您的位置: 专家智库 > >

国家自然科学基金(60875046)

作品数:23 被引量:62H指数:6
相关作者:魏小鹏张强肖伯祥周昌军张强更多>>
相关机构:大连大学大连理工大学湖南工学院更多>>
发文基金:国家自然科学基金辽宁省高等学校优秀人才支持计划教育部“新世纪优秀人才支持计划”更多>>
相关领域:自动化与计算机技术理学医药卫生机械工程更多>>

文献类型

  • 22篇中文期刊文章

领域

  • 18篇自动化与计算...
  • 3篇理学
  • 1篇天文地球
  • 1篇机械工程
  • 1篇动力工程及工...
  • 1篇航空宇航科学...
  • 1篇医药卫生
  • 1篇农业科学

主题

  • 4篇人脸
  • 3篇人脸识别
  • 3篇数据处理
  • 3篇数据处理方法
  • 3篇MOTION...
  • 2篇人体运动捕捉
  • 2篇特征提取
  • 2篇图像
  • 2篇光学运动捕捉
  • 2篇CAPTUR...
  • 2篇SEGMEN...
  • 1篇动画
  • 1篇独立成份分析
  • 1篇多特征融合
  • 1篇余弦
  • 1篇余弦变换
  • 1篇数据特征
  • 1篇数据特征提取
  • 1篇特征脸
  • 1篇图像加密

机构

  • 10篇大连大学
  • 4篇大连理工大学
  • 1篇湖南工学院
  • 1篇辽宁师范大学

作者

  • 10篇魏小鹏
  • 5篇张强
  • 4篇肖伯祥
  • 4篇周昌军
  • 3篇张强
  • 2篇白春光
  • 2篇吴升
  • 1篇王婵娟
  • 1篇孙晓鹏
  • 1篇纪燕杰
  • 1篇于万波
  • 1篇李翠芳
  • 1篇方小勇
  • 1篇钊小娜
  • 1篇刘瑞
  • 1篇迟春见

传媒

  • 8篇Comput...
  • 2篇计算机应用研...
  • 2篇系统仿真学报
  • 2篇应用基础与工...
  • 1篇数据采集与处...
  • 1篇计算机工程
  • 1篇小型微型计算...
  • 1篇Chines...
  • 1篇Chines...
  • 1篇Chemic...
  • 1篇中国科学:信...
  • 1篇Journa...

