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2016年第10期

时间:2016-11-08 14:06:29??来源:??作者:

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伍朝辉1,郭瑜1,王辉1,苗许娜2
1. 交通运输部科学研究院,北京 1000292. 河南财经政法大学,河南郑州 450052
摘要:虚拟现实技术为交通运输行业的发展带来新的机遇和挑战,对虚拟现实在交通仿真、交通事故模拟、虚拟驾驶系统、交通成果展示、交通行为心理研究、虚拟交通设备设计与维修等方面应用现状进行综述,分析目前行业应用中存在的问题并结合我国交通运输现状,对虚拟现实交通运输应用的趋势进行展望。
关键词:问题驱动;虚拟驾驶;交通仿真;虚拟现实;交通运输
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2289-10
Virtual Reality in Transportation: A Survey
Wu Zhaohui1, Guo Yu1, Wang Hui1, Miao Xiuna2
(1. China Academy of Transportation Sciences, Beijing 100029, China; 2. Henan University of Economics and Law, Zhengzhou 450052, China)
Abstract:The state-of-the-art of virtual reality application in the field of transportation was focused on. The novel virtual reality applications were summarized from the following six aspects: traffic simulation, accident simulation, virtual driving system, transportation achievements exhibition, behavior and psychology of traffic, virtual design and maintenance, and so on. The existing problems were discussed in the virtual reality application of transportation. The trends of virtual reality were proposed to try to solve the real traffic problems based on the transportation status of China.
Keywords: problem-driven; virtual driving; traffic simulation; virtual reality; transportation
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数码人像照片美感评价研究
陶则恩,普园媛,徐丹,刘屹位
(云南大学信息学院,昆明 650504)
摘要:计算美感评价是一个具有挑战性的研究方向,随着数码产品广泛使用,人们对数码产品的智能化需求提高,数码照片的数量呈爆炸式增长,怎样判断这些照片的好坏呢?传统的照片美感评价主要靠专家或摄影者凭借自己对美的理解进行主观判断,不仅速度慢,还带有很强的主观性。主要通过人脸、人眼检测,提取了数码人像的人脸比例、视觉平衡等特征,对数码人像照片美感进行评价,并与主观评价获取实验进行了比较分析。实验结果表明虽然计算美感评价与主观评价有些差异,但计算美感评价指标明确,具有一定的客观性。
关键词:计算美学;美感评价;照片结构;人脸检测;人眼开度
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2298-06
Aesthetic Assessment for Digital Portrait Photos
Tao Zeen, Pu Yuanyuan, Xu Dan, Liu Yiwei
(School of Information Science and Engineering, Yunnan University, Kunming 650504, China)
Abstract: Computational aesthetic evaluation is a challenging research. With the widespread use of digital products, it needs to improve the intelligence of digital products. How are these photos judged good or bad? The traditional photo aesthetic quality evaluation mainly is done based on subjective judgment or experts or the photographer's understanding for beauty. It is not only slow, but also with highly subjective. The results of face detect and eye detect were used to calculate visual balance of digital portrait based on face proportion and other features for aesthetic assessment of digital portrait photo were extracted too. The computer aesthetic score were compared with the subjective evaluation. The results show that, although the computer aesthetic score are different from the subjective evaluation, the computer aesthetic assessment has clear and objective evaluation criteria.
Keywords: computational aesthetics; aesthetic quality assessment; photo structure; face detection; human eye opening
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区域可信度融合的彩色纹理图像分割方法
杨勇1,2,郭玲1,代文征1,叶阳东2
1. 黄河科技学院信息工程学院,郑州 4500632. 郑州大学信息工程学院,郑州 450060
摘要:提出一种将颜色信息与纹理信息有机结合的彩色纹理图像分割方法。通过对多尺度结构张量纹理信息进行奇异值分解与主成分分析降维,得到压缩多尺度纹理信息,同时与尺度信息、颜色信息相结合的方式来提高彩色纹理特征的描述能力针对分割区域容易出现过分割与错误分割现象,采用区域的邻接关系、区域的大小、区域的公共边、以及区域间的J-散度距离来共同计算相邻区域间的可信融合度,通过合理判别,删除与融合可信度较低的区域。并在合成彩色纹理图像与自然纹理图像上进行大量的实验对比与分析,验证提出方法具有较高的准确率,且最终分割区域具有较高的区域整体性与地面真实性。
关键词:区域可信融合;彩色纹理;图像分割;多层图割模型
中图分类号:TP391.04????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2304-09
Regional credible fusion based color-texture image segmentation approach
Yang Yong1,2, Guo Ling1, Dai Wenzheng1, Ye Yangdong2
(1. School of Information Engineering, Huang He Science and Technology College, Zhengzhou 450063, China; TuEag8879环亚手机|首页主页
2. School of Information Engineering, Zheng Zhou University, Zhengzhou 450060, China)
Abstract: An approach is proposed based on the combined color information and texture information for color-texture image segmentation. The compacted multi-scale texture information is extracted by using singular value decomposition and principal component analysis dimension reduction under decomposing the multi-scale structure tensor, and then it is integrated with scale information and color information for improving the description ability to color-texture. To avoid the phenomenon such as over-segmentation and error segmentation appeared, the regional credible fusion degree is computed by combining four kinds of region information, such as region adjacency relationship, region size, common edge between regions, and J-divergence distance. Meanwhile, through the reasonable judgment we can merge and delete some regions which own the lower regional credible fusion degree. Then, a substantial of experiment analysis and comparison are carried out on some synthesis color-texture images and real natural scene images, which demonstrate the superiority of our proposed method, such as the high segmentation accuracy, outperforming visual entirety and closing to ground truth.
Keywords: regional credible fusion; color-texture; image segmentation; multilayer graph cut model
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Web3D山地场景中多智能体mACO路径规划算法
闫丰亭,贾金原
(同济大学,上海 201804)
摘要:山地场景数据量大,路径规划算法复杂,难以在网页上精确显示,通常采用的基于等高线的势能路径规划,往往得不到最优路径,且容易被隔断在悬崖下面。为解决以上问题,提出并实现了Web3D上的mACO (mountain ACO)路径规划算法,并在Web3D上实现了基于平面网格的pgACO (planar grid ACO)路径规划算法,以及一个Web3D上的A*路径规划算法。再以典型战斗场景为案例,针对mACO算法、pgACO算法以及A*算法,就实现效果、效率、网页刷新率(FPS)做了对比实验,结果显示,三种算法均可达到实时性,但mACO算法规划的路径更加精确。最后根据规划出来的最优路径,采用leader-follower思想,在Web3D上实现了实时高效的多智能体路径规划方案
关键词:Web3D山地场景;mACO算法;平面网格pgACO算法;A*算法;多智能体路径规划
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2312-09
Multi-agent Path Planning mACO Algorithm in Web3D Mountain Scene
Yan Fengting, Jia Jinyuan
(Tongji University, Shanghai 201804, China)
Abstract: There is amount of data in a mountain scene, and the path planning algorithm in it is very complex, so it is not impossible to be shown detailed in Web. Usually the common potential path planning using contours can not find an optimal path because the path is easily cut under the cliff. To solve the above problems, a mACO (mountain ACO) path planning algorithm was addressed for the Web3D application, a planar grid ACO path planning algorithm and a A* path planning were completed in Web3D environment. Then a typical battle scene case was used for the three kinds of algorithms to be compared in effectiveness, efficiency, and FPS. The result can be seen that all the three kinds of algorithms are real-time, but the mACO algorithm is more accurate than the others. Based on the optimal path and using leader-follower idea, a real-time effective multi-agent path planning is implemented.
Keywords: Web3D mountain scene; mACO (mountain ACO) algorithm; planar grid ACO algorithm; A* algorithm; multi-agent path planning
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基于网格映射的虚拟视点合成
姚莉1,2,3,吴琼颖3,许辉3
(1.计算机网络和信息集成教育部重点实验室(东南大学),南京 211189;2.计算机软件新技术国家重点实验室(南京大学),南京 210023;3.东南大学计算机科学与工程学院,南京 211189)
摘要:由于深度不准确、遮挡以及相邻参考视点曝光不同等原因,基于深度图的绘制技术(DIBR)会产生空洞、重影等一系列问题,同时修复空洞需要消耗大量时间,提出基于网格映射的虚拟视点合成方法,以轮廓为基础在图像中构建网格,以网格三角形为映射单元,并通过能量约束进行映射生成虚拟视点图像。利用融合算法将不同视点的图像进行融合,得到最终的虚拟视点图像。算法相比于传统的DIBR中像素为单元的处理方式在合成图像质量相当的前提下具有更快的处理速度。
关键词:边缘检测;网格化;纹理映射;网格映射
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2321-08
Virtual Viewpoint Synthesis Based on Grid Mapping
Yao Li1,2,3, Wu Qiongying3, Xu Hui3
(1. Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education, Nanjing 211189, China; 2. State Key Laboratory for Novel Software Technology (Nanjing University), nanjing 210032, China; 3. School of Computer Science and Engineering, Southeast University, Nanjing 211189, China)
Abstract: Due to imperfect depth maps, occlusion and the illumination difference between reference images, annoying artifacts, such as holes and ghost edges, appearing in the rendering image by DIBR, holes filling being time-consuming, triangle mesh based on the depth contour and maps mesh triangles with energy constrains were created. Image fusion algorithm merged different viewpoint images and got final virtual viewpoint image. While DIBR warped the image with pixels, triangles were mapped with. Compared with the traditional DIBR, the proposed algorithm has a faster processing speed than the traditional pixel based processing method in the same image quality.
Keywords: edge detection; grid; texture mapping; grid mapping
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基于K-means聚类的RGBD点云去噪和精简算法
苏本跃1,2,马金宇1,2,彭玉升2,3,盛敏2,3
(1. 安庆师范大学计算机与信息学院,安徽 安庆 246133;2. 安徽省智能感知与计算重点实验室,安徽 安庆 246133;3. 安庆师范大学数学与计算科学学院,安徽 安庆 246133)
摘要:针对Kinect等深度相机扫描获取的点云数据数量庞大、噪声较多的问题,提出一种特征保持的点云去噪和精简算法。使用K-D树快速分类点云;通过曲率估计算法得到局部曲面的曲率值;使用K-means聚类算法对点云进行聚类,对每个类中的点,根据点到聚类中心的欧式距离和邻近点曲率变化判断是否为噪声点;通过保持特征的点云精简算法实现对点云数据的简化。实验结果显示,算法快速有效,对于去除大量外部噪声有良好效果,且精简后的点云数据保持了原始点云特征
关键词:K-means聚类;点云去噪;点云精简;RGBD数据
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2329-07
Algorithm for RGBD Point Cloud Denoising and Simplification Based on K-means Clustering
Su Benyue1,2, Ma Jinyu1,2, Peng Yusheng2,3, ShengMin2,3
(1. School of Computer and Information, Anqing Normal University, Anqing 246133, China;TuEag8879环亚手机|首页主页
2. The University Key Laboratory of Intelligent Perception and Computing of Anhui Province, Anqing 246133, China;3. School of Mathematics and Computational Science, Anqing Normal University, Anqing 246133, China)
Abstract: Aiming at the problem that the point cloud data scanned by Kinect or other depth camera have a huge number and more noise, a feature preserving method for point cloud denoising and simplification was proposed. This algorithm classified the point cloud?rapidly by K-D tree; find The corresponding surface curvature values were obtained using curvature estimation algorithm; The K-means clustering algorithm for point cloud clustering was used. For each point in the cluster, the Euclidean distance was depended on between the point and center of the cluster and the change of the near points curvature to determine whether the noise points. The point cloud data was simplified by the feature preserving method.The experimental results show that the denoising and feature preserving point cloud simplification method is quickly and efficiently, for the removal of a large number of external noise has a positive effect, and the streamline point cloud data have the retention of original point cloud features.
