Research On Anchor Handling Simulation System,
2020
Laboratory of Marine Simulation & Control, Dalian Maritime University, Dalian 116026, China;
Research On Anchor Handling Simulation System, Zhongxian Zhu, Yin Yong, Helong Shen
Journal of System Simulation
Abstract: Anchor handling simulator (AHS) can provide a good visualization platform for the researchers and the anchor handling trainees, and has important significance on improving the working environment and efficiency. To build the anchor handling simulation platform, the mooring system's dynamics model was established based on Lumped Mass Method(LMM), and the offshore platform and anchor handling vessel's mathematical models were introduced based on the existing technologies in marine simulator. By utilizing the OpenSceneGraph(OSG) scene management engine and applying a series of visualization technologies, realized the simulation of the anchor handling operations, a real-time …
Zenithal Pedestrian Detection Using Multiple Feature Fusion In Monocular Vision,
2020
1. Engineering Research Center of Optical Instrument and System of Ministry of Education, School of Optical Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;;2. Shanghai Key Laboratory of Modern Optical System,School of Optical Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
Zenithal Pedestrian Detection Using Multiple Feature Fusion In Monocular Vision, Chunhui Tang
Journal of System Simulation
Abstract: There were extensive literatures on pedestrian detection, mostly supposed that visible humans were observed in flat view. Sometimes pedestrian detection from another perspective should be considered. The pedestrian detection with a vertical view camera was taken into account, which was usually used to count the pedestrian number. A method is put forward for zenithal pedestrian detecting based on rectangular partition features, in which the pedestrian head detection takes place of the body detection. It is by the exhaustive scanning to find targets in an image and so all the candidates are put into a series of rectangular feature …
Virtual Reality In Transportation: A Survey,
2020
1. China Academy of Transportation Sciences, Beijing 100029, China;;
Virtual Reality In Transportation: A Survey, Zhaohui Wu, Guo Yu, Wang Hui, Xiuna Miao
Journal of System Simulation
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.
Aesthetic Assessment For Digital Portrait Photos,
2020
School of Information Science and Engineering, Yunnan University, Kunming 650504, China;
Aesthetic Assessment For Digital Portrait Photos, Zeen Tao, Yuanyuan Pu, Xu Dan, Yiwei Liu
Journal of System Simulation
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 …
Regional Credible Fusion Based Color-Texture Image Segmentation Approach,
2020
1. School of Information Engineering, Huang He Science and Technology College, Zhengzhou 450063, China;;2. School of Information Engineering, Zheng Zhou University, Zhengzhou 450060, China;
Regional Credible Fusion Based Color-Texture Image Segmentation Approach, Yang Yong, Guo Ling, Wenzheng Dai, Yangdong Ye
Journal of System Simulation
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, …
Multi-Agent Path Planning Maco Algorithm In Web3d Mountain Scene,
2020
Tongji University, Shanghai 201804, China;
Multi-Agent Path Planning Maco Algorithm In Web3d Mountain Scene, Fengting Yan, Jinyuan Jia
Journal of System Simulation
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 …
Virtual Viewpoint Synthesis Based On Grid Mapping,
2020
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;
Virtual Viewpoint Synthesis Based On Grid Mapping, Yao Li, Qiongying Wu, Xu Hui
Journal of System Simulation
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.
