When the hand and the forearm enter the available depth range of the depth camera, the data of the hand and the forearm will be extracted together. If process these data as a whole, which maybe affect some important algorithms such as the center of the palm estimation, the orientation of the hand estimation and hand tracing. The paper analyzes the motion features of the wrist and the contour features of the hand, takes advantage of the geometric characteristics of an inscribed rectangle and proposes a wrist recognition algorithm. In order to reduce the computing time of estimating the center of the palm, the paper analyzes the geometric characteristics of an acute triangle and an inscribed circle, combines the features of the hand interaction and proposes a new algorithm of estimating the center of the palm. Proved by the experiments, the wrist recognition algorithm can separate the hand from the forearm well, and the new algorithm of estimating the center of the palm has a distinct advantage over the original algorithms in the performance.
{"title":"Wrist Recognition and the Center of the Palm Estimation Based on Depth Camera","authors":"Zhengwei Yao, Zhigeng Pan, Shuchang Xu","doi":"10.1109/ICVRV.2013.24","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.24","url":null,"abstract":"When the hand and the forearm enter the available depth range of the depth camera, the data of the hand and the forearm will be extracted together. If process these data as a whole, which maybe affect some important algorithms such as the center of the palm estimation, the orientation of the hand estimation and hand tracing. The paper analyzes the motion features of the wrist and the contour features of the hand, takes advantage of the geometric characteristics of an inscribed rectangle and proposes a wrist recognition algorithm. In order to reduce the computing time of estimating the center of the palm, the paper analyzes the geometric characteristics of an acute triangle and an inscribed circle, combines the features of the hand interaction and proposes a new algorithm of estimating the center of the palm. Proved by the experiments, the wrist recognition algorithm can separate the hand from the forearm well, and the new algorithm of estimating the center of the palm has a distinct advantage over the original algorithms in the performance.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114349650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For the integrated motor propulsor, numerical model which integrated the internal and external flow field was established. Computational region discretization was carried out through using high quality multi-block structure grid based on CFD method. The flow field performance was calculated by adopting Reynolds time averaged method, and the steady hydrodynamic calculation was sealed off by using turbulence model. Based on the finite volume method and SIMPLEC algorithm, the pressure and method were coupled. Open water performance curve was given, indicating that the integrated motor propulsor has an ideal balance of performance and preferable efficiency. Pressure distribution along the meridian of blade at various heights has been analyzed. The single stage model was reliable and applicable for the research compared with the results of full stage model.
{"title":"Numerical Simulation of Steady Hydrodynamic Performance for Integrated Motor Propulsor on CFD","authors":"Pan Guang, Lu Lin","doi":"10.1109/ICVRV.2013.11","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.11","url":null,"abstract":"For the integrated motor propulsor, numerical model which integrated the internal and external flow field was established. Computational region discretization was carried out through using high quality multi-block structure grid based on CFD method. The flow field performance was calculated by adopting Reynolds time averaged method, and the steady hydrodynamic calculation was sealed off by using turbulence model. Based on the finite volume method and SIMPLEC algorithm, the pressure and method were coupled. Open water performance curve was given, indicating that the integrated motor propulsor has an ideal balance of performance and preferable efficiency. Pressure distribution along the meridian of blade at various heights has been analyzed. The single stage model was reliable and applicable for the research compared with the results of full stage model.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116484915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In traditional map, considering only the river itself, we use fine line to thick line from upstream to downstream, but without the relationship of rivers. Paper assign the width of river based on the structural model of the water system, to avoid the conflicting situation, and realize the automatic drawing of river system by using the gradient method of drawing the river. This method can reflect the overall water distribution and overall shape really, to achieve the visual expression of water, and reflects the region's geographical features, and makes a map better expressed.