Keywords: K-means clustering; point cloud denoising; point cloud simplification; RGBD data
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一种基于多样例的三维颅骨缺失修补方法
热孜万古丽·夏米西丁1,2,耿国华1*,古丽松·那斯尔丁2,邓擎琼3,迪丽努尔·克依木2,祖丽皮亚·买买提明2,赵万荣4,郑磊4
(1.西北大学信息科学与技术学院,西安 710069;2.新疆师范大学计算机科学技术学院,乌鲁木齐 830054;3.北京师范大学信息科学与技术学院,北京 100875;4.托克逊县人民医院 放射科,新疆 吐鲁番 838100)
摘要:针对刑侦及考古中的遗骨经常存在缺损的问题,提出一种基于多样例的三维颅骨缺失修补方法。构建三维颅骨样本库,并通过配准算法对所有样本进行规格化处理;利用同样的配准算法根据待修补颅骨的缺失情况把样本库中的每个样本对应地分为存留和缺失两部分数据;通过回归算法获得两部分数据之间的函数关系;利用该函数关系计算待修补颅骨的缺失数据,并通过拼接融合得到最终的结果。实验结果表明,该方法能有效修补大、小缺失,同时保留原模型的所有特征;此外,避免了现有基于样例方法带个性特征的缺陷,修补误差更小。
关键词:三维模型修补;多样例;颅骨;回归
中图分类号:TP399????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2335-07
3D Skull Surface Completion Method Based on Multi-exemplars
Reziwanguli Xiamixiding1,2, Geng Guohua1, Gulisong Nasierding2, Deng Qingqiong3, Dilinuer Keyimu2, Zulipiya Maimaitiming2, Zhao Wanrong4, Zheng Lei4
(1. School of Information and Technology, Northwest University, Xi'an, 710069, China; 2. College of Computer Science and Technology, Xinjiang Normal University, Urumchi 830054, China; 3. College of Information Science and Technology, Beijing Normal University, Beijing 100875, China; 4. Department of Radiology, Peoples Hospital of Toksun, Turpan Xinjiang 838100, China)
Abstract: In order to repair the damaged skulls, a skull completion method based on multiple exemplars was proposed. A 3D skull model database was constructed, and all the exemplars within the database were registered with a standard skull model. Each exemplar was then divided into a missing part and a remaining part according to the given damaged skull. After that, the relationship between the missing part and the remaining part was obtained by a regression algorithm. This relationship was used to calculate the missing part of the given skull, and a complete skull could be obtained by merging the two parts. Experimental results demonstrate that the proposed method can repair small and large damages well while keep the original model unchanged. In addition, it can improve the completion accuracy compared with the existing example-based methods.
Keywords: 3D model completion; multi-exemplar; skull; regression
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非规则投影曲面深度感知几何校正研究
白宝兴,杨帆,韩成,张超
(长春理工大学计算机科学技术学院,吉林 长春 130022)
摘要:为了提高投影仪投射场景的普适性,提出了一种非规则投影曲面深度感知几何校正方法。通过对耦合性理论分析提出了削弱耦合的解决方案采用编码的彩色结构光对非规则投影曲面进行深度获取;利用反馈式求解可视化最大投影区域,使得投影校正后的图像能够在该区域显示;利用动态分层算法对非规则曲面深度信息进行分层平面的抽离,对各个分层平面解算对应的单应性矩阵,构建单应性矩阵集合对投影图像进行几何畸变消除。通过实验分析可知,将投影图像投射到非规则曲面中,能得到校正后投影图像符合观测者的正常视觉感知。
关键词:计算机视觉;非规则曲面;几何校正;彩色结构光;深度感知
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2342-08
Study on Irregular Projection Surface Depth Perception Geometric Correction
Bai Baoxing, Yang Fan, Han Cheng, Zhang Chao
(School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China)
Abstract: In order to improve the universality of the projector projection scene, a method of depth perception geometric correction on the irregular projection surface was proposed. With the theoretical analysis of the coupling, the weaken coupling solution was proposed. The depth of the irregular projection surface could be acquired by the encoded color structured light. After that, the feedback was used to solve the maximum visual projection area, the dynamic slicing algorithm for the irregular surfaces depth information was used to pull away the stratification planes, so a corresponding homography matrix for each stratification plane was calculated and the homography matrix set was constructed to eliminate the geometric distortion of the projected image. Through the experimental analysis, it is known that the projected image is projected to the irregular surface, and the corrected projection image can be in line with the observer normal visual perception
Keywords: computer vision; irregular surfaces; geometric calibration; color structured light; depth perception
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一种基于单目SLAM的无人机序列图像拼接方法
马跃龙1,赵勇2,曹雪峰1
(1.信息工程大学,河南 郑州 450002;2.西北工业大学,陕西 西安 710072)
摘要:由无人机序列图像生成正射影像图是获取大范围正射影像图的一种有效方法。基于SfM生成正射影像图的方法计算量大,耗时长,所生成的正射影像图可视化效果较差。设计了基于单目SLAM的无人机序列图像增量式拼接算法,实现了大范围场景正射影像图的实时生成。通过单目SLAM系统实时估计相机位置与姿态,获取无人机飞行轨迹,同时生成3D点云地图。通过SLAM环路检测与基于位姿图的局部优化,有效降低了估计误差累积的影响,在保持估计精度的同时实现了优化操作的最小化。利用所提出的自适应权重的多频带算法,实现正射影像图的实时拼接融合与显示。通过实验验证了本方法的实时性与有效性。
关键词:序列图像;图像拼接;正射影像图;单目SLAM
中图分类号:TP346.2????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2349-07
Mono-SLAM Based Method for Stitching Images of Sequence From UAV
Ma Yuelong1, Zhao Yong2, Cao Xuefeng1
(1.????? Information Engineering University, Zhengzhou 450002, China; 2. Northwestern Polytechnical University, Xi’an 710072, China)
Abstract: It is an effective method to generate orthoimage from image sequence obtained from UAV. Most of the SfM-based methods for generating orthoimage are expensive computation and need hours or more to process image sequence, but the orthoimages generated finally are not satisfactory most of the time. An algorithm to stitch image sequence obtained from UAV incrementally was designed based on monocular SLAM generating orthoimage for large-scale instantaneously. Through the flow of SLAM, the system could estimate the position and attitude of the camera and the trajectory of UAV, meanwhile, generate a map of 3D point cloud. With the detection of loop-closure within SLAM and local optimization based on pose-graph, the system could minimize the impact of error accumulation and the computation for optimization, meanwhile, retain the accuracy. With the proposed adaptive weighted multiband algorithm, the system could fuse and visualize the orthoimage instantaneously. The experiment results demonstrate the efficient and effective of the proposed algorithm.
Keywords: image sequence; image stitching; orthoimage; mono slam
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基于Voronoi图的室内布局评价方法
刘米兰1,2,3,蒋浩1,2,毛天露1,2,王兆其1,2
(1.中国科学院计算技术研究所,北京 100190;2.移动计算与新型终端北京市重点实验室,北京 100190;3.中国科学院大学,北京 100049)
摘要:三维室内模型可以用于指导现实生活中的室内物体布局。由于室内场景布局问题自身的评价指标存在多态性和模糊性,难以用精确的数据来评价一个室内场景布局方案的优劣。为了从使用者的角度对室内场景布局进行客观的评价,提出一种基于Voronoi图的室内布局评价方法结合室内设计领域和机器人路径规划领域的知识,使用Voronoi图在室内场景中规划动线,用仿真计算的方法从场景中动线的通畅度、平滑度以及区域分布均匀度等方面对场景布局方案进行客观评价。
关键词:Voronoi图;室内布局;动线;布局评价
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2356-07
Evaluation Method for Interior Layout Based on Voronoi Diagram
Liu Milan1,2,3, Jiang Hao1,2, Mao Tianlu1,2, Wang Zhaoqi1,2
1.???????? Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China; 2. Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing 100190, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: Three-dimensional interior model can be used to guide the indoor objects layout in real life. It is hard to evaluate an interior layout by a precise data because of the polymorphism and fuzzy of the evaluation problem of interior layout itself. In order to evaluate an interior layout objectively from the user’s view, an evaluation method for interior layout was proposed based on Voronoi Diagram. This method combined the knowledge of interior design and robot path planning, and generatedmoving lines in the scene by Voronoi Diagram. It could evaluate the interior layout objectively from aspects of patency, smoothness of moving lines.
Keywords: Voronoi Diagram; interior layout; moving lines; evaluation for layout
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基于用户生成标签的多视角特征学习方法
田枫1,尚福华1,刘卓炫1,沈旭昆2
(1. 东北石油大学计算机与信息技术学院,大庆 163318;2. 北京航空航天大学虚拟现实技术与系统国家重点实验室,北京 100191)
摘要:提出了一种基于用户生成标签的多视角特征学习方法。采用词袋模型分别得到媒体的内容特征表示和标签特征表示;通过媒体词汇和文本词汇的相关性建模,学习文本特征空间和内容特征空间的映射模型。在此基础上,给出了优化前后的特征表示具备近似等距映射保持的理论依据。该方法相对数据集规模具备线性时间复杂度,适用于大规模数据集,具备多视角特征融合能力。基准数据集上测试表明,优化后的特征表示较特征拼接和相关成分分析等方法鉴别力更强。
关键词:多视角特征;多视角学习;用户生成标签;特征学习
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2362-07
Multi-View Feature Learning based on User Contributed Tag
Tian Feng1, Shang Fuhua1, Liu Zhuoxuan1, Shen Xukun2
(1. School of Computer and Information Technology, Northeast Petroleum University, Daqing 163318, China;TuEag8879环亚手机|首页主页
2. The State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China)
Abstract: A multi-view feature learning method based on user contributed tag was proposed. Bag-of-words representation for content feature and textual feature was learned. A multi-view feature learning framework was proposed to explicitly model the relevance between multimedia object and tags by learning a linear mapping from textual representation to visual representation. The learned feature encoded the information conveyed by original feature, and inner products of leaned features were preserved with a high probability with visual features and textual features. The complexity of the method is linear with respect to the size of dataset. Furthermore, the method can be extended to deal with more than two views. The performance of the proposed method indicts it’s superiority over other representative method.
Keywords: multi-view feature; multi-view learning; user contributed tag; feature learning
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基于空间线索时域梯度的音频关注度计算模型
杭波,王毅,康长青,黄健
(湖北文理学院数学与计算机科学学院,湖北 襄阳 441053)
摘要:虚拟现实中方位快速变化的音频信号应当具有较高的关注度,但现有自底向上音频关注度计算模型提取底层音频特征如能量、基音、过零率等,无法有效表达该类信号引起的音频关注度,有可能造成漏检。针对此问题,基于空间信息对关注产生影响的心理学原理,引入空间线索短时变化梯度,用以度量单声源空间方位快速变化引起的关注。计算由各子带空间线索组成的空间线索矢量的短时变化均值作为空间线索变化梯度,建立基于空间线索变化梯度的音频关注度模型。与当前音频关注度计算模型相比,关注音频的检出率提高了4.5个百分点。
关键词:音频;关注度计算模型;空间线索;梯度
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2369-09
Spatial Cues Gradient in Time Domain Based Audio Attention Computational Model
Hang Bo, Wang Yi, Kang Changqing, Huang Jian
(School of Mathematics and Computer Science, Hubei University of Arts and Science, Xiangyang 441053, China)
Abstract: In virtual reality audio, sound source whose directions change rapidly should have higher attention level. But present bottom-up audio attention computational models extract the underlying characteristics of single channel audio such as energy, pitch, zero crossing rate etc., which can not effectively express the audio attention caused by such signals. To solve this problem, based on the psychological principles that spatial information affects attention, a model was proposed to introduce the short-term spatial gradient cues to measure the attention caused by the single audio source space direction changing. Compared to the traditional audio attention computational model, the recall of detection of attention audio events increased 4.5 percentage points in experiments.
