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23.14
Displaying 1-15 of 15 articles from this issue
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Article type: Cover
Pages Cover1-
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (14K) -
Article type: Index
Pages Toc1-
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (63K) -
Masatoshi Matsumiya, Kiyoshi Kiyokawa, Haruo Takemura, Naokazu YokoyaArticle type: Article
Session ID: NIM99-54
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSMost of existing 3D-CAD and 3D-CG softwares have problems in intuitive manipulation and understanding of 3D curved surfaces. This paper describes a prototype of an immersive modeler which enables us to design 3D solid objects composed of curved surfaces intuitively and interactively. We employ implicit surfaces to deform an object precisely. To reduce the time required for rendering curved surfaces enough to interactive modeling, we have developed an algorithm which generates polygon patches from implicit surface representations. Experiments have shown that a user of the system can design 3D solid objects composed of curved surfaces in a short time by deforming objects intuitively by hand in real-time.View full abstractDownload PDF (1205K) -
Hiroaki Zaima, Kiyoshi Kiyokawa, Haruo Takemura, Naokazu YokoyaArticle type: Article
Session ID: NIM99-55
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe propose a design method of interactive animation within an immersive modeler that makes 3-Ddesign intuitive. Interactive animation can be considerd to have two atteibutes: the motion patterns and the triggers. We provide two kinds of primitives corresponding to these attributes. With the proposed method, virtual 3-D objects including various animation attirbutes can be created by simply combining their primitives, to design interactive animation. A prototype system has shown the effectiveness of the method for creating simple interactive animation in a short time.View full abstractDownload PDF (1285K) -
Masahiko TsukamotoArticle type: Article
Session ID: NIM99-56
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have proposed so far a method for constructing pseudo-3D space with low cost on WWW, based on scenic images such as those taken by a digital camera or a video camera. We call the method IBNR(Image-Based Non-Rendering). In this paper, we propose an XML-based language for describing an IBNR scene. Using this language, we can define each scene in a highly independent manner from other scenes by describing several kinds of objects, such as the background image, an avatar, and stationary objects. We show the usage of functions of the language by showing several useful examples. We also showour design and implementation of a converter from the proposed language to dynamic HTML.View full abstractDownload PDF (1476K) -
Communication mechanism for shared virtual space with consideration for realtimeness and reliabilityDaisuke Kado, Kazutoshi Fujikawa, Shinji Shimojo, Hideo MiyaharaArticle type: Article
Session ID: NIM99-57
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSUsers on computer networks can share virtual spaces easily by exchanging their descriptions of Virtual Reality Modeling Language(VRML). Besides, users have to exchange the additional information such as their motion. To achieve the smooth interaction among users, the information must be delivered in real-time. Moreover, to keep the consistency of the virtual spaces of users, the information delivery must be reliable. however, in case of a shared virtual space on the Internet, it is difficult to achieve the real-time and reliable delivery. In this paper, we propose a new delivery mechanism for a shared virtual space, which use the peer-to-peer communication for the reliability and the multicast communication for the realtimeness. To achieve the smooth interaction and the consistency of the virtual spaces, this mechanism chooses the communication method dynamically according to the data type, the user's position, and the system resource availability.View full abstractDownload PDF (1024K) -
Takayuki Tsutsui, Hiroshi Dohi, Mitsuru IshizukaArticle type: Article
Session ID: NIM99-58
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn order to make a new information presentation software and a new information contents production tool in the WWW, we pay our attention to use interactive multimodal life-like agents which have verbal conversation capability. For this purpose, we have developed MPML(Multimodal Presentation Markup Language)which allows many users to write attractive multimodal presentations easily. MPML is a markup language conformed to XML(Extensible Markup Language)and supports functions for contoroling verbal presentations and scripting agent behaviors. In this paper, we present MPML and its related tools developed by us.View full abstractDownload PDF (1136K) -
Shan Lu, Seiji IgiArticle type: Article
Session ID: NIM99-59
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes a Japanese-Sign-Language(JSL)database system to store and retrieve the JSL word. The people with hearing-impairment performs JSL words, and synchronized four sets of video camera records their movements from four orientations. The video picture of each word is digitized and stored in this database with the different spatial resolution and formats. Therefore, this database has feasibility to provide the suitable formatted video pictures according to the network speed. This database has collected and stored over 4000 JSL words. It not only provides the MPEG1-formated video picture via World-Wide-Web, but also provides the very high resolution(720x480)video picture to satisfy the need of image analysis in the local area network.View full abstractDownload PDF (1329K) -
