 页码: -
作者:  Yang, Yongtao;  Tang, Xuhai;  Zheng, Hong;  Liu, Quansheng
  |  收藏  |  浏览/下载：32/0  |  提交时间：2018/06/05
A Three-Node Triangular Element with Continuous Nodal Stress (Trig3-CNS) for Geometry Nonlinear Solid Mechanics Problems 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS, 2018, 卷号: 15, 期号: 4, 页码: -
作者:  Sun, Guanhua;  Yang, Yongtao;  Zheng, Hong
  |  收藏  |  浏览/下载：31/0  |  提交时间：2020/04/08
Astrometry of three near Earth asteroids with the Lijiang 2.4 m telescope 期刊论文  OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2015, 卷号: 15, 期号: 3, 页码: 435
作者:  Zhang XiLiang;  Yu Yong;  Wang XueLi;  Wang ChuanJun;  Chang Liang
  |  收藏  |  浏览/下载：25/0  |  提交时间：2021/12/06
Radial distortion invariants and lens evaluation under a single-optical-axis omnidirectional camera 期刊论文  OAI收割
COMPUTER VISION AND IMAGE UNDERSTANDING, 2014, 卷号: 126, 页码: 11-27
作者:  Wu, Yihong;  Hu, Zhanyi;  Li, Youfu
收藏  |  浏览/下载：29/0  |  提交时间：2015/08/12
perceptual video hashing robust against geometric distortions 期刊论文  OAI收割
SCIENCE CHINA-INFORMATION SCIENCES, 2012, 卷号: 55, 期号: 7, 页码: 1520-1527
Xiang ShiJun; Yang JianQuan; Huang JiWu
  |  收藏  |  浏览/下载：24/0  |  提交时间：2013/09/17
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：20/0  |  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：24/0  |  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.
收藏  |  浏览/下载：23/0  |  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.