Keywords: audio; attention computational model; spatial cues; gradient
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基于Kinect的实时360度虚拟试衣
张晓丽,姚俊峰,黄萍
(厦门大学软件学院数字媒体技术研究中心,福建 厦门 361005)
摘要:很多虚拟试衣系统只研究人机交互和服装模拟,不能做到衣服模型随人体进行360度旋转。为解决该问题,提出基于Kinect运动预测的虚拟试衣改进方法。借助Kinect获取使用者身上的骨骼特征点进行实时追踪,根据得到的头部关节点信息和彩色图像,进行人脸检测,判断出使用者的前后面。对左右肩部关节点信息进行基于灰色模型的运动轨迹预测,当关节点深度坐标发生跳变时,对Kinect获得的数据进行纠正。该方法有以下优点:真实感,系统实现了360度虚拟试衣;实时性,灰色预测能快速得出预测结果,实现衣服模型随人体实时旋转。实验结果表明该3D虚拟试衣系统试衣效果良好。
关键词:Kinect;骨骼特征点;人脸检测;灰色预测;360度旋转
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2378-08
360-Degree Virtual Fitting Based on Kinect
Zhang Xiaoli, Yao Junfeng, Huang Ping
(Center for Digital Media Computing, Software School, Xiamen University, Xiamen 361005, China)
Abstract: A lot of virtual fitting systems only study human-computer interaction and clothing simulation, but they can’t make clothes model to rotate 360 degree along with human. To solve this problem, an improved method of virtual fitting based on Kinect using motion prediction was proposed. With the help of Kinect, the skeleton feature points of user for real-time tracking were obtained. According to the obtained information of the joint point of the head and color image, face was detected and judging the front or back of the user. The motion trajectory of the left and right shoulders’ joint points based on gray model was predicted. When the depth coordinates of joint point varied sharply, the data was corrected that Kinect obtained. The proposed method has the following advantages: Sense of reality, the system realizes the real-time 360 degree virtual fitting; Real-time, the gray forecast can predict the result quickly, which achieves real-time rotation of clothing model with the human body. Experimental results show that the 3D virtual fitting system can achieve a better fitting effect result.
Keywords: kinect; skeletal characteristic points; face detection; gray prediction; 360 degree rotation
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基于拓扑分析的二维时变矢量场可视化
李超1,吴玲达1,赵彬2
(1. 装备学院,北京 101416;2. 中国洛阳电子装备试验中心,洛阳 471000)
摘要:流动是自然界中的基本现象,是科学研究与工程实践的重要研究对象。流场可视化能够直观地描述流场,对流体运动的观测和分析具有重要辅助作用。真实流场都是时变流场,传统的流场可视化手段无法反映流体的运动趋势和内部运动差异。在分析时变矢量场可视化需求的基础上,对流场拓扑给出了新的定义,结合计算流体力学中关于拉格朗日拟序结构的研究,选取了两个典型的二维时变矢量场进行了拓扑分析,并以此对几何可视化的结果进行了优化。试验结果表明,基于拓扑分析的二维矢量场可视化能够通过提取时变流场中具有时空一致性的结构,提升研究者对于流动过程的理解,同时有效刻画流场中不同区域存在的流动特性差异,为深入理解流动开拓了新的观测和分析手段。
关键词:流场可视化;拓扑分析;时变流场;矢量场;拉格朗日拟序结构
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2385-09
Visualization of 2D Dynamic Vector Fields Based on Topology Analysis
Li Chao1, Wu Lingda1, Zhao Bin2
(1. Equipment Academy, Beijing 101416, China; 2. Electronic Equipment Test Center, Luoyang 471000, China)
Abstract: Flow is one of the most fundamental phenomenon in natural world. Flow visualization can give an intuitive view of flow fields and contribute to the observation and analysis of flow. Real flow fields are all dynamic while traditional visualization approaches are not able to reflect the trends of flows or the diversity inside them. Based on the research of Lagrangian Coherent Structures in Computational Fluid Dynamics, the concept of flow field topology was redefined, two typical 2D dynamic vector fields were selected for topology analysis, and the results were used to optimize the visual effects of geometric visualization. Experiments show that visualization of 2D dynamic vector fields based on topology analysis can extract the coherent structures of flows which are helpful to the comprehension of flow for researchers and description of characteristic difference inside flows.
Keywords: flow visualization; topology analysis; dynamic flow fields; vector fields; Lagrangian Coherent Structures
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图形驱动感知的异构硬件高效绘制模型
艾志玮,曹 轶,肖 丽,王华维
(北京应用物理与计算数学研究所,北京 100094)
摘要:随着图形3D加速硬件技术的日益成熟,异构硬件高效绘制模型是提高大规模数据可视化交互性能的有效手段之一。它提出一种图形驱动智能感知的异构硬件高效绘制模型,采用运行时虚拟层技术、冗余式图形驱动池、运行时智能感知方法和图形驱动库动态加载技术等关键技术,实现复杂环境驱动架构和图形驱动库的自适应匹配,提高图形绘制的交互性能。在高置信度核反应堆中子体平均通量的可视分析实际应用中,异构硬件绘制模型的交互性能可获得约为14倍加速比,具有一定的实用性。
关键词:智能感知;虚拟层;图形驱动架构;绘制模型
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2394-06
Graphics-Driver-Awared Heterogeneous Hardware-Accelerated Rendering Model
Ai Zhiwei, Cao Yi, Xiao Li, Wang Huawei
(High Performance Computing Center, Institute of Applied Physics and Computational Mathematics, Beijing 100094, China)
Abstract: As 3D graphics acceleration hardware technologies become more sophisticated, heterogeneous hardware-accelerated rendering model is one of effective means to improve interactive performance of large-scale data visualization. A graphics-driver-awared heterogeneous hardware-accelerated rendering model was proposed, and adaptive matching graphics architecture and graphics driver library in complex environment-improved the interactive performance of graphics rendering. Key technologies include runtime virtual layer technology, redundant graphics driver pool, running IntelliSense methods and graphics driver library dynamic loading technology. In practical application of visual analysis of nuclear reactor average flux, interactive performance of heterogeneous hardware rendering model available about 14 times speedup, has a certain practicality.
Keywords: intellisense method; virtual layer;graphics driver architecture; rendering model
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带形状控制的二次有理三角样条曲线
刘新儒1,2,魏曼曼1,刘圣军1,2*,杨当福1
(1. 中南大学数学与统计学院,长沙 410083;2. 中南大学工程建模与科学计算研究所,长沙 410083)
摘要:利用函数值及其一阶导数来构造带形状控制的二次有理三角样条曲线.从理论上详细讨论了该插值曲线格式的值控制拐点控制,并从最优化角度结合设计目标,给出了拐点位置计算的最优化方法.实例表明,该曲线格式及优化方法可用于造型设计.
关键词:有理三角样条;值控制;拐点控制;最优化
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2400-07
Quadratic Rational Trigonometric Spline Curves with Shape Controlling
Liu Xinru1,2, Wei Manman1, Liu Shengjun1,2*, Yang Dangfu1
(1. School of Mathematics and Statistics, Central South University, Changsha 410083, China; 2. Institute of Engineering Modeling and Scientific Computing, Central South University, Changsha 410083, China)
Abstract: A new quadratic rational trigonometric spline curve with a shape parameter was proposed. The value control and the inflection-point control of the interpolation scheme were discussed in theory. And the optimal methods for calculating the desired inflection-points was proposed, by using optimization theory. Numerical experiments show the interpolation spline and the optimization method can be used in modeling design.
Keywords: rational trigonometric spline; value control; inflection-point control; optimization
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在线片元剔除的多片元效果高效绘制方法
周果1,2,3,朱登明1,2,王兆其1,2,魏毅1,2
(1.中国科学院计算技术研究所,北京 100190;2.移动计算与新型终端北京市重点实验室,北京 100190;3.中国科学院大学,北京 100049)
摘要:多片元效果有实时透明等重要应用,它按深度顺序处理每个像素的所有片元。已有的k-buffer算法在单遍绘制场景时,剥取并缓存距离视点最近的多个片元,这需要避免缓存更新时的读写冲突,降低了在复杂场景上的计算效率。对此提出利用帧间的时空相关性,允许单遍绘制时在线地剔除缓存外片元的方法。描述建立半堆结构的片元缓存的过程,分析最坏情况下的时间复杂度,在绘制每帧时反向重投影构造剔除界面。由于减少了缓存更新操作且不需要预处理,复杂场景特别在被漫游或发生变化时的绘制效率被显着提高。
关键词:深度剥离;堆排序;片元临界区;反向重投影
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2407-08
Online Fragment Culling for Efficient Rendering of Multi-Fragment Effects
Zhou Guo1,2,3, Zhu Dengming1,2, Wang Zhaoqi1,2, Wei Yi1,2
(1.????? Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China; 2. Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing 100190; 3. University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: Multi-fragment effects such as real-time transparency are rendered by visiting the per-pixel fragments in depth order. The k-buffer algorithm rendered the scene in a single pass to obtain several layers of fragments. The read-modify-write hazard while updating the buffer should be avoided thus the performance was likely to be hit hard. The temporal and spatial coherence among frames were exploited to cull the input fragments in an online manner. A fragment cache based on a semi-heap was proposed. The worst case scenario of the time complexity was analyzed. The reverse reprojection was employed to construct the culling interface on the fly while rendering a frame. Since the buffer updating operations are effectively reduced and no preprocessing is required, the complexity scene during walkthrough or changing can be rendered efficiently.
Keywords: depth peeling; heap sort; fragment interlock; reverse reprojection
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一种支持水下虚拟维修的高层仿真描述模型
纪连恩,孙瑞生,栾琪
(中国石油大学(北京)地球物理与信息工程学院,北京 102249)
摘要:水下油气作业的虚拟维修仿真中涉及多种维修案例,而现有的建模技术侧重于仿真实体及场景的几何属性和物理属性等底层模型描述,缺乏从高层应用角度对动态作业流程进行抽象和描述。为此,提出并建立了一种支持水下虚拟维修的高层仿真描述模型HDMUM(A High-level Descriptive Simulation Model for Underwater Virtual Maintenance)。该模型分别对组成水下虚拟维修的三要素:仿真实体,作业场景和维修作业流程从高层应用的角度进行抽象和描述,以动态维修流程为核心建立它们之间的逻辑关系,支持用户在应用层灵活构建不同维修案例,最后通过应用实例验证了模型的合理性和可行性。
关键词:虚拟维修;动态维修流程;HDMUM模型;XML脚本
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2415-08
High-level Descriptive Simulation Model for Underwater Virtual Maintenance
Ji Lianen, Sun Ruisheng, Luan Qi
(College of Geophysics and Information Engineering, China University of Petroleum, Beijing 102249, China)
Abstract: The virtual simulation of underwater maintenance for oil and gas production involves a variety of maintenance processes and training cases. However, the existing modeling techniques mainly focused on the description of low-level model, such as geometric and physical properties, but lacked of abstraction and description of high-level application for the dynamic maintenance process. So a High-level Descriptive Simulation Model for Underwater Virtual Maintenance (HDMUM) was proposed. Three parts of simulation model, i.e., simulation entity, operation scene and maintenance process, were abstractedand described from the high-level application. All of the HDMUM components and their relationship were designed to build and realize the dynamic maintenance process, which is the core of whole model. The application examples showed that the HDMUM can support users to build different simulation cases flexibly and efficiently.
Keywords: virtual maintenance; dynamic maintenance process; HDMUM; XML script
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基于ARM的视频流实时稳像增强算法
陈晓权,张磊,黄华
(北京理工大学计算机学院,北京 100081)
摘要:针对ARM处理器的性能特点,提出一种在几何变换空间内进行视频抖动检测和运动平滑的高效视频稳像增强算法。首先通过平移和旋转分量的振幅变化检测视频流中出现的抖动;然后对平移向量和旋转角度进行线性插值,获得平滑路径的最优变换;最后分别对平移和旋转变换进行运动补偿,生成稳定的视频帧。由于采用刚性变换空间中的线性插值,该算法的计算速度要远高于以往算法,而且可以有效控制补偿后视频帧的裁剪率并保证不会出现画面扭曲现象。实验结果表明,该算法能够在基于ARM处理器的平台上实现视频流实时稳像处理,并输出令人满意的稳定视频
关键词:视频稳像;实时;刚性变换;抖动检测
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2423-08
ARM-Based Real-Time Video Stabilization Enhancement Algorithm
Chen Xiaoquan, Zhang Lei, Huang Hua
(School of Computer Science, Beijing Institute of Technology, Beijing 100081, China)
Abstract: Considering the performance characteristic of ARM processor, an ARM-based real-time video stabilization enhancement algorithm was proposed that identified shakiness of video and implements motion smoothing in the space of geometric transformations. The algorithm identified the shakiness of video with the amplitudes’ change of translation and rotation. Then the optimal path could be obtained by linear interpolation on translational vector and rotational angle. Stable frames were generated by implementing motion compensation of translation and rotation transformations respectively. Because the algorithm used linear interpolation in the space of rigid transformations, it was much faster than the previous algorithms. Moreover, it could control cropping ratio in motion compensation and guarantee no extra distortion drawn into the warped frames. Experiments show that the algorithm can stabilize video based on ARM platform in real time and obtain good video stabilization as well.