Algorithm For Rgbd Point Cloud Denoising And Simplification Based On K-Means Clustering,
2020
1. School of Computer and Information, Anqing Normal University, Anqing 246133, China;;2. The University Key Laboratory of Intelligent Perception and Computing of Anhui Province, Anqing 246133, China;;
Algorithm For Rgbd Point Cloud Denoising And Simplification Based On K-Means Clustering, Benyue Su, Jinyu Ma, Yusheng Peng, Sheng Min
Journal of System Simulation
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 …
3d Skull Surface Completion Method Based On Multi-Exemplars,
2020
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;;
3d Skull Surface Completion Method Based On Multi-Exemplars, Reziwanguli Xiamixiding, Guohua Geng, Gulisong Nasierding, Qingqiong Deng, Dilinuer Keyimu, Zulipiya Maimaitiming, Wanrong Zhao, Zheng Lei
Journal of System Simulation
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 …
Mono-Slam Based Method For Stitching Images Of Sequence From Uav,
2020
1. Information Engineering University, Zhengzhou 450002, China;;
Mono-Slam Based Method For Stitching Images Of Sequence From Uav, Yuelong Ma, Zhao Yong, Xuefeng Cao
Journal of System Simulation
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 …
Study On Irregular Projection Surface Depth Perception Geometric Correction,
2020
School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
Study On Irregular Projection Surface Depth Perception Geometric Correction, Baoxing Bai, Yang Fan, Han Cheng, Zhang Chao
Journal of System Simulation
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 …
Evaluation Method For Interior Layout Based On Voronoi Diagram,
2020
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;
Evaluation Method For Interior Layout Based On Voronoi Diagram, Milan Liu, Jiang Hao, Tianlu Mao, Zhaoqi Wang
Journal of System Simulation
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 generated moving lines in the scene by Voronoi Diagram. It could evaluate the interior layout objectively from aspects of patency, smoothness …
Multi-View Feature Learning Based On User Contributed Tag,
2020
1. School of Computer and Information Technology, Northeast Petroleum University, Daqing 163318, China;;
Multi-View Feature Learning Based On User Contributed Tag, Tian Feng, Fuhua Shang, Zhuoxuan Liu, Xukun Shen
Journal of System Simulation
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 …
Spatial Cues Gradient In Time Domain Based Audio Attention Computational Model,
2020
School of Mathematics and Computer Science, Hubei University of Arts and Science, Xiangyang 441053, China;
Spatial Cues Gradient In Time Domain Based Audio Attention Computational Model, Hang Bo, Wang Yi, Changqing Kang, Huang Jian
Journal of System Simulation
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 …
360-Degree Virtual Fitting Based On Kinect,
2020
Center for Digital Media Computing, Software School, Xiamen University, Xiamen 361005, China;
360-Degree Virtual Fitting Based On Kinect, Xiaoli Zhang, Junfeng Yao, Huang Ping
Journal of System Simulation
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 …
Visualization Of 2d Dynamic Vector Fields Based On Topology Analysis,
2020
1. Equipment Academy, Beijing 101416, China;;
Visualization Of 2d Dynamic Vector Fields Based On Topology Analysis, Li Chao, Lingda Wu, Bin Zhao
Journal of System Simulation
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 …
Graphics-Driver-Awared Heterogeneous Hardware-Accelerated Rendering Model,
2020
High Performance Computing Center, Institute of Applied Physics and Computational Mathematics, Beijing 100094, China;
Graphics-Driver-Awared Heterogeneous Hardware-Accelerated Rendering Model, Zhiwei Ai, Cao Yi, Xiao Li, Huawei Wang
Journal of System Simulation
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 …
Quadratic Rational Trigonometric Spline Curves With Shape Controlling,
2020
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;
Quadratic Rational Trigonometric Spline Curves With Shape Controlling, Xinru Liu, Manman Wei, Shengjun Liu, Dangfu Yang
Journal of System Simulation
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.
High-Level Descriptive Simulation Model For Underwater Virtual Maintenance,
2020
College of Geophysics and Information Engineering, China University of Petroleum, Beijing 102249, China;
High-Level Descriptive Simulation Model For Underwater Virtual Maintenance, Lianen Ji, Ruisheng Sun, Luan Qi
Journal of System Simulation
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 abstracted and described from the high-level application. All of the HDMUM components and their relationship were designed to …
Slicing Algorithm For Heterogeneous Nurbs Volume Parameterization Model,
2020
College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
Slicing Algorithm For Heterogeneous Nurbs Volume Parameterization Model, Chen Long, Ruan Chen, Wenyu Han
Journal of System Simulation
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 …