{"title":"Research on the Symbolization Method of Single-Line Rivers Based on the River System Structure","authors":"Wan Wei-wu, Zhuzhi Xia, Li Xian","doi":"10.1109/ICVRV.2013.60","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.60","url":null,"abstract":"In traditional map, considering only the river itself, we use fine line to thick line from upstream to downstream, but without the relationship of rivers. Paper assign the width of river based on the structural model of the water system, to avoid the conflicting situation, and realize the automatic drawing of river system by using the gradient method of drawing the river. This method can reflect the overall water distribution and overall shape really, to achieve the visual expression of water, and reflects the region's geographical features, and makes a map better expressed.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124947500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to reduce the cost of flight test and enhance the skills of manipulator, a kind of new solution of unmanned aerial vehicle real-time flight simulation and training system based on XNA framework was put forward. the function module and the structure of system were brought forward, and key technologies such as dynamics and motion model, control interface, human-computer interaction function and visual display were discussed and implemented as well as relevant algorithms. In the dynamic model, the standard four element method was used to describe the attitude angle and the differential equations were solved by the fourth-order runge-kutta method, In the visual module, the principle of infinite terrain generate 3D terrain surface and particle system generated some effects such as rain, snow, fog and explosion et al., In the control module, the human-computer interaction function was achieved by Instructor class of the XNA framework interface. Finally, the system development was realized based on Visual Studio environment and C# language, flight training was simulated in this system by manipulating the handle and controlling the interface, and the feasibility and validity were verified.
{"title":"Fixed-Wing Aircraft Interactive Flight Simulation and Training System Based on XNA","authors":"Wang Wei, L. Dongsheng, Liu Chun","doi":"10.1109/ICVRV.2013.37","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.37","url":null,"abstract":"In order to reduce the cost of flight test and enhance the skills of manipulator, a kind of new solution of unmanned aerial vehicle real-time flight simulation and training system based on XNA framework was put forward. the function module and the structure of system were brought forward, and key technologies such as dynamics and motion model, control interface, human-computer interaction function and visual display were discussed and implemented as well as relevant algorithms. In the dynamic model, the standard four element method was used to describe the attitude angle and the differential equations were solved by the fourth-order runge-kutta method, In the visual module, the principle of infinite terrain generate 3D terrain surface and particle system generated some effects such as rain, snow, fog and explosion et al., In the control module, the human-computer interaction function was achieved by Instructor class of the XNA framework interface. Finally, the system development was realized based on Visual Studio environment and C# language, flight training was simulated in this system by manipulating the handle and controlling the interface, and the feasibility and validity were verified.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123808677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper proposes a fault tolerant optimal scheduling mechanism based on dependency analysis to make large-scale video surveillance systems more efficient and more reliable. We study large-scale video surveillance systems and associated theoretical issues, and then analyze the efficiency and reliability that application obtained in large-scale video surveillance systems under constrained circumstance through decision analysis and optimization theory, and finally validate and optimize the scheduling model through experimental analysis. The experiments indicate the proposed scheduling mechanism can effectively improve the global analysis job completion ratio and ensure the efficiency and reliability of the large-scale video surveillance network.
{"title":"Fault-Tolerant Video Analysis Cloud Scheduling Mechanism","authors":"Yaqin Luo, Jie Dai, Li Qi","doi":"10.1109/ICVRV.2013.27","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.27","url":null,"abstract":"This paper proposes a fault tolerant optimal scheduling mechanism based on dependency analysis to make large-scale video surveillance systems more efficient and more reliable. We study large-scale video surveillance systems and associated theoretical issues, and then analyze the efficiency and reliability that application obtained in large-scale video surveillance systems under constrained circumstance through decision analysis and optimization theory, and finally validate and optimize the scheduling model through experimental analysis. The experiments indicate the proposed scheduling mechanism can effectively improve the global analysis job completion ratio and ensure the efficiency and reliability of the large-scale video surveillance network.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115063716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhilong Liu, Xuezheng Zhu, Yuguang Wang, Yaoxin Wu, Xun Sun
This article describes functions of the virtual disassembly and assembly training system of a plunger pump, explains the design and development of the system. The threedimensional model of a plunger pump is set up based on Solidworks, and an interactive training system of virtual disassembly and assembly of the plunger pump is designed and implemented with the 3DVIA Composer. Key technologies involved in the process including modeling, planning of disassembly sequence, interactive control, motion simulation and animation are studied. Finally, system resources are integrated with MS Office PowerPoint as release platform.