Keywords: video stabilization; real-time; rigid transformation; shakiness detection
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非均质NURBS体参数化模型切片算法
陈龙,阮辰,韩文瑜
(上海理工大学机械工程学院,上海 200093)
摘要:非均质NURBS体参数化模型能连续表达整个实体内部的材料信息而受到重视,但直接对该模型进行切片用于快速成型目前并没有相关研究。提出一种非均质NURBS体参数化模型切片算法。通过在控制点上附加材料组分信息且通过不同基色表示不同的材料成分。通过等参数线划分网格,并找出与切片平面相交的网格单元,然后求出切片平面对各网格单元的截面,得到带有材料分布信息的切片截面。切片结果表明,非均质NURBS体参数化模型切片算法能有效的获得非均质实体模型的包含材料组分信息的截面信息,为基于NURBS体模型的非均质产品的快速成型提供技术支撑。
关键词:非均质产品;快速成型;NURBS体;切片算法
中图分类号:TH164/TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2431-08
Slicing Algorithm for Heterogeneous NURBS Volume Parameterization Model
Chen Long, Ruan Chen, Han Wenyu
(College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)
Abstract: Heterogeneous NURBS Volume Parametric Model is attached importance for its ability to express the Information of materials continuously. But there is scarce study on the slicing algorithm of heterogeneous NURBS volume parametric model for rapid prototyping yet. A slicing algorithm for heterogeneous NURBS volume parametric model was proposed. The materials were expressed by putting the material information on control points and display different color to represent different materials. The model was divided into patches by iso-line. Find out the patches which intersect with the given cutting plane, then get the sections of the meshes containing material information. The results show that slicing algorithm for heterogeneous NURBS volume parametric model can get the section with material information effectively, and provide technical support for rapid prototyping of parametric products.
Keywords: heterogeneous products; rapid prototyping; NURBS volume; slicing algorithm
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基于案例推理及距离场的家居在线布局方法
宋佩华,贾金原
(同济大学软件学院,上海 201804)
摘要:针对家居在线自动布局的实时响应等需求,提出了基于案例推理及距离场的布局方法。归纳出耦合型、矩阵型和围合型三种局部布局模式。通过构建数学模型,将其与案例推理技术结合求解耦合型布局模式;给出了矩阵型布局模式求解算法;应用距离场拟合出室内地面能量分布函数,结合拟人摆放规则对围合型布局模式进行求解。然后,将场景布局问题分解成若干个局部布局模式,对其进行求解、组合,得到该场景的布局。通过实验验证,该方法布局结果与真实案例相近、鲁棒性强、运行时间可满足在线布局的实时响应需求。
关键词:家居布局;布局模式;案例推理;距离场
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2438-10
Online Furniture Layout Method Based on Case-based Reasoning and Distance Fields
Song Peihua, Jia Jinyuan
(School of Software Engineering, Tongji University, Shanghai 201804, China)
Abstract: A furniture layout method based on case-based reasoning and distance fields was proposed to meet online real-time response requirements. Three partial layout modes were summarized. Coupling layout mode was solved using case-based reasoning combined and mathematical model; matrix layout mode and furniture spacing algorithm were proposed; enclosed layout mode was solved using a personification rules and energy distribution function based on distance fields. Scene layout was divided into several partial layout modes, which were solved and synthetized. Experimental results show that effect of the method is similar to the real design case, and the method is robust, and the method computation time can meet the real-time response requirements of the online furniture layout.
Keywords: furniture layout; layout mode; Case-based Reasoning; distance fields
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一种基于心理学模型的人群踩踏情景仿真方法
刘婷婷,刘箴,柴艳杰,刘翠娟,陈佳鑫
宁波大学信息科学与工程学院宁波 315211
摘要:随着中国城镇化进程的推进,举办大型文化活动的数量迅速增加,规模日益增大。此类人员密集场所会大大增加人群拥挤踩踏的风险。但是,目前关于人群踩踏的仿真研究比较少见。为了推演人群的踩踏情景,提出了一种基于心理学原理的人群踩踏仿真模型。该模型考虑了密集踩踏人群中的情绪感染因素,能够模拟人群的踩踏过程,给出了人群踩踏的判决条件。仿真实验以在公园游览的人群为研究对象,对人群的踩踏现象进行了三维情景仿真演示。研究成果有助于管理部门分析如何对密集人群进行管理和部署,为进一步深入研究人群踩踏预案提供了一种新视角
关键词:跟随;人群仿真;个性;社会力
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2448-07
Method for Crowd Trampling and Crushing Simulation Based on Psychological Model
Liu Tingting, Liu Zhen, Chai Yanjie, Liu Cuijuan, Chen Jiaxin
(Faculty of Electrical Engineering and Computer Science of Ningbo University, Ningbo 315211, China)
Abstract:With the accelerated development of urbanization, the number and the scale of cultural events have increased rapidly. In such crowded places, the risk of crowd trampling and crushing will be greatly increased. However, the current studies on crowd trampling and crushing simulation are relatively rare. In order to deduce the crowd trampling and crushing scene, a crowd trampling and crushing simulation model based on the psychological principles was proposed. The model considered emotional factors for the trampling and crushing in the dense crowd; simulated crowd trampling and crushing process and introduced the judgment criterions for the crowd trampling and crushing. The simulation experiment was about crows in the park. The three-dimensional scene simulation was realized for the phenomena of trampling. The result of this research helps relative departments to analyze and deploy the dense crowd. It also provides a new perspective for the further studies about the crowd trampling and crushing contingency plan.
Keywords: crowd; trampling and crushing; emotional contagion; virtual simulation
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基于随机可逆矩阵的3D点云模型加密
吴肇星,金鑫,宋承根,张春伟,李晓东
(北京电子科技学院,北京 100070)
摘要:针对3D模型中存在的隐私保护问题,提出一种基于混沌映射的3D点云模型加密方案。利用混沌映射生成一个3×3随机可逆矩阵和一个3×1平移向量,利用以上的随机可逆矩阵和平移向量可以将点云中的每一个点变换到一个齐次坐标。用以上加密方案对不同的3D点云模型进行大量测试的结果显示,每个点云模型都能正确地加解密。通过运用视点特征直方图对加密的结果进行评估,结果表明:该方案能够生成难以辨认的密文3D点云。
关键词:3D点云;加密;混沌映射;点特征直方图;视点特征直方图
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2455-05
Random Reversible Matrix based Point Cloud Encryption
Wu Zhaoxing, Jin Xin, Song Chenggen, Zhang Chunwei, Li Xiaodong
(Beijing Electronic Science and Technology Institute, Beijing 100070, China)
Abstract: Paying less attention to the privacy protection in the 3D model, an encryption scheme based on chaotic map of 3D point cloud model was proposed, which realized the encryption of 3D point cloud, that used chaotic maps to generate a 3×3 random reversible matrix and a 3×1 translation vector, used the above random reversible matrix and the translation vector can transform each point of the point cloud to a homogeneous coordinate. After a lot of tests on different 3D point cloud models were carried out, the test results show that each point cloud model can be correctly encrypted and encrypted. In addition, the results of encryption was evaluated by the view feature histogram (VFH). Evaluation results show talmost no recognition of the encrypted 3D point cloud.
Keywords: 3D point clouds; encryption; chaotic mapping; point feature histogram; view feature histogram
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矢量与栅格结合的分块平面区域几何划分算法
陈国军,刘婧怡,黄莹莹
(中国石油大学(华东) 计算机与通信工程学院,青岛 266580)
摘要:利用矢量法保持数据精度以及栅格法缩小搜索范围,建立矢量与栅格结合的平面区域几何划分算法。针对栅格填充死区多边形和带连续多岛屿多边形进行特殊处理,自适应区分和处理普通多边形与带岛屿多边形,同时能自适应处理局部单个多边形构建与全局平面区域几何划分。为提高算法时间效率,平面区域几何划分采用分块处理。先将子块几何划分,再进行多边形无缝拼接,利用分割时建立的关系表对多边形进行配对和拼接。实验表明,新算法能正确生成具有死区特征的多边形和多边形间的嵌套关系;分块拼接算法为块间并行处理提供支撑。
关键词:多边形构建;平面区域几何划分;无缝拼接;拓扑
中图分类号:TP242.3????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2460-07
Block Algorithm for Geometric Division of Planar Region Based on Vector and Raster Interblended
Chen Guojun, Liu Jingyi, Huang Yingying
(College of Computer and Communication Engineering, China University of Petroleum, Qingdao 266580, China)
Abstract: Using the vector method to maintain the accuracy of the data and the raster method to decrease the search scope, an algorithm was proposed for geometrics division of planar region based on vector and raster interblended. Special treatments for the raster filling polygon of "dead-zone" and the continuous multi-island polygon to adaptively dealt with the common polygon and the polygon with island, as well as the local individual polygons constructing and the global geometric division of planar region. In order to improve the time efficiency, geometric division of planar region used the block division process. Geometric division for sub-block was done, and polygon seamless contiguity was done by the partition table that set up in segmentation. Experiments show that the new algorithm can correctly generate the nested relationship between polygons and polygons with “dead-zone”, and the polygon seamless contiguity algorithm provides support for parallel processing between blocks.
Keywords: polygon construction; geometric division of planar region; seamless contiguity; topology
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一种基于DirectCompute加速的实时流体仿真框架
刘璐1,刘箴1,何高奇2,陈田3,刘婷婷1,刘翠娟1
(1. 宁波大学信息科学与工程学院 宁波 315211;2. 华东理工大学计算机科学与工程系 上海 200237;3. 上海电机学院 上海 200000)
摘要:针对流体仿真中流体粒子规模增大导致的仿真效率较低和较复杂固液边界处理耗时较长的问题,提出了一种基于DirectCompute加速的实时流体仿真框架,仿真中采用一种基于网格的局部碰撞检测方法来加快搜索固液边界,使用DirectCompute技术将流体计算、碰撞检测和流体表面重构部分放入GPU(Graphics Processing Unit)中并行计算来加速SPH(Smoothed Particle Hydrodynamics)流体仿真,并利用特性优化了SPH流体仿真的存储结构,节省了存储空间。实验结果证明,该框架有效提高了带有较复杂静态场景的流体仿真速度,并能展现出流体水花细节。
关键词:流体仿真;光滑流体动力学方法;碰撞检测;GPU加速
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2467-09
Real Time Fluid Simulation Framework Based on DirectCompute
Liu Lu1, Liu Zhen1, He Gaoqi2, Chen Tian3, Liu Tingting1, Liu Cuijuan1
Abstract: A real time fluid simulation framework based on DirectCompute acceleration was proposed to solve problems of low simulation efficiency that caused by the increasing fluid particle size and long processing time that caused by the complex solid-liquid boundary. In the simulation, a grid local collision detection method was adopted to speed up the search for the solid-liquid boundary. Fluid calculation, collision detection and surface reconstruction were computed parallel in the GPU with DirectCompute technology to accelerate the SPH fluid simulation. It could optimize the storage structure of fluid simulation, and save the storage space. Experimentalresults show that the framework can effectively improve the fluid simulation speed with more complex static scene, and can show the details of the fluid spray.