年份

  • 1篇2021
  • 1篇2017
  • 4篇2013
  • 6篇2012
  • 2篇2011
  • 2篇2010
  • 5篇2009
  • 1篇2008
23 条 记 录,以下是 1-10
排序方式:
A combinatorial approach to surface reconstruction被引量:1
2012年
This paper presents a reconstruction algorithm to build a surface mesh approximating an object from an unorganized point sampling of the boundary object. It combines 3D Delaunay tetrahedralization and mesh-growing method and uses only once Delau- nay triangulation. It begins with 3D Delaunay triangulation of the sampling. Then initialize the surface mesh with seed facets se- lected from Delaunay triangulation. Selection is based on the angle formed by the circumscribing ball of incident tetrahedral. Finally, grow until complete the surface mesh based on some heuristic rules. This paper shows several experimental results that demonstrate this method can handle open and close surfaces and work efficiently on various object topologies except non-manifold surface with self-intersections. It can reproduce even the smallest details of well-sampled surfaces but not work properly in every under-sampled situation that point density is too low.
XU YanZHANG QiangZHOU DongshengWEI Xiaopeng
关键词:TRIANGULATION
Reconfiguration of face expressions based on the discrete capture data of radial basis function interpolation被引量:1
2012年
Compactly supported radial basis function can enable the coefficient matrix of solving weigh linear system to have a sparse banded structure, thereby reducing the complexity of the algorithm. Firstly, based on the compactly supported radial basis function, the paper makes the complex quadratic function (Multiquadric, MQ for short) to be transformed and proposes a class of compactly supported MQ function. Secondly, the paper describes a method that interpolates discrete motion capture data to solve the motion vectors of the interpolation points and they are used in facial expression reconstruction. Finally, according to this characteris- tic of the uneven distribution of the face markers, the markers are numbered and grouped in accordance with the density level, and then be interpolated in line with each group. The approach not only ensures the accuracy of the deformation of face local area and smoothness, but also reduces the time complexity of computing.
ZHENG Guangguo ZHOU Dongsheng WEI Xiaopeng ZHANG Qiang
关键词:INTERPOLATION
Research of global illumination algorithms rendering in glossy scene被引量:2
2012年
In computer graphic (CG), illumination rendering generated realistic effect at virtual scene is amazing. Not only plausible lighting effect is to show the relative position between of the objects, but also to reflect the material of visual appearance of the vir- tual objects. The diffuse-scene rendering reflectance credibility has gradually matured. Global illumination rendering method for the glossy material is still a challenge for the CG research. Because of the shiny materials is highly energy reflection between the com- plex light paths. Whether we trace glossy reflection paths, or use of one-reflection or multi-reflection approximate above complex il- lumination transmission is a difficult working. This paper we gather some commonly used global illumination algorithms recently year and its extension glossy scene improvements. And we introduce the limitation of classical algorithms rendering glossy scene and some extended solution. Finally, we will summarize the illumination rendering for specular scene, there are still some open prob- lems.
BAI ShuangxueZHANG QiangZHOU Dongsheng
基于人脸运动捕捉的表情动画仿真研究
2013年
基于运动捕捉的动画仿真技术是当前计算机动画的研究热点.基于光学式运动捕捉系统,文中提出了一种新颖的基于交叉映射的人脸表情动画重构方法.针对RBF构建静态全局映射时嘴唇上下部分光标出现的伪关联问题,文中构建了基于功能分区的RBF交叉映射方法.在模型驱动过程中,提出一种皮肤运动机理计算得出增强标记点运动,基于增强标记点实现了基于人脸分区驱动的RBF插值方法,改进了基于人脸分区模型驱动的仿真效果.此外,设计了预计算算法提升了交叉映射和动画仿真过程的实时效率.实验证明该方法能够将同一演员的运动捕捉数据应用于任意不同人脸模型,针对相应模型生成逼真的人脸表情动画.
方小勇魏小鹏张强周昌军
关键词:表情动画RBF
Performance driven expression mapping based on segmented examples被引量:1
