Virtual reality technologies dramatically change the game experience when compared to most popular console games. VR systems may provide a higher user involvement due to the possibility of stereo visualization, human-body interaction, large playing space, etc. The role of photorealism in games will then need to be reconsidered as this plays a bigger and different role in system with large and stereo displays. In this paper we analyze the role of photorealism and stereo viewing when using virtual reality technologies for computer games. Results from a series of tests performed on a 6-sided CAVE and large panorama environments were compared with those of a PC-desktop.
{"title":"Photorealistic VR Games?","authors":"S. Livatino","doi":"10.1109/ICAT.2007.52","DOIUrl":"https://doi.org/10.1109/ICAT.2007.52","url":null,"abstract":"Virtual reality technologies dramatically change the game experience when compared to most popular console games. VR systems may provide a higher user involvement due to the possibility of stereo visualization, human-body interaction, large playing space, etc. The role of photorealism in games will then need to be reconsidered as this plays a bigger and different role in system with large and stereo displays. In this paper we analyze the role of photorealism and stereo viewing when using virtual reality technologies for computer games. Results from a series of tests performed on a 6-sided CAVE and large panorama environments were compared with those of a PC-desktop.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115753713","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}
My research is concerned with 'explorable virtual worlds', usually those that are 'artworks', dealing with aesthetic and affective domains. Whilst developing theoretical enquiries I have come across a number of issues of terminology and word use. Particularly problematic are terms such as 'game', 'games', and 'play'. This paper is a broad survey of some of those issues and key theorists in the field.
{"title":"Playing in a Virtual World: Exploration and Aspects of Play","authors":"A. Gazzard","doi":"10.1109/ICAT.2007.27","DOIUrl":"https://doi.org/10.1109/ICAT.2007.27","url":null,"abstract":"My research is concerned with 'explorable virtual worlds', usually those that are 'artworks', dealing with aesthetic and affective domains. Whilst developing theoretical enquiries I have come across a number of issues of terminology and word use. Particularly problematic are terms such as 'game', 'games', and 'play'. This paper is a broad survey of some of those issues and key theorists in the field.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116914887","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 the design of a large-scale device, it is very important to confirm that there is no interference or spatial conflict among the parts. Virtual reality devices have been used in various fields as design support systems, but detecting collisions between complex parts in real-time has been difficult. We have created a system that can detect collision and interference in real-time in a virtual reality system.
{"title":"Construction of Virtual Assembly System with Real-Time Collision Detection","authors":"Y. Tamura, N. Mizuguchi, S. Matsumoto, H. Ueki","doi":"10.1109/ICAT.2007.33","DOIUrl":"https://doi.org/10.1109/ICAT.2007.33","url":null,"abstract":"In the design of a large-scale device, it is very important to confirm that there is no interference or spatial conflict among the parts. Virtual reality devices have been used in various fields as design support systems, but detecting collisions between complex parts in real-time has been difficult. We have created a system that can detect collision and interference in real-time in a virtual reality system.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129797390","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}
Byung-Kuk Seo, Moon-Hyun Lee, Hanhoon Park, Jong-Il Park, Young Soo Kim
In the field of computer aided surgery, augmented reality (AR) technology has been successfully used for enhancing accuracy of surgery and making surgeons convenient by visually assisting them in performing a number of complicated and time-consuming medical operations. However, there are still medical operations that do not receive the benefit of AR technology. As a representative one, surgeons still use an ink pen when they mark surgical targets for scheduling an operation. The ink pen is inconvenient because the mark drawn by the foreign matter is not easily modified or deleted. And the ink pen is also unlikely to be sanitary. In this paper, we propose an interactive user interface based on direct-projected augmented reality (DirectAR) technology for handling all these problems with the ink pen and its validity is shown in experimental results.
{"title":"Direct-Projected AR Based Interactive User Interface for Medical Surgery","authors":"Byung-Kuk Seo, Moon-Hyun Lee, Hanhoon Park, Jong-Il Park, Young Soo Kim","doi":"10.1109/ICAT.2007.42","DOIUrl":"https://doi.org/10.1109/ICAT.2007.42","url":null,"abstract":"In the field of computer aided surgery, augmented reality (AR) technology has been successfully used for enhancing accuracy of surgery and making surgeons convenient by visually assisting them in performing a number of complicated and time-consuming medical operations. However, there are still medical operations that do not receive the benefit of AR technology. As a representative one, surgeons still use an ink pen when they mark surgical targets for scheduling an operation. The ink pen is inconvenient because the mark drawn by the foreign matter is not easily modified or deleted. And the ink pen is also unlikely to be sanitary. In this paper, we propose an interactive user interface based on direct-projected augmented reality (DirectAR) technology for handling all these problems with the ink pen and its validity is shown in experimental results.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131016049","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}
S. R. R. Sanches, A. Sementille, I. А. Rodello, J. Brega
A classic problem in the development of mixed reality systems is the registration. The correct alignment between virtual objects and the real elements is extremely important for the coherent composition of the resultant scene. Considering this context, this paper describes an approach for the composition of scenes in mixed reality environments using the chromakey technique for the extraction of real objects. After that, the scene is mounted in a coherent way related to the depth in OpenGL framebuffer for posterior rendering.