Keywords: fluid simulation; smoothed particle hydrodynamics; collision detection; GPU acceleration
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基于模块划分的GPU加速布料动画
周昆1,刘箴1,何高奇2,陈田3,刘婷婷1,刘翠娟1
(1. 宁波大学信息科学与工程学院 宁波315211;2. 华东理工大学计算机科学与工程系 上海 200237;3. 上海电机学院 上海 200000)
摘要:为了提高布料动画的仿真速度,通过研究动力学和基于位置约束动力学(PBD)的两种布料仿真模型,提出了划分模块的并行计算方法。首先利用数据分块的方式将单个计算任务划分为独立的块;然后对块内采用GPU并行计算,进而提高了布料动画仿真的实时性和鲁棒性;最后,观察布料在不同的场景环境和随机风场作用下的仿真动画,验证了该算法的适用性和有效性。实验结果表明,在相同的条件下,文中计算方法能够有效提高仿真速度,同时在仿真精度较高时,依然可以满足实时性的仿真动画要求。
关键词:动力学仿真;布料动画;GPU并行计算;风场;模块划分
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2476-09
GPU-accelerated Cloth Animation Based on Module Division
Zhou Kun1, Liu Zhen1, He Gaoqi 2, Chen Tian3, Liu Tingting1, Liu Cuijuan1
(1. Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China; 2. Department of computer science and engineering, East China University of Science and Technology, Shanghai 200237, China; 3. Shanghai Dianji University, Shanghai 200000, China)
Abstract: In order to improve the simulation speed of cloth animation, a module division parallel computing method was proposed by studying two kinds of cloth simulation models with dynamics and position based dynamics (PBD). A computing task was divided into a plurality of independent blocks by the way of data block. GPU parallel computing was used within the data block to improve the real-time performance and robustness of the cloth simulation. The applicability and effectiveness of the algorithm were verified under different scenarios and stochastic wind field. Experimental results show that under the same conditions, the proposed method can effectively improve the simulation speed. Moreover, it can meet real-time requirements at higher simulation accuracy.
Keywords: dynamic simulation; cloth animation; GPU parallel computer; wind field; module division
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代数曲线间最短距离的细分算法
祁佳玳,寿华好
(浙江工业大学理学院,杭州 310023)
摘要:当代数曲线表达式较为复杂时,用传统方法求解两条代数曲线间的最短距离具有一定的难度,因此提出一种细分算法。该方法应用四叉树数据结构将两条代数曲线细分离散,得到分别包含这两条代数曲线的两组像素集,应用区间算术计算这两组像素集之间的最短距离区间,该区间的中点能够用来近似表示代数曲线间的最短距离,则误差可以控制在该区间长度的一半以内。对比其他方法,不管代数曲线表达式如何地复杂,该方法始终有效,而且在任意精度下,都可以计算出代数曲线间最短距离的近似值。还可以计算出该近似值的最大误差限
关键词:代数曲线;最短距离;区间算术;细分算法
中图分类号:TP391.7????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2485-06
Subdivision Algorithm for Computing the Minimum Distance Between Two Algebraic Curves
Qi Jiadai, Shou Huahao
(College of Science, Zhejiang University of Technology, Hangzhou 310023, China)
Abstract: Since it is difficult to compute the minimum distance between two algebraic curves by traditional methods when the expressions of the algebraic curves are complicated, a subdivision algorithm is proposed. Quadtree data structure was used to subdivide the two algebraic curves into two sets of pixels. Interval arithmetic was used to compute the minimum distance interval between these two sets of pixels. The center of this interval is the approximation of the minimum distance between the two algebraic curves. The error is less than a half of this interval. Compared with traditional methods, this method can obtain the approximation of the minimum distance between two algebraic curves at any precision, as well as the error estimation at the same time.
Keywords: algebraic curve; minimum distance; interval arithmetic; subdivision algorithm
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面向可交互式智慧鱼群的权重动态约束的粒子群方法
蔡兴泉1,布尼泓灏1,李梦璇1,李凤霞2
(1. 北方工业大学计算机学院,北京 100144;2. 北京理工大学智能信息技术北京市重点实验室,北京 100081)
摘要:针对粒子群算法在短程迭代的状况下搜索精度差、波动大、粒子状态考证不足的问题,提出了一种面向可交互式智慧鱼群的权重动态约束的粒子群算法。根据粒子状态将粒子群进行分离,对粒子群进行动态约束管理,并使用系数收敛管理器的概念保留了粒子间的差异化运动。设定估价函数,采用权重动态约束,完成粒子群的快速求解,并使之应用于智慧鱼群模拟。结果表明,在大规模虚拟生物集群移动中,权重动态约束效果最好;完成智慧鱼群运动时,明显优于普通粒子群算法,且速度明显加快。该方法已经很好的用在了自主开发的虚拟水族馆系统中,运行稳定可靠。
关键词:智慧鱼群;权重动态约束;粒子群;估价函数
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2490-07
Particle Swarm Optimization Method Based on Weighted Dynamic Constraints for Interactive Intelligent Fish Swarm
Cai Xingquan1, Buni Honghao1, Li Mengxuan1, Li Fengxia2
(1. School of Computer Science, North China University of Technology, Beijing 100144, China; 2. Beijing Laboratory of Intelligent Information Technology, Beijing Institute of Technology, Beijing 100081, China)
Abstract: For particle swarm algorithm not being applied to the rapid evolution of virtual biological cluster in short range, a particle swarm optimization method was provided that oriented to interactive intelligent fish with weight dynamic constrained. This method let particle swarm through the state of the particle separation, and dynamic constraint particle swarm. This method used the concept of "convergence coefficient manager" to retain the differential movement between the particles. On this basis, setting the evaluation function and using the dynamic constraint weights, the fast particle swarm was completed, applying to virtual biological cluster. The experiments results show the best weights dynamic constraint effect in large-scale virtual biological cluster and intelligent fish pattern movement, and this method is more effect than common particle swarm optimization algorithm, and accelerates significantly. And this method has been used in the development of virtual aquarium system with stable and reliable.
Keywords: artificial intelligence fish; dynamic constraint weights; particle swarm; evaluation function
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基于函数偏广义逆连分式插值的有理插值蒙皮曲面设计
赵欢喜
(中南大学信息科学与工程学院,湖南 长沙 410083)
摘要:提出了一种二元函数偏广义逆,利用提出的偏广义逆定义了二元函数的偏倒差商,利用这种偏倒差商给出了基于Thiele型连分式插值算法的有理插值蒙皮曲面以及一种具有承接性的有理插值蒙皮曲面递推算法。利用融合技术以及低次的切触基于函数广义逆连分插值,构造了有理插值蒙皮样条曲面,给出了参数形式的有理插值蒙皮曲面,数值仿真例子说明了本文提出的蒙皮曲面造型的有效性。
关键词:函数广义逆;偏倒差商;连分式;有理超限插值;蒙皮曲面
中图分类号:TP391.41????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2497-06
Rational interpolation skinning surface via continued fractions interpolation based on partial generalized function inverse
Zhao Huanxi
(School of Information Science and Engineering, Central South University, Changsha 410083, China)
Abstract: A two-variable functions partial generalized inverse was proposed, and using the proposed partial generalized inverse, the partial inverse difference of two-variable?functions was defined, and then based on the partial inverse difference. Thiele continued fraction interpolation algorithm for rational interpolation skinning surface and parameters rational interpolation spline skinning surface were proposed respectively. Interpolation recursion formula for the rational interpolation skinning surface was presented, and numerical simulation example illustrates the effectiveness of skinning surface modeling algorithm.
Keywords: function generalized inverse; partial inverse difference; continued fractions; rational transfinite interpolation; skinning surface
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适用于密集人群目标检测的多尺度检测方法
周建新1,吴建军2,薛均强2,林帅1,党岗1,程志全3*
(1.国防科学技术大学 计算机学院,湖南长沙 410073;2.中国人民解放军海南武警总队,海南海口 570203;TuEag8879环亚手机|首页主页
3.湖南化身科技有限公司,湖南长沙 410205)
摘要:针对密集人群场景下的目标检测问题,提出了一种多尺度的目标检测方法。在粗尺度下,使用优化的DPM(Deformable Part Model)检测方法,将人体全身作为检测对象,检测整个场景中的稀疏目标;在细尺度下,将头部作为检测对象,使用重新训练的Faster R-CNN(Region-based Convolutional Neural Network)网络检测稠密人群中的目标将两种尺度下检测结果通过非极大值抑制(NMSNon-Maximum Suppression)方法结合在一起,这样两种方法既互相补充又能去除冗余检测结果。实验结果证明,相比于单独的DPM检测方法和Faster R-CNN检测方法,提出的多尺度检测方法在检测精度上有显着提升。
关键词:密集人群检测;多尺度检测;DPM;Faster R-CNN
中图分类号:TP18????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2503-07
Multi-scale Detection Method for Dense Crowd Target Detection
Zhou Jianxin1, Wu Jianjun2, Xue Junqiang2, Lin Shuai1, Dang Gang1, Cheng Zhiquan3*
(1.????? National University of Defense Technology, Changsha 410073, China;?2. Hainan Armed Police Force, Hainan 570203, China; 3. Hunan Avatar Science Company, Changsha 410205, China)
Abstract: A multi-scale algorithm was proposed to detect the targets flexibly. Deformable Part Model) method was used to filter out sparse objectives that was represented by whole body. Then the whole scenario was cut into multiple finer regions and the Faster R-CNN (Region-based Convolutional Neural Network) method was trained and utilized to detect dense objects that was indicated by head in fine scale. These two detection results were incorporated via NMS (Non - Maximum Suppression) method, in order to supplement with each other and remove redundancy. The effectiveness of the proposed method has been proved comparing detect accuracy with DPM and R-CNN individually in the final experiment.In coarse scale, an optimized DPM (
Keywords: dense crowd target detection; multi-scale detection; DPM; Faster R-CNN
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一种针对农残检测数据的时序分组可视化方法
陈红倩1,方艺1,杨倩玉1,李慧2,陈谊1
(1. 北京工商大学计算机与信息工程学院食品安全大数据技术北京市重点实验室,北京 100048;TuEag8879环亚手机|首页主页
2. 北京联合大学管理学院,北京 100101)
摘要:针对农残检测数据多统计量的对比展示及安全风险评估需求,提出一种针对农残数据的时序分组可视化方法。基于数据表征意义对数据进行结构分层分组,采用随时间变化的多类堆叠统计图将多维数据对象分组布局在二维平面空间中。借鉴散点图和气泡图可视化农产品分类属性;借鉴堆积条形图可视化时序采样属性组数据;借鉴堆叠玫瑰图实现对农药检测结果属性组的多属性对比及时间变化。实验结果与食品安全领域专家评价结果显示,所提出的方法能够在可视化结果中一次性表现多种统计量数据,并能实现时间维度上的数据对比。
关键词:数据可视化;农残检测数据;时序数据;数据对比
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2510-10
Temporal Group Visualization Method for Pesticide Residue Detection Data
Chen Hongqian1, Fang Yi1, Yang Qianyu1, Li Hui2, Chen Yi1
(1. Beijing Key Laboratory of Big Data Technology for Food Safety, School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China; 2. College of Management, Beijing Union University, Beijing 100101, China)
Abstract: To show and compare more statistics in pesticide residue detection data, a temporal grouping visualization method was proposed. The method divided data set according to the hierarchy of data meaning. The stacked statistical likely figure was designed to watch data and its trending over time. The multidimensional data objects were grouped in the two-dimensional plane space layout. The scattered bubble charts was introduced to express the classification of agricultural products. Stacked bar graph was adopted to show the sequential sampled attribute data. Multi-fold rose diagram was designed to display comparably the pesticide detection result and its temporal attribute. Experimental results and expert evaluations denote that the proposed method can realize data classification and comparison of multiple attribute display and time change. Data contrast and the trend over time can be realized in addition.