2012年
We present a method that combines performance-driven method with segmented 3D blendshape models to animate a face. First we prepare key sample examples and corresponding key target examples. Next we segment the whole face into two regions, for each region we reduce dimensionality of source examples using PAC into abstract space which is defined by truncated PCA eigen- vectors. Then for each example we fix the cardinal base function, which can determine the weight of the target example. Finally, in the animation stage we compute the weight of each example for each frame and add the weighted displacement vectors of each re- gion on the general face model.
YING ShuangZHANG QiangZHOU Dongsheng
关键词:SEGMENTATION
Post-illumination activity of Bi_(2)WO_(6) in the dark from the photocatalytic“memory”effect被引量:6
2021年
Photocatalysts with the photocatalytic"memory"effect could resolve the intrinsic activity loss of traditional photocatalysts when the light illumination is turned off.Due to the dual requirements of light absorption and energy storage/release functions,most previously reported photocatalysts with the photocatalytic"memory"effect were composite photocatalysts of two phase components,which may lose their performance due to gradually deteriorated interface conditions during their applications.In this work,a simple solvothermal process was developed to synthesize Bi2WO6 microspheres constructed by aggregated nanoflakes.The pure phase Bi_(2)WO_(6) was found to possess the photocatalytic"memory"effect through the trapping and release of photogenerated electrons by the reversible chemical state change of W component in the(WO_(4))^(2–)layers.When the illumination was switched off,Bi_(2)WO_(6) microspheres continuously produced H_(2)O_(2) in the dark as those trapped photogenerated electrons were gradually released to react with O_(2) through the two-electron O_(2) reduction process,resulting in the continuous disinfection of Escherichia coli bacteria in the dark through the photocatalytic"memory"effect.No deterioration of their cycling H2O2 production performance in the dark was observed,which verified their stable photocatalytic"memory"effect.
Weiyi YangYan ChenShuang GaoLicheng SangRuoge TaoCaixia SunJian Ku ShangQi Li
基于模板匹配的人体运动捕捉数据处理方法被引量:7
2010年
在光学式运动捕捉系统中,标记点往往会出现近似或对称的分布结构,这使得在对标记点进行识别时容易引起混淆。基于模板匹配的人体运动捕捉数据处理方法根据人体局部刚性结构把人体模板分割为多个子模板,使用空间仿射变换从运动捕捉数据中搜索与相应子模板误差最小的匹配点集作为最优匹配,并通过标记点跟踪实现对散乱数据的识别,解决了因标记点分布结构近似或对称而引起的混淆。对标记点缺失情况进行了重构。当出现错误匹配时系统能够自动检测并更正,整个过程无需人工干预。实验结果表明该方法能够正确识别标记点,标记点缺失情况重构效果比较理想,能够满足实时处理要求,证明了该方法的有效性。
魏小鹏刘瑞张强肖伯祥
Non-ablative controlled local hyperthermia for common warts被引量:9
2009年
Cutaneous warts are common skin diseases caused by human papillomavirus (HPV) infection. The prevalence of cutaneous warts varied from 2.4%-12.9%, with common warts, planta warts and genital warts being the most common ones. About 67% of patients with warts might resolve spontaneously within 2 years, while in some patients warts persist for years. A cellular immune response is essential for the clearance of HPV. Treatment modalities are usually ablative.
GAO Xing-hua GAO Dan SUN Xiu-ping HUO Wei HONG Yu-xiao LI Xiao-dong WANG Xiao-qin QI Rui-qun ZHANG Li GU Xiao-chuan CHEN Hong-duo
关键词:NON-ABLATIVEHYPERTHERMIA
三维网格分割的错分评价准则
2012年
提出一种新的、基于面片错分率和面积错分率的三维网格模型分割定量评价准则.定量评价是精确衡量分割效果、针对特定应用选择最有效的分割算法、以及指导新算法研究的重要基础.基于分割质量显著的数据库进行的三维分割评价准则给出的定量评价指标属于模糊的、统计性质的评价,在评价特定类型的分割时,该评价指标的可信较低、精确性较差.本文基于普林斯顿大学数据库中7类385份高质量的手工分割结果,以及7种自动分割算法中分割数目与手工分割数目相近的部分高质量数据,基于面片错分和面积错分两种准则,对7种自动分割算法进行定量了评价.实验证明本文提出的两种错分评价准则具有较高的精度和可信性.
孙晓鹏钊小娜李翠芳纪燕杰魏小鹏
关键词:网格分割
一种有效的光学运动捕捉数据处理方法被引量:3
2009年
提出一种适用于被动式光学人体运动捕捉散乱数据处理方法.该方法基于光学人体运动捕捉散乱数据的时空信息,提出了时空搜索数据处理算法.由于光学运动数据采集频率高,运动数据的前后帧之间在时间轴上成平滑线性关系,人体骨架关系的约束使得各帧数据在空间位置上遵循一定的拓扑关系.时空搜索数据处理算法合理地利用了运动数据时间轴上的线性关系和空间位置上的拓扑关系作为约束条件,有效地对三维运动数据进行了预测和跟踪,并对噪声数据进行去噪处理,对缺失运动数据提出基于刚体的补点算法,进行合理的补缺.该方法在处理过程中无需人工干预,并能满足实时性要求.
吴升张强肖伯祥魏小鹏
关键词:光学运动捕捉
共3页<123>
聚类工具0