{"title":"Design and Implementation of the Star Finder Simulator Software","authors":"Zhilong Liu, Xuezheng Zhu, Yuguang Wang, Yaoxin Wu, Xun Sun","doi":"10.1109/ICVRV.2013.71","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.71","url":null,"abstract":"This article describes functions of the virtual disassembly and assembly training system of a plunger pump, explains the design and development of the system. The threedimensional model of a plunger pump is set up based on Solidworks, and an interactive training system of virtual disassembly and assembly of the plunger pump is designed and implemented with the 3DVIA Composer. Key technologies involved in the process including modeling, planning of disassembly sequence, interactive control, motion simulation and animation are studied. Finally, system resources are integrated with MS Office PowerPoint as release platform.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126462331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Simulating the process of fruit disease using computer techniques can help make effective prevention and establish corresponding treatment. Aging and blemish in fruits' appearance can also enhance the realism of a synthetic scene, with wide applications in virtual reality, games, and special effects. However, little attention has been paid in such field. This paper proposed a novel method for simulation of fruit ring rot process, which is one of the main diseases of fruits. An improved reaction diffusion model was adopted to model the colony formation. This model enables simulating the growth and movement of fruit ring rot accurately, accounting for different properties of different fruits including ambient temperature, humidity, skin thickness and porosity, etc. The initial nutrient parameters can be friendly designed according to ring rot characteristics. The software of Maya is utilized for fruit modeling and disease area rendering. Various results show that our method can produce the similar fruit ring rot symptom to the real data, providing technical supports for teaching, scientific research as well as promotion of agricultural science and technology.
{"title":"Fruit Ring Rot Simulation Based on Reaction-Diffusion Model","authors":"Dongfang Fan, Shiguang Liu, Yin-wei Wei","doi":"10.1109/ICVRV.2013.38","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.38","url":null,"abstract":"Simulating the process of fruit disease using computer techniques can help make effective prevention and establish corresponding treatment. Aging and blemish in fruits' appearance can also enhance the realism of a synthetic scene, with wide applications in virtual reality, games, and special effects. However, little attention has been paid in such field. This paper proposed a novel method for simulation of fruit ring rot process, which is one of the main diseases of fruits. An improved reaction diffusion model was adopted to model the colony formation. This model enables simulating the growth and movement of fruit ring rot accurately, accounting for different properties of different fruits including ambient temperature, humidity, skin thickness and porosity, etc. The initial nutrient parameters can be friendly designed according to ring rot characteristics. The software of Maya is utilized for fruit modeling and disease area rendering. Various results show that our method can produce the similar fruit ring rot symptom to the real data, providing technical supports for teaching, scientific research as well as promotion of agricultural science and technology.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123758929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhilong Liu, Xuezheng Zhu, Yuguang Wang, Yaoxin Wu, Xun Sun
This article describes functions of the virtual disassembly and assembly training system of a plunger pump, explains the design and development of the system. The three dimensional model of a plunger pump is set up based on Solid works, and an interactive training system of virtual disassembly and assembly of the plunger pump is designed and implemented with the 3DVIA Composer. Key technologies involved in the process including modeling, planning of disassembly sequence, interactive control, motion simulation and animation are studied. Finally, system resources are integrated with MS Office Power Point as release platform.