Keywords: data visualization; pesticide residues data; temporal data; data comparison
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基于二次反射映射的动态水面模拟
李华1,2,杨华民1,2*,冯欣1,2
(1.长春理工大学计算机科学技术学院,吉林 长春 130022:2.特种电影技术及装备国家地方联合工程研究中心,吉林 长春 130000)
摘要:为提高动态水面的模拟效果,提出利用3D网格建模,通过投影网格技术进行优化,生成水面以上物体的镜面映像,构成一级反射映射图;简化纳维-斯托克斯方程,将生成的高度值与映像后的纹理叠加,根据透视纹理映射坐标计算表面反射与折射,构成二级反射图;最后,将二级反射图进行透视纹理映射渲染到水面,实现水面反射和折射的快速模拟。测试实验表明,算法能快速、高真实感的模拟动态水面,适合对近距离物体的水面精确观察,渲染帧率可达到30FPS以上。
关键词:Navier-Stokes;水面模拟;反射;折射;反射映射
中图分类号:TP391.1????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2519-08
Dynamic Water Surface Simulation Based on Secondary Reflection Mapping
Li Hua1,2, Yang Huamin1,2*, Feng Xin1,2
(1. School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China; 2. National Local Combined Engineering Research Center of Special Film Technology and Equipment, Changchun 130000, China)
Abstract: In order to improve the effects of dynamic water surface simulation, a method was proposed which utilized 3D mesh modeling water surface and was optimized by projective grid method; A mirror image of the subject above the water was generated which was called the first reflection map; then the simplified Navier-Stokes equation was enforced onto the first texture mapping. The reflection and refraction was calculated to form a secondary reflection map with respect to the perspective mapping coordiante; Perspective texture mapping was enforced to water surface to achieve fast simulated water surface. Experimental test shows that the approach can simulate the dynamic water surface fastly with high quality. This method is suitable for precise observation of water surface and more than 30FPS frame rate can be achieved.
Keywords: Navier-Stokes; water surface simulation; reflection; refraction; reflection mapping
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欠驱动仿人多指手的虚拟样机建模和运动仿真
张耀鹏,王党校,王丽君,钱锡康
(北京航空航天大学,北京100191)
摘要:随着上肢残疾人数的增加,对仿人型机器手的需求越来越多。基于钢丝绳传动欠驱动多指仿人手,结构简单紧凑,重量轻,抓取稳定,灵活,可以根据目标物体形状自适应的抓取物体。食指和拇指对捏、侧捏是人手日常生活中的经常操作,仿人手能否实现对捏、侧捏很大程度上决定仿人手设计是否成功。在仿人手虚拟样机设计阶段,利用MATLAB建模计算,用ADAMS运动仿真,两者相互结合,可以直观地验证仿人手食指、拇指主要设计参数是否合适,功能上能否实现对捏、侧捏,为之后的详细设计奠定基础。
关键词:欠驱动;MATLAB;ADAMS;对捏;侧捏;虚拟样机仿真
中图分类号:TH122????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2527-07
Virtual Modeling and Motion Simulation of Under-actuated Humanoid Multi-fingered Hand
Zhang Yaopeng, Wang Dangxiao, Wang Lijun, Qian Xikang
(Beihang University, Beijing 100191, China)
Abstract: With the increase of the number of upper limb disabilities, requirement of humanoid artificial hand is more and more. Under-actuated multi-fingered prosthetic hand based rope driving has simple and compact structure, light weight and it can shape-adaptively grip objects stably and flexibly according to the target object shape. The index finger and thumb for pinch and lateral pinch are very often operated in everyday life. So pinch and lateral pinch largely determine the success of prosthetic hand design. In the guise of the preliminary design stage, combination of the use of MATLAB modeling calculations, and ADAMS movement simulation can visually verify if the main design parameters of prosthetic hand index finger and thumb are appropriate, functionally achieve the pinch and lateral pinch, so as to lay the foundation for the detailed design.
Keywords: under-actuation; MATLAB; ADAMS; pinch; lateral pinch; virtual simulation
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基于虚拟场景距离测度的复合卡尔曼运动估计
孙智仲,卢泽辉,李蔚清
(南京理工大学 计算机科学与工程学院,江苏 南京 210094)
摘要:MEMS惯性传感器应用于人体动作捕捉,但由于传感器的系统误差,导致虚拟人不能精确、稳定的操作。为了实现对手臂运动的精确跟踪,通过对虚拟手臂运动规律的分析,基于虚拟场景中虚拟手臂的手指到物体中心之间的距离测度,结合虚拟手臂运动特点,设计了一种手臂运动的复合卡尔曼运动模型。该模型将手臂运动分为匀速模型、匀加速模型等几个典型阶段,根据距离测度的不同,用不同的模型去对虚拟手臂的运动做精确估计。通过实验验证,复合卡尔曼模型可以实现在虚拟场景中的虚拟手臂精确地运动估计。
关键词:复合模型;卡尔曼运动估计;虚拟场景;距离测度
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2534-06
Composite Kalman Motion Estimation Method Based on Virtual Distance
Sun Zhizhong, Lu Zehui, Li Weiqing
(School of Computer Science & Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)
Abstract: MEMS inertial sensors applied to human motion capture, but because of the MEMS sensor system errors, the virtual people cannot operate precisely and stably. In order to achieve tracking the movement of an arm accurately, by analyzing the movement of a virtual arm, measuring the distance between the finger of the arm and the center of the object in virtual scene, combined with the virtual arm movement characteristics, a composite Kalman motion estimation method was designed. The model divided arm movement into a uniform model, a uniformly accelerated model and several typical phase models. Depending on the different distance measure, used the different models to make an accurate estimate of the movement of a virtual arm. Through experiments, the composite Kalman motion estimation method could estimate virtual arms in a virtual scene accurately.
Keywords: composite model; kalman motion estimation; virtual scene; distance measure
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多基地多无人机协同侦察规划模型和模型求解方法
李原1,张会1,吴思瑾2
(1. 海军潜艇学院,青岛 266071;2. 西北农林科技大学信息工程学院,西安 712100)
摘要:建立多目标、多基地、多无人机、目标有侦察时间窗口和侦察器材限制的无人机协同侦察规划模型,并给出模型求解方法。对无人机起飞基地、所携带的侦察器材类型以及所侦察的目标序列同时进行优化,寻找所需无人机数量最少的协同侦察方案。将单个方案的生成过程分为两步,分别为初步方案生成和详细方案生成;按照主次关键字对方案进行排序;给出基于遗传算法的协同侦察方案优化方法。计算实验表明,可以得到高品质的协同侦察方案。
关键词:多基地;多无人机;协同侦察;时间窗口;遗传算法
中图分类号:TP391.9????? 文献标识码:A?? ????文章编号:1004-731X (2016) 10-2540-06
Planning Model and Model Solve Method of Multi-base Multi –UAV Cooperative Reconnaiance
Li Yuan1, Zhang Hui1, Wu Sijin2
(1. Navy Submarine Academy, Qingdao 266071; 2. College of Information Engineering, Northwest A&F University, Xi’an, 712100)
Abstract:A UAV cooperative reconnaiance planning model with multi-base, multi-UAV, restrictions of target reconnaiance thime windows and target reconnaiance equipment was set up, and the model solve method was proposed. The take-off bases of the UAvs, the type of reconnaiance equipment carried and the target sequences reconnaianced by the UAVs were optimized in company in order to find the reconnaiance plan that need minimum number of UAVs. The process of signal plan forming was devided into two steps, the formation of the initial plan and the formation of the specific plan. The plans were ranked by the primary and secondary key words. The optimazation method based GA was proposed. According to the computationl experiments, high-quality reconnaiance plan can be worked out.
Keywords: multi-base; multi-UAV; coopertive reconnaiance; time windows; Genetic Algorithm
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一种基于网格模型简化的热核特征提取算法
李海生1,2,孙莉1,2,蔡强1,2,曹健1,2
(1.北京工商大学计算机与信息工程学院,北京 100048;2. 食品安全大数据技术北京市重点实验室,北京 100048)
摘要:热核特征提取算法是近几年出现的一种三维模型特征提取算法。针对热核特征计算效率低,对顶点数目过多的三维模型处理时间过久甚至是无法处理的问题,采用基于二次误差测度网格模型简化算法对三维模型进行预处理,并对简化后的模型提取其热核特征。实验表明经过简化后的模型处理效率高,比直接对原始模型提取热核特征耗时减少,原始模型顶点数越多效率提升越明显。简化后模型的热核特征与原始模型结果基本一致,满足模型匹配的要求。
关键词:非刚性三维模型;网格模型简化;热核特征;特征提取
中图分类号:TP391.4????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2546-08
Heat Kernel Signature Extraction Algorithm Based on Mesh Simplification
Li Haisheng1,2, Sun Li1,2, Cai Qiang1,2, Cao Jian1,2
(1. School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China; 2. Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing 100048, China)
Abstract: Heat kernel signature has been proposed for 3D model feature extraction in recent years. However, the performance of heat kernel signature is inefficient, especially when the models have large number of vertices. Mesh simplification algorithm based on quadric error metrics was used to preprocess 3D model and the heat kernel signature was calculated based on the simplified model. Experiments show that the feature extracting time of the simplified model is less than the original model. The more vertices of the original model, the more obvious of the improved efficiency. The heat kernel signature of simplified model is consistent with the original model, which can satisfy the requirement of 3D model retrieval.
Keywords: non-rigid 3D model; mesh simplification; heat kernel signature; feature extraction
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个体相关的人体质量参数求解
吕晓磊1,2,夏时洪1
(1. 中国科学院计算技术研究所,北京 100190;2. 中国科学院大学,北京 100049)
摘要:在传统的基于物理的角色动画中,人体模型一般使用简单的多刚体模型进行近似。但是人体具有非常灵活的关节和几何变化,因此在传统的基于物理的角色动画中,使用简单多刚体模型估计的人体质量参数不够准确。针对这个问题,提出一种基于测力台数据和运动捕获数据的人体质量参数优化方法。该方法根据地面接触力信息和采集获得的运动信息,通过拉格朗日方程的约束,迭代优化获得人体质量参数。采集获得了多个角色的多种不同类型的运动。实验结果表明:该方法计算获得的人体质量参数信息与已有生物力学文献结果一致,而且能够有效的减少运动过程中存在的噪声(拉格朗日误差)信息。
关键词:质量参数;动力学数据;生物力学真实;迭代优化;角色动画
中图分类号:TN911.2????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2553-07
Subject-specific Body Segment Parameter Optimization
Lv Xiaolei1,2, Xia Shihong1
(1. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: In conventional methods of physics based character animation, human model are approximated by the rigid body models. However, the human body parts are not as easily described as rigid bodies with defined joints and inflexible geometry, daily varying mass, etc. A body segment parameter optimization method based on the force plate data and motion capture data was proposed. This method optimized the body segment parameter iteratively using the Lagrange constraints based on the contact information and motion capture data. Different subjects took part in the motion capture process with various kinds of motions. A comprehensive evaluation was done for the optimization of body segment parameter. The results show that the optimized body segment parameter is consistent with the biomechanics literature and the result can decrease the noise information in the motions.
Keywords: body segment parameter; dynamic data; biomechanics valid; iterative optimization; character animation
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大数据环境下历史人物知识图谱构建与实现
周亦1,2,周明全1,2,王学松1,2,黄友良1,2
(1.北京师范大学信息科学与技术学院,北京 100875;2.教育部虚拟现实应用工程中心,北京 100875)
摘要:大数据时代下,知识图谱和数据可视化技术能够将数据以结构化、可视化的方式呈现,建立以关键词为中心的知识体系,展示数据间相互关系。在此基础上,设计并实现历史人物实体关系可视化系统。系统基于Nodejs平台,采用B/S架构,将繁杂数据分为人物数据和事件数据,分别采用基于标签遍历和基于链接权重的方法进行数据解析存储至历史人物库。系统提供多种交互方式并具有良好的扩展性和维护性,以丰富直观地形式将历史人物和事件的信息可视化,帮助人们更好理解、梳理及挖掘历史人物及相关事件关系,对相关研究人员有一定的帮助和参考价值。
关键词:知识图谱;实体关系;数据解析;数据可视化
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2560-07
Design and Implementation of Historical Figures Knowledge Graph Visualization System
Zhou Yi1,2, Zhou Mingquan1,2, Wang Xuesong1,2, Huang Youliang1,2
(1. Department of Information Technology, Beijing Normal University, Beijing 100875, China;TuEag8879环亚手机|首页主页
2. Engineering Research Center for Virtual Reality Applications, MOE, Beijing 100875, China)
Abstract: With the advent of big data era, knowledge graph and data visualization technology present the data in a structured, visual way and establish a keyword-oriented knowledge system and render the relationship in a fast and clearly way. In this paper, a historical figures entity relationship visualization system has been established by means of data visualization and knowledge graph. In the system,the complex data are divided into character data and event data by data preprocessing. In the parsing stage, a label traversing method and a method based on weight of links are applied to the divided data respectively. With the layered B/S structure design, the system is based on the Nodejs platform in which a historical figures database is founded. The users can obtain the knowledge graphs of relevant historical figures and events according to distinct needs. This system provides a variety of interactive with good scalability and maintainability and makes contributions to comprehension and exploration of the data and relationship quickly by presenting the data in visual forms. To some extent, it owes reference value to research staff as well.