{"title":"The Generation of Scenes in Mixed Reality Environments using the Chromakey Technique","authors":"S. R. R. Sanches, A. Sementille, I. А. Rodello, J. Brega","doi":"10.1109/ICAT.2007.30","DOIUrl":"https://doi.org/10.1109/ICAT.2007.30","url":null,"abstract":"A classic problem in the development of mixed reality systems is the registration. The correct alignment between virtual objects and the real elements is extremely important for the coherent composition of the resultant scene. Considering this context, this paper describes an approach for the composition of scenes in mixed reality environments using the chromakey technique for the extraction of real objects. After that, the scene is mounted in a coherent way related to the depth in OpenGL framebuffer for posterior rendering.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128904399","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}
S. Yamaguchi, Takahide Tanaka, H. Viet, Y. Takama, Y. Tsujino, Hiromi T. Tanaka
A volume-based realistic communication system called Haptic Communication is described. The system allows participants to interact in real time with others at remote locations on the network using haptic perception (sense of touch) of soft objects in virtual environments. We constructed the system so that it provides a sense of touch at remote locations in real time. First, an adaptive volume model represents virtual soft objects in PCs at remote locations. Next, the reflection force of the soft object is calculated rapidly and accurately from the parameters of positions and forces at contacting points transmitted via network at each PC. Eventually, the haptic and visual information are rendered by a haptic device (PHANToM) and a volume graphic software in the PCs. We investigated the efficiency of our system via experiments on a simulation of needle insertion with high force feedback rates at two remote locations on a WAN between Ritsumeikan University, Biwako Kusatsu Campus and Shiga Medical University. The experiment results show that the delay due to network traffic is negligible.
{"title":"Toward Real-time Volume-based Haptic Communication with Realistic Sensation","authors":"S. Yamaguchi, Takahide Tanaka, H. Viet, Y. Takama, Y. Tsujino, Hiromi T. Tanaka","doi":"10.1109/ICAT.2007.47","DOIUrl":"https://doi.org/10.1109/ICAT.2007.47","url":null,"abstract":"A volume-based realistic communication system called Haptic Communication is described. The system allows participants to interact in real time with others at remote locations on the network using haptic perception (sense of touch) of soft objects in virtual environments. We constructed the system so that it provides a sense of touch at remote locations in real time. First, an adaptive volume model represents virtual soft objects in PCs at remote locations. Next, the reflection force of the soft object is calculated rapidly and accurately from the parameters of positions and forces at contacting points transmitted via network at each PC. Eventually, the haptic and visual information are rendered by a haptic device (PHANToM) and a volume graphic software in the PCs. We investigated the efficiency of our system via experiments on a simulation of needle insertion with high force feedback rates at two remote locations on a WAN between Ritsumeikan University, Biwako Kusatsu Campus and Shiga Medical University. The experiment results show that the delay due to network traffic is negligible.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"135 24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117347768","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}
Several tracking techniques for augmented reality have been proposed. In feature point tracking, a pose is computed by minimizing the error between the observed 2D feature points and the back-projected feature points from the 3D scene model. This minimization problem is usually solved by nonlinear optimization. The main advantage of this approach is its accuracy. However, it is difficult to compute the correct pose unless an appropriate initial value is used. In addition, when an observation contains some errors, this approach does not guarantee a correct pose even if it converges to the global minimum. Therefore, once an incorrect pose is computed in a frame, either the tracking in the next frame may fail or the result will deviate from the correct pose. In this paper, we propose a new tracking framework for augmented reality. The proposed method tracks features as multiple local hypotheses based on not just one pose but multiple poses that are computed from pose estimation in the previous frame. Since multiple poses are maintained as global hypotheses, as long as the correct pose is contained in the hypotheses, tracking can be continued even in difficult situations such as a simple iterative scene with high-speed movements.