介绍了柱塞泵虚拟拆装培训系统的功能，阐述了该系统的设计与开发。基于Solid works建立了柱塞泵的三维模型，利用3DVIA Composer设计并实现了柱塞泵虚拟拆装交互训练系统。研究了拆装过程中涉及的建模、拆装顺序规划、交互控制、运动仿真和动画制作等关键技术。最后，将系统资源整合到MS Office Power Point作为发布平台。
{"title":"Design and Implementation of Virtual Disassembly and Assembly Training System of Plunger Pump","authors":"Zhilong Liu, Xuezheng Zhu, Yuguang Wang, Yaoxin Wu, Xun Sun","doi":"10.1109/ICVRV.2013.18","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.18","url":null,"abstract":"This article describes functions of the virtual disassembly and assembly training system of a plunger pump, explains the design and development of the system. The three dimensional model of a plunger pump is set up based on Solid works, and an interactive training system of virtual disassembly and assembly of the plunger pump is designed and implemented with the 3DVIA Composer. Key technologies involved in the process including modeling, planning of disassembly sequence, interactive control, motion simulation and animation are studied. Finally, system resources are integrated with MS Office Power Point as release platform.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130405574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the development of inexpensive depth cameras and stereo displays, augmented reality systems that blend physical reality and virtual objects become affordable for everyone. Unlike most existing stereoscopic systems that display the same imagery when watched from distinct directions, we present a system that tracks user's head. Real-time images are rendered according to the viewing position. Dynamic images will be displayed on to the screen so we can see different parts of a virtual object when wearing a pair of polarized glasses. A palm-based interaction is introduced so that user can manipulate the virtual object, this creates a more vivid illusion that a real object is set at the physical scene. We also run a simple test to assess the visual comfort of this system.
{"title":"A View-Dependent Stereoscopic System Using Depth-Image-Based Tracking","authors":"Feng Chen, Yue Liu","doi":"10.1109/ICVRV.2013.57","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.57","url":null,"abstract":"With the development of inexpensive depth cameras and stereo displays, augmented reality systems that blend physical reality and virtual objects become affordable for everyone. Unlike most existing stereoscopic systems that display the same imagery when watched from distinct directions, we present a system that tracks user's head. Real-time images are rendered according to the viewing position. Dynamic images will be displayed on to the screen so we can see different parts of a virtual object when wearing a pair of polarized glasses. A palm-based interaction is introduced so that user can manipulate the virtual object, this creates a more vivid illusion that a real object is set at the physical scene. We also run a simple test to assess the visual comfort of this system.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127787255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Majority of present applications used buttons or touch panels as their human-computer interface. The limitation of these methods is that users can not interact with the equipments in a natural way, since people should operate the equipments according to certain rules which are arranged beforehand. This paper proposes a novel interactive system which is controlled by user's natural motion. An omni-directional display goes with the system and it gives users full field of view. In addition, the system contains a target following photography equipment and it provides on-line video chat and remote monitoring functions. The interactive system can be considered as a new form of human-computer interface and the advantages and potential of it are discussed in this paper. Finally, a demonstration and experimental results are given to evaluate the validity of the system.
{"title":"Motion Interactive System with Omni-Directional Display","authors":"Dong Li, Dongdong Weng, Haiyun Zhou, Jinghui Xie","doi":"10.1109/ICVRV.2013.45","DOIUrl":"https://doi.org/10.1109/ICVRV.2013.45","url":null,"abstract":"Majority of present applications used buttons or touch panels as their human-computer interface. The limitation of these methods is that users can not interact with the equipments in a natural way, since people should operate the equipments according to certain rules which are arranged beforehand. This paper proposes a novel interactive system which is controlled by user's natural motion. An omni-directional display goes with the system and it gives users full field of view. In addition, the system contains a target following photography equipment and it provides on-line video chat and remote monitoring functions. The interactive system can be considered as a new form of human-computer interface and the advantages and potential of it are discussed in this paper. Finally, a demonstration and experimental results are given to evaluate the validity of the system.","PeriodicalId":179465,"journal":{"name":"2013 International Conference on Virtual Reality and Visualization","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134464691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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