Keywords: knowledge graph; entity relationship; data parse; data visualization
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海啸可视化仿真及灾害风险评估
解翠,寻锦锦,周小伟,董军宇
(中国海洋大学计算机科学与技术系,山东 青岛 266100)
摘要:通过对中国南海潜在海啸事件进行有效地建模和可视化仿真,模拟多种海啸发生、传播、淹没过程,并统计海啸淹没的概率、程度和范围等信息。利用GIS分析和图像处理技术对研究区域的建筑物/重要设施的位置和功能类型等信息进行提取和分类,再进行有效的人口分布建模和人员响应能力的易损性估计,结合地理环境信息和历史灾害记录,采用改进的风险评估方法,不仅考虑遭受海啸袭击概率,还考虑了淹没速度、深度及人口密度和疏散时间等因素,基于决策树分类判别方法生成海啸风险图,帮助找出易受灾的危险区进行早期预警,辅助灾害管理和防灾减灾预案的制定。
关键词:海啸;可视化仿真;风险评估;人口分布建模
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2567-07
Visual Tsunami Simulation and Disaster Risk Assessment
Xie Cui, Xun Jinjin, Zhou Xiaowei, Dong Junyu
(Computer Science and Technology Department of Ocean University of China, Qingdao 266100, China)
Abstract: Based on the effectively modeling and visual simulation of the potential tsunami event in the South China Sea, the tsunami generation, propagation, runup and inundation could be visually simulated with multiple scenarios. The inundation probability, the flood inundation area and degree were computed. The location and function of buildings/critical facilities in the study area were extracted and classified by GIS analysis and image processing technology. Then the population distribution was effectively modeled and the vulnerability of people response was estimated for risk assessment combining with the geographical information and the historical disasters record. This improved method considered the inundation probability of tsunami, the flood speed, depth, and other factors such as population density and available evacuation time, etc. The tsunami risk map was generated based on the decision tree classification method, which helps find the high risk areas for early warning and assists in disaster management and disaster prevention and mitigation.
Keywords: tsunami; visual simulation; risk assessment; population distribution modeling
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基于虚拟仿真的室内照明评价体系研究与设计
蒋琤琤,张显斗
(杭州电子科技大学数字媒体与艺术设计学院,浙江 杭州 310018)
摘要:随着人类生活文化程度的提高,一些曾经被忽略的影响我们生活质量与身体健康的污染源也逐渐被重视,光污染即其中之一。一些国际组织已经提出了光污染防治技术规定和技术指南,但还没有统一的光污染设计技术标准,照明环境特别是室内照明环境的舒适度难以量化,从而使照明环境设计没有依据。室内照明评价体系研究与设计旨在建立一个室内环境设计的评估标准以及评价模型,从而开发一套室内光环境评估体系(EvaLighting0.1),利用感性工学将用户舒适度等用户体验与照明参数结合起来,帮助设计师完善室内照明环境的设计与评估。
关键词:光污染;室内光环境;统一眩光值;评价标准模型
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2573-05
Research and Design for Indoor Illumination Environment Evaluation System based on Virtual Reality
Jiang Chengcheng, Zhang Xiandou
(School of Digital Media and Art Design in Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: With the improvement of human life, some kinds of pollution which was neglected have been taken seriously, the light pollution is one of them. Some international organizations have been proposed light pollution prevention technical regulations and guidelines, these kinds of documents only limit the parameters like brightness on the point of lighting design, but not make any worldwide standards system to evaluate and prevent illumination pollution. Therefore, the quality of illumination environment especially indoor illumination environment is difficult to quantify. Indoor illumination environment evaluation system (EvaLighting0.1) aims to build a standard model for indoor illumination environment. In this model, it connects the human experience with illumination parameters. This system EvaLighting0.1 is used to evaluate and improve the quantity of indoor illumination environment.
Keywords: lighting pollution; indoor illumination environment; unified glare rating (UGR); standard evaluation model
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虚拟人语音交互对焦虑情绪舒缓效果研究
杨奕1,翁冬冬1,薛松1,苏妺2
(1. 北京理工大学光电学院,北京 100081;2. 北京理工大学软件学院,北京 100081)
摘要:近年来,虚拟人已经在医学、心理学等领域得到了广泛应用,但其对于焦虑情绪的舒缓作用尚未得到实证研究。为此,搭建了一套包含立体显示与表情、肢体、语音交互的虚拟人系统,并针对虚拟人对焦虑的舒缓效果开展系统深入的研究。通过立体显示原理搭建出显示真实度高的虚拟人系统。通过Virtual Human Toolkit开发包的改进,实现了虚拟人的动作驱动和中文语音交互,在此基础上针对焦虑情绪采用语音互动的方式,结合状态-特质焦虑量表和心电数据参数对舒缓效果分别进行主观和客观的评估。实验结果表明,通过高真实度的虚拟人系统对用与进行交流可以显着地舒缓焦虑情绪。
关键词:虚拟人;焦虑诱导;焦虑舒缓;语音交互;立体显示
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2578-08
Study of Virtual Human Voice Interaction on the Soothing Effects of Anxiety
Yang Yi1, Weng Dongdong1, Xue Song1, Su Mo2
(1. School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China; 2. School of Software, Beijing Institute of Technology, Beijing 100081, China)
Abstract: In recent years, virtual human has been widely applied in areas such as medicine, psychology and etc. However, its pacifying effect upon anxiety has not been empirically researched. For that reason, a human system including stereo display, face, motion and voice interaction was built as well as presenting a deep study of virtual human interaction on the soothing effects of anxiety. A stereoscopic virtual human system with high visual fidelity was built using the principle of 3d display. Chinese voice interaction as well as movement and expression driven function was achieved by improving Virtual Human Toolkit development package. With interactive voice guide as the anxiety pacifying method, the pacifying effect was assessed both subjectively and objectively by State-Trait Anxiety Inventory and ECG data parameters. The experiment results suggest that communicating and psychologically counseling via visual human system with high visual fidelity can relieve users’ anxiety significantly.
Keywords: virtual human; anxiety-inducing; relieve anxiety; voice interaction; stereo display
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一个面向老年人娱乐健身的体感严肃游戏研究
陈浩1,刘箴1,陈田2,刘婷婷1,刘翠娟1,朱宪莹1
(1.宁波大学信息科学与工程学院,浙江 宁波 315211;2.上海电机学院,上海 201306)
摘要:随着中国老龄人口数量的迅速增加,采用信息技术帮助居家老年人改善生活质量是一个令人感兴趣的热门话题。在总结体感交互技术相关应用研究的基础上,针对老年人上肢运动,设计了一个针对老年人的体感交互乒乓球游戏,采用智能体理论,建立了虚拟人的情绪推理规则,从而实现虚拟人用表情和语音提示来反馈用户的操作结果,初步的测试结果表明,该游戏能够简便操作,有望为老年人居家身体锻炼和情绪调节提供了一种新方法。
关键词:严肃游戏;体感交互;情绪模型;识别
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2586-07
Kinect Based Serious Game of Entertainment and Body Exercise for Elderly
Chen Hao1, Liu Zhen1, Chen Tian2, Liu Tingting1, Liu Cuijuan1, Zhu Xianying1
(1. Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China; 2. Shanghai Dianji University, Shanghai 201306, China)
Abstract: China's population is aging rapidly and it is an interesting topic to use information technology to help the elderly to improve the quality of life. Based on the study of relative researches on Kinect applications, a 3D interactive table tennis game for the elderly was designed to improve the upper limb movement of the elderly. Emotion reasoning rules were built with agent theory to let virtual human display the feedback of the user’s operation by facial expression and voice. Preliminary test results show that the game is easy to operate and can provide a new method for elderly to exercise at home and to regulate their emotions.
Keywords: serious game; kinect interaction; emotion model; recognition
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基于数据融合的多旋翼无人机定位控制器设计
王庆贺,万刚,曹雪峰,谢理想
(信息工程大学,郑州 450052)
摘要:建立了多旋翼无人机动力学模型,并设计了应用于室内环境下的多旋翼无人机定位控制器。为提高定位精度,在室内设置了特定标签,从而为无人机提供视觉数据。通过扩展卡尔曼滤波器,将无人机传感器获得的惯性数据和高度数据与视觉数据进行融合,再通过飞行状态估计得到无人机实时的飞行位置信息。仿真结果表明,在融合视觉数据后,无人机飞行中的位置误差明显减小,无人机的定位精度获得明显的提高,说明定位控制器取得了良好的控制效果。
关键词:动力学模型;视觉数据;扩展卡尔曼滤波;数据融合;定位控制器
中图分类号:TJ391; TJ761.1????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2593-07
Design of Multi-Rotor UAVs’ Positioning Controller Based on Data Fusion
Wang Qinghe, Wan Gang, Cao Xuefeng, Xie Lixiang
(Information Engineering University, Zhengzhou 450052, China)
Abstract: A dynamical model of multi-rotor UAVs was established, and a positioning controller of multi-rotor UAVs in an indoor environment was designed. In order to improve the accuracy of positioning, the specific tag was set to provide visual data for the UAV in interior space. Fusing the inertial data and the height data obtained from sensors of the UAV with visual data through the Extended Kalman Filter, and the UAV’s position was obtained from the estimation of flight state in real time. Simulation results show that the error of the UAV’s position reduces significantly after fusing the visual data, and the positioning accuracy of the UAV improved a lot, which shows that the controller works well.
Keywords: dynamical model; visual data; extended kalman filter; data fusion; positioning controller
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涌潮形态的三维实时虚拟仿真
方贵盛
(浙江水利水电学院 机械与汽车工程学院,杭州 310018)
摘要:涌潮作为一种世界独特的自然景观和旅游资源,对其研究可帮助人类掌握其运行规律,并实现防潮减灾、挖掘新的涌潮资源,因此具有非常重要的实际意义。传统的数值模拟研究方法在交互性、实时性、可视化方面都存在着较大的不足。采用了虚拟仿真技术对钱塘江涌潮的特性进行研究,通过基于光滑粒子动力学的纳维斯托克斯方程求解方法,实现动态交互、实时反馈的三维仿真效果。复演了涌潮的产生、发展和衰减过程,以及一线潮回头潮交叉潮、涌潮与丁坝交互等涌潮潮景现象,取得了较为逼着的动态效果,从而为进一步研究各种环境下涌潮的形态特性打下了坚实的基础。
关键词:涌潮;虚拟仿真;光滑粒子动力学;纳维斯托克斯方程
中图分类号:TP391.41????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2600-07
Real-time Virtual Simulation of Tidal Bore
Fang Guisheng
(School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China)
Abstract: Tidal bore is a kind of unique natural landscape and tourism resource in the world. Research on characteristic of tidal bore is very useful to help people realize surge prevention and disaster reduction and discover new resources of tidal bore. The traditional research method based on numerical simulation has great deficiencies in the aspect of interaction and real-time and visualization. The virtual simulation method was introduced to simulate the tidal bore. The Navier-Stokes equations were solved by the Smoothed Particle Hydrodynamics method to simulate dynamically the formation, evolution and dissipation of the tidal bore. The phenomena of the intersecting, reflection of the tidal bore, and line-type tidal bore, interaction between the tidal bore and the spur dike were replicated. The simulation results show that the virtual simulation method is a good tool to study the tidal bore.
