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浏览/检索结果: 共12条，第1-10条 帮助

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Monocular 3D object detection using dual quadric for autonomous driving 期刊论文  OAI收割
Neurocomputing, 2021, 卷号: 441, 页码: 151-160
作者:  Li PX(李培玄);  Zhao HC(赵怀慈)
  |  收藏  |  浏览/下载：29/0  |  提交时间：2021/03/21
Simple primitive recognition via hierarchical face clustering 期刊论文  OAI收割
COMPUTATIONAL VISUAL MEDIA, 2020, 卷号: 6, 期号: 4, 页码: 431-443
作者:  Yang, Xiaolong;  Jia, Xiaohong
  |  收藏  |  浏览/下载：24/0  |  提交时间：2021/10/26
Improved quadric surfaces recognition from scanned mechanical models 期刊论文  OAI收割
Computer Aided Drafting, Design and Manufacturing, 2016, 卷号: 26, 期号: 4, 页码: 9
作者:  Quan, Weize;  Guo, Jianwei;  Zhang, Xiaopeng;  Yan Dongming;  Yan, Dongming
  |  收藏  |  浏览/下载：35/0  |  提交时间：2017/12/29
FAST馈源支撑系统建模与协调控制研究 学位论文  OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2015
作者:  郝建林
收藏  |  浏览/下载：161/0  |  提交时间：2015/09/02
形变指纹匹配算法的研究 学位论文  OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2010
作者:  曹凯
收藏  |  浏览/下载：64/0  |  提交时间：2015/09/02
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.
收藏  |  浏览/下载：31/0  |  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.  
High accuracy star image locating and imaging calibration for star sensor technology (EI CONFERENCE) 会议论文  OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者:  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.
收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25
Today aircraft attitude measurement technology plays an important role in an aircraft system because it can provide orientation for aircraft in action. Lately star sensor technology used in aircraft attitude measurement has become more and more popular because of its high accuracy  light weight  without attitude accumulation errors and other advantages. There are three main steps for star sensor to measure aircraft attitude  star image locating  star identification and attitude tracking. The latter two steps are based on the accuracy of star image locating. So it's critical to make efforts to advance the accuracy of star image locating. Some imaging errors  such as spherical aberration or coma aberration  also have negative effect on the accuracy of star image locating  of which the effect is necessarily reduced as well. At the beginning of this article  the structure of star sensor hardware is introduced. Secondly three methods for star image locating are described specifically  which are traditional centroid method  Gauss quadric fitting method and improved Gauss quadric fitting method. Subsequently an imaging calibration method is described for the purpose of reducing the effect of imaging errors. Finally the experiment shows that the accuracy of the star sensor is 2-arc-second. 2010 SPIE.  
An improved method for generating multiresolution animation models (EI CONFERENCE) 会议论文  OAI收割
2009 11th IEEE International Conference on Computer-Aided Design and Computer Graphics, CAD/Graphics 2009, August 19, 2009 - August 21, 2009, Huangshan, China
作者:  Zhang S.
收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25
In computer graphics  animated models are widely used to represent time-varying data. In this paper  we propose an improved method to generate multiresolution animation models. We use a curvature sensitive quadric error metric (QEM) criterion as our basic measurement  which can preserve local features on the surface. We append a deformation weight to the aggregated edge contraction cost for the whole animation to preserve areas with large deformation. At last  we introduce a mesh optimization method to deal with the animation sequence  which can efficiently improve the temporal coherence and reduce visual artifacts. The results show our approach is efficient  easy to implement  and good quality progressive animation models can be generated at any level of detail. 2009 IEEE.  
The invariant representations of a quadric cone and a twisted cubic 期刊论文  OAI收割
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, 2003, 卷号: 25, 期号: 10, 页码: 1329-1332
作者:  Wu, YH;  Hu, ZY
收藏  |  浏览/下载：19/0  |  提交时间：2015/11/08