Norifumi KIKKAWA, Goro KUNITO, Kiyoharu AIZAWA, Mitsutoshi HATORIArticle type: Article
Session ID: NIM99-60
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn multi-agent system, it is very popular to process with Multipoint-to-Multipoint communication. On the other hand, communicating multiple agents with one agent which has central role makes it possible to exist the system which doesn't require so complex deduction mechanism. We propose a hirrarchical multi-agent system. In this system, agents on the host in the hierarchical network comunicate with each other to transport lots of data. Moreover we inplemented this system actually and examined the effect of this dynamic restructuring function. Consequently, we got a good result.View full abstractDownload PDF (1070K) -
Goro KUNITO, Kiyoharu AIZAWA, Mitsutoshi HATORIArticle type: Article
Session ID: NIM99-61
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper presents a new application of mobile agents for World Wide Web Search System. Mobile-agents, which move in networks, play a large part in achieving seamless communication, they provide efficient communication especially in mobile computing environment. We often use WWW search engines since WWW space is too large to find destination contents. A full text search system is very useful to find data not only in WWW space but also in private contents, mail, news, calendar, etc. The purpose of this article is to make cooperative search engine system with mobile agents. Cooperative search engines can be expected to be a good application for mobile agents in future personal mobile communication.View full abstractDownload PDF (780K) -
Mariko KURIHARA, Norihito TAKATORI, Tsugihiko OHNO, Yoshiki SHIMOTSUMAArticle type: Article
Session ID: NIM99-62
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have developed a distance learning system for distance seminars and self-educated learning. The features of the system are synchronized multimedia contents function, easy authoring environment, various kinds of configurations and so on. In this paper, we outlined its requirement, the functionality and the methods for the system.View full abstractDownload PDF (604K) -
Masashi Murota, Atsuo Yoshitaka, Masahito Hirakawa, Tadao IchikawaArticle type: Article
Session ID: NIM99-63
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSPeople Collaborating in the same Place can communicate each other, anytime as they like, apart from the actual collaboration required. Thus the better collaboration is achieved compared to the case for the collaboration between distant place. In this paper, we propose a method to extract user's work situation and let tha extracted information be used for supporting better collaboration over the distance. Here the visual information surrounding the user is captured by a video camera and isw combined to the information related to the user's most recent manipuration of a computer.View full abstractDownload PDF (1051K) -
Masatoshi Arikawa, Michihiro Murao, Koji OkamuraArticle type: Article
Session ID: NIM99-64
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper proposes a framework of spatial hypermedia for a networked live video which is generated by a remote controllable camera. We also explain our prototype system, "Name-it, " based on thisframework. Labels annotating objects in a video are key components of the spatial hypermedia. Even if the condition of the camera such as pan, tilt and zoom is changed, labels are placed at appropriate positions in the current video. Furthermore, a label is used as a tag of hypermedia for making the video show the object annotated by its tag by means of changing The camera's condition. We introduce a function of integrating multiple devices to solve the problem on asynchronized syntesizing labels and video due to networked delay.View full abstractDownload PDF (1112K) -
Toshihiro Masaki, Tetsuya Yamaguchi, Hidetoshi Furuhashi, Toyoki Yamau ...Article type: Article
Session ID: NIM99-65
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes an interactive manipulation technique for objects extracted from video images by an efficient algorithm in order to produce multimedia contents. An object contained in a video image must be able to be extracted at a reasonable speed and a moving object able to be tracked with sufficient accuracy. Moreover, real object interactions that meet such criteria must be established using techniques for manipulating objects in virtual worlds. The proposed technique has potential to generate novel multimedia contents without using shape modeling. An interactive digital fishtank is described as one example application of the proposed technique. In this application, the user is able to obtain various video sequences of fishtanks from the original video sequence.View full abstractDownload PDF (1231K) -
Article type: Appendix
Pages App1-
Published: February 22, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (76K)
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