Keywords: tidal bore; virtual simulation; smoothed particle hydrodynamics; navier-stokes equations
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城市轨道交通仿真系统中3D线路动态生成机制研究
严宝平
(南京艺术学院传媒学院,江苏 南京 210013)
摘要:虚拟现实艺术与技术的不断融合,有效地提升了传统虚拟仿真中的视觉呈现。在设计开发过程中,通过写实的3D建模设计配合高效的游戏引擎技术运用,可以完全真实地模拟出虚拟仿真对象的实际运行环境。针对这一领域技术实现与艺术设计相结合的特点,提出了基于城市轨道交通线路的科学肌理,配合数学分析与抽象,以独立构件相互拼接的方式完成整条线路无缝拼接的动态生成机制。该机制有效地降低了系统运行时的资源开销,进而在保障画面效果的基础上提升了运行效率。
关键词:轨道交通;虚拟仿真;游戏设计思维;动态线路
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2607-06
Research on Dynamic Generation of 3D Lines in City Rail Transit Simulation System
Yan Baoping
(School of Media, Nanjing University of the Arts, Nanjing 210013, China)
Abstract: The continuous integration of Virtual Reality Art and technology has effectively promoted the visual presentation of the traditional virtual simulation. In the process of design and development, through the realistic 3D modeling design with efficient game engine technology, the actual operation environment of virtual simulation objects could be completely simulated. In this field of combining with art design and technology, with science-based rule of rail transit, abstract and mathematical analysis, independent units were used to mutually splicing mechanism way. This mechanism effectively reduces the resource cost of the running system, it ensures the quality of the picture, and improves the efficiency of the implementation.
Keywords: rail transit; virtual simulation; game design thinking; dynamic line
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基于STL模型的散货船破损浮态计算
刘春雷,尹勇,孙霄峰,张秀凤,神和龙
(大连海事大学航海动态仿真和控制交通部重点实验室,辽宁 大连 116026)
摘要:为计算散货船破损浮态,基于船舶外壳及所有舱室的STL模型探讨了一种浮态迭代算法。根据STL模型建立船舶三维数据库。采用重量增加法迭代法计算船舶破损浮态。以散货船“DOLCE VITA”为例,计算了“压载进港”和“满载出港”载况下的5个货舱单舱破损情况,和船舶设计软件NAPA计算值相比,吃水差平均误差为0.013 6 m,横倾角平均误差为0.052°,进水量平均相对误差为0.28%,验证了算法的准确性。实验结果表明:STL模型来源于船舶设计数据,计算精度较高,应用前景较好;浮态迭代算法既可保证程序迭代次数,又能避免水线面要素求解,具有一定的工程应用价值。
关键词:船舶工程;STL;破损浮态;自由浮态;散货船
中图分类号:U661.2+1????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2613-08
Ship Damage Floatation Calculation Based on STL Model
Liu Chunlei, Yin Yong, Sun Xiaofeng, Zhang Xiufeng, Shen Helong
(Key Lab. of Marine Simulation & Control, Dalian Maritime University, Dalian 116026, China)
Abstract: In order to calculate the damaged floating state of bulk carrier,an iterative algorithm was discussed based on STL model of the ship shell and all the compartments. According to the STL model, the 3D database of ship was established, "weight Added method" and "iterative method" were used to calculate the floating state of the damage ship. Bulk carrier "DOLCE VITA" was taken as an example, “The normal ballast condition at arrival" and "Fully loaded with homogeneous cargo at departure" loading conditions were calculated, compared with calculated value of ship design software NAPA, the average error of trim is 0.012 3 m, the average error of heeling angle is 0.052°, and the average relative error of inflooded water is 0.28%. The accuracy of the algorithm was verified. Experimental results show that: STL model is derived from the ship design data, has high calculation accuracy, and has good application prospect. Floating state iteration algorithm, which can guarantee program iterations and avoid calculating the elements of water plane, has certain engineering application value.
Keywords: ship engineering; STL; damage floatation; free floatation; bulk carrier
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模型预测控制在船舶动力定位模拟器中的应用
钱小斌,尹勇,张秀凤,孙霄峰
(大连海事大学 航海动态仿真和控制实验室,大连 116026)
摘要:针对船舶动力定位模拟器中控制仿真系统的需要,提出了将含有积分器的模型预测控制算法应用于模拟器中。船舶动力定位模拟器主要用于动力定位操作人员的培训和适任评估,目前国内尚未开发出具有自主知识产权、功能完备的动力定位模拟器,主要依赖于国外进口。动力定位控制器是模拟器的核心技术之一,决定了模拟器的品质。考虑到未知缓变的海洋环境扰动对船舶的影响以及船舶推力的限制,设计了采用含有比例积分器的船舶动力定位模型预测控制器。该控制器能够使船舶在约束条件下克服外界扰动,到达并保持在期望位置。以一艘供给船为研究对象验证了算法的有效性。
关键词:动力定位模拟器;模型预测控制;约束;扰动
中图分类号:U666.158????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2620-06
Application of Model Prediction Control in Ship Dynamic Positioning Simulator
Qian Xiaobin, Yin Yong, Zhang Xiufeng, Sun Xiaofeng
(Lab. of Marine Simulation and Control, Dalian Maritime University, Dalian 116026, China)
Abstract: According to the requirement of ship Dynamic Positioning simulator control simulation system, a model predictive control scheme was proposed for DP simulator with the proportional integrator. Ship Dynamic Positioning simulator was mainly used for training and competency assessment of DP operator. At present, DP Simulator mainly depends on imports and there is no domestic DP simulator with independent intellectual property rights. Dynamic Positioning controller is one of the key technologies, which determines the performance of DP simulator. Considering the unknown slowly-varying marine environment disturbance and vessel constraints, a dynamic positioning controller was designed based on the model predictive control with proportional integrator. The controller could overcome the environment disturbance by the constrained force to reach and maintain the desired position and heading. The simulation experiments verify the effectiveness of the proposed algorithm.
Keywords: dynamic positioning simulator; model predictive control; constrains; disturbance
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基于Unity3D的能源站交互展示技术研究
何高奇1,2,杨凯林1,金1,陈琪1,李海杰3,潘志庚4
(1. 华东理工大学计算机科学与工程系,上海 200237,2. 华东师范大学地理信息科学教育部重点实验室,上海 200241,3. 万达信息股份有限公司研究发展中心,上海 201112,4. 杭州师范大学数字媒体与人机交互研究中心,杭州 310036)
摘要:本文以Unity3D为渲染引擎,构建一个基于Web的能源站交互展示系统,研究其中的交互、场景渲染和数据驱动的可视分析等关键技术。利用state模式,设计实现了五个视图层的低耦合交互虚拟展示逻辑框架从事件响应机制和按需触发,实现了简洁友好的用户交互机制。利用Unity3D为渲染引擎,实现了能源站场景的高质量可视化,包括动态材质变化、水管流水动画、建模和烘培利用json数据库中转实现外部数据访问功能,进而实现实时数据的动态图表展示。系统的应用实施表明上述虚拟交互设计极大地增强了场景真实感和用户体验性。
关键词:虚拟现实;在线交互;数据可视化;Unity3D;能源站展示
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2626-06
Interactive Illustration Technologies for Energy Stations Using Unity3D
He Gaoqi1,2, Yang Kailin1, Jin Yi1, Chen Qi1, Li Haijie3, Pan Zhigeng4
(1. Department of Computer Science and Engineering, East China University of Science and Technology, Shanghai 200237, China, 2. Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai, 200241, P.R.China, 3. Wonders Information Co., Ltd. R&D Center,Shanghai 201112, China, 4. Digital Media and Interaction Research Center, Hangzhou Normal University, Hangzhou 310036, China)
Abstract: This paper presents one web-based interactive illustration system for energy stations using Unity3D as render engine. Interaction, scene rendering and data-driven visual analysis are the key technologies for this study. One low-coupling logical framework of virtual illustration is designed for five view layers using state pattern. From the viewpoint of event response and trigger on-demand, one concise human-computer-interaction interface is carried out. High-quality visualization of energy station is realized using Unity3D, which includes dynamic texture, water animation in water pipe, modeling and bake. Json database is used as transfer hub for external data access. Thus the dynamic graphs of real-time data are shown on the web. Implementation of the above design validates the advantages of enhancing the scene realistic and user experience.
Keywords: virtual reality; online interaction; data visualization; unity3d; energy station illustartion
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运动捕捉技术在变电站虚拟环境中的应用研究
霍宇平1,张秀娥1,李兵1,李蔚清2
(1. 山西省电力公司技能培训中心大同分部,山西 大同 037049;2. 南京理工大学计算机科学与工程学院,江苏 南京 210094)
摘要:在沉浸式变电站仿真系统中,利用MEMS惯性运动捕捉系统,对操作员的肢体运动进行数据捕捉和分析;针对变电站典型操作定义了虚拟场景交互动作语义;采用网格搜索和交叉验证的SVM分类算法对变电站操作行为进行识别,根据识别后的动作驱动变电站场景中的虚拟人完成相关操作;提出了一种基于优先级的角色动画动作编排方法,通过指定权重控制多个动作同时发生时的变形系数,实现不同优先级动作的关键帧动画同时渲染;设计了同时支持角色动画序列和实时数据驱动两种模式的虚拟操作表现方法。研究成果在沉浸式变电站仿真系统中获得应用。
关键词:虚拟环境;运动捕捉;动作识别;变电站仿真培训
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2632-06
Research on Motion Capture in Substation Virtual Environment
Huo Yuping1, Zhang Xiu’e1, Li Bing1, Li Weiqing2
(1. Datong Electric Power Senior Technical School, Datong 037049, China; 2. School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
Abstract: In the immersive transformer training simulator, using MEMS inertial motion capture system, the operator’s motion data was captured and analyzed. According to the typical operation in the substation virtual environment, the semantics of interaction were studied. SVM classification algorithm based on grid search and cross validation was used to recognize operator’s gestures. The identified gestures were used to actuate the virtual human’s action in the substation virtual environment. A priority classified character animation method with deformation weight control was proposed to render different priority level actions at the same time. Two modes of virtual operation performance, character animation sequences and real time data-driven, were supported. An immersive transformer training simulator was realized and it worked fine.
Keywords: virtual environment; motion capture; gesture recognition; transformer training simulator
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船舶分段装焊工艺建模及狭小操作区域搜索方法
伍朝晖1,杨云飞2,蔡乾亚1,朱文敏2
(1.江南造船(集团)有限责任公司,上海 201913;2.上海交通大学智能制造与信息工程研究所,上海 200240)
摘要:针对船舶分段装焊过程中极易出现分段区域空间狭小、导致工人焊接作业困难的问题,提出了结合分段装焊工艺过程仿真的狭小操作区域搜索方法。建立了基于船体分段结构模型、焊接工艺信息模型、焊接仿真资源模型为基础的分段装焊工艺仿真模型。建立了人体焊接操作姿态空间简化模型,利用碰撞干涉对焊缝焊接所需的操作空间大小进行快速检测,实现基于装配工艺顺序的分段建造潜在狭小操作区域的求解,为船舶设计方案人机工学评估提供有效输入。基于上述方法开发了原型系统,并通过实例证明了本方法的有效性。
关键词:船舶分段建造;装焊工艺建模;狭小操作区域搜索;碰撞干涉检查
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 10-2638-08
Research on Welding Process Modeling and Narrow Operating Area Searching for Shipbuilding Block
Wu Zhaohui1, Yang Yunfei2, Cai Qianya1, Zhu Wenmin2
(1. Jiangnan Shipyard (Group) Co., Ltd., Shanghai 201913, China; 2. Institute of Intelligent Manufacturing and Information Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
Abstract: To solve the status that the welding operation is difficult because of the narrow segmented regions in shipbuilding block, the searching algorithm of narrow operating area combined with welding process simulation model was presented. Block model of ship, welding process model and welding resource model were completed to establish the block welding process simulation model. The collision and interference detection was used to check the space required by the welding operation rapidly, and then the potential narrow operating area based on the sequence planning of assembly process was achieved. The area can provide effective input for the man-machine engineering assessment of ship design. Prototype system was developed based on the methods above, and the effectiveness of this method has been proved by an example.
Keywords: shipbuilding block; welding process modeling; narrow operating area searching; collision and interference detection
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