{"title":"A New Framework for Tracking by Maintaining Multiple Global Hypotheses for Augmented Reality","authors":"K. Hayashi, H. Kato, S. Nishida","doi":"10.1109/ICAT.2007.45","DOIUrl":"https://doi.org/10.1109/ICAT.2007.45","url":null,"abstract":"Several tracking techniques for augmented reality have been proposed. In feature point tracking, a pose is computed by minimizing the error between the observed 2D feature points and the back-projected feature points from the 3D scene model. This minimization problem is usually solved by nonlinear optimization. The main advantage of this approach is its accuracy. However, it is difficult to compute the correct pose unless an appropriate initial value is used. In addition, when an observation contains some errors, this approach does not guarantee a correct pose even if it converges to the global minimum. Therefore, once an incorrect pose is computed in a frame, either the tracking in the next frame may fail or the result will deviate from the correct pose. In this paper, we propose a new tracking framework for augmented reality. The proposed method tracks features as multiple local hypotheses based on not just one pose but multiple poses that are computed from pose estimation in the previous frame. Since multiple poses are maintained as global hypotheses, as long as the correct pose is contained in the hypotheses, tracking can be continued even in difficult situations such as a simple iterative scene with high-speed movements.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122489052","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}
M. Furukawa, M. Ohta, S. Miyajima, M. Sugimoto, S. Hasegawa, M. Inami
We developed SmartTool as a part of a study of augmented reality. In this paper, we introduce micro spidar. The design goal was to enable micro spidar to support micro operations at a millimeter-scale. We report a trial implementation showing the modality transformation of brightness information of the surface condition into a sensation of force feedback.
{"title":"Support System for Micro Operation using a Haptic Display Device","authors":"M. Furukawa, M. Ohta, S. Miyajima, M. Sugimoto, S. Hasegawa, M. Inami","doi":"10.1109/ICAT.2007.38","DOIUrl":"https://doi.org/10.1109/ICAT.2007.38","url":null,"abstract":"We developed SmartTool as a part of a study of augmented reality. In this paper, we introduce micro spidar. The design goal was to enable micro spidar to support micro operations at a millimeter-scale. We report a trial implementation showing the modality transformation of brightness information of the surface condition into a sensation of force feedback.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131166068","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}
M. Haraguchi, T. Kikuchi, Ying Jin, K. Fukushima, J. Furusho, A. Inoue, K. Oda
Rehabilitation for upper limbs is important for elderly people, people who have suffered a stroke and so on. In recent years, the needs for rehabilitation support systems are increasing, which use robot technology and virtual reality technology. Applying these technologies make efficient rehabilitation possible. But there was few rehabilitation support robot system for 3-D training with high safety. So we have developed three different rehabilitation machines for upper limbs: "EMUL", "Robotherapist" and "PLEMO". In this paper, we introduce the recent researches of each robot.
{"title":"3-D Rehabilitation Systems for Upper Limbs Using ER Actuators/Brakes with High Safety: \"EMUL\", \"Robotherapist\" and \"PLEMO\"","authors":"M. Haraguchi, T. Kikuchi, Ying Jin, K. Fukushima, J. Furusho, A. Inoue, K. Oda","doi":"10.1109/ICAT.2007.39","DOIUrl":"https://doi.org/10.1109/ICAT.2007.39","url":null,"abstract":"Rehabilitation for upper limbs is important for elderly people, people who have suffered a stroke and so on. In recent years, the needs for rehabilitation support systems are increasing, which use robot technology and virtual reality technology. Applying these technologies make efficient rehabilitation possible. But there was few rehabilitation support robot system for 3-D training with high safety. So we have developed three different rehabilitation machines for upper limbs: \"EMUL\", \"Robotherapist\" and \"PLEMO\". In this paper, we introduce the recent researches of each robot.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133987298","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}
Present augmented reality systems are isolated islands with no or little capability to receive 3D information from the outside world. In this paper we describe how Google Earth can be used to transform the physical world into an AR mailbox. We demonstrate a system where a mobile phone AR environment can be defined and advertised by a portal, using a simple visual/tangible approach. The focus has been on the ease of use. The current limitations are tracking stability and lack of high quality Google Earth content.
{"title":"Augmented Earth: Towards Ubiquitous AR Messaging","authors":"Anders Henrysson, M. Andel","doi":"10.1109/ICAT.2007.48","DOIUrl":"https://doi.org/10.1109/ICAT.2007.48","url":null,"abstract":"Present augmented reality systems are isolated islands with no or little capability to receive 3D information from the outside world. In this paper we describe how Google Earth can be used to transform the physical world into an AR mailbox. We demonstrate a system where a mobile phone AR environment can be defined and advertised by a portal, using a simple visual/tangible approach. The focus has been on the ease of use. The current limitations are tracking stability and lack of high quality Google Earth content.","PeriodicalId":110856,"journal":{"name":"17th International Conference on Artificial Reality and Telexistence (ICAT 2007)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133965662","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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