{"title":"An HDM interpreter for on-line tutorials","authors":"Mario Alessandro Bochicchio, P. Paolini","doi":"10.1109/MULMM.1998.723000","DOIUrl":"https://doi.org/10.1109/MULMM.1998.723000","url":null,"abstract":"The use of WWW for training purposes is rapidly growing; in a sense it could be said that training is one of the most important applications for Internet technology, in general and for WWW in particular. The overall organization of the sites, is, however, a difficult task, mostly if a standard structure must be enforced across different sets of content. In addition it is of growing interest the need for a compatibility between off-line training (e.g. CD-ROMS) and on-line training (e.g. WWW sites). A real life experience is described: a set of complex tutorials, for an industrial consortium, had to be delivered both off-line and on-line. At design time, the content was only partially known. It was important also to be able to add new material and to modify access structure, without reprogramming. The solution has been a flexible design schema (through the model HDM) and an advanced set of tools (based on Java), that allow the cost-effective development of advanced multimedia training material.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128558169","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}
{"title":"Interaction with a projection screen using a camera-tracked laser pointer","authors":"Carsten Kirstein, Heinrich Müller","doi":"10.1109/MULMM.1998.723001","DOIUrl":"https://doi.org/10.1109/MULMM.1998.723001","url":null,"abstract":"A system for direct interaction with a video projection screen using a laser pointer is presented. The laser point on the screen is captured by a video camera, and its location recognized by image processing techniques. The behavior of the point is translated into signals sent to the mouse input of the computer causing the same reactions as if they came from the mouse. More complex interaction paradigms are composed from the elementary operations \"switch on/off\" and pointing of the laser pen.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126238157","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}
Celso A. S. Santos, J. Courtiat, L. Soares, Guido L. De Souza
{"title":"Formal specification and verification of hypermedia documents based on the Nested Context Model","authors":"Celso A. S. Santos, J. Courtiat, L. Soares, Guido L. De Souza","doi":"10.1109/MULMM.1998.722970","DOIUrl":"https://doi.org/10.1109/MULMM.1998.722970","url":null,"abstract":"The paper presents a methodology by which documents authored with the Nested Context Model (NCM) are automatically translated into a RT-LOTOS specification. The latter is then checked against intrinsic and extrinsic consistencies using standard RT-LOTOS reachability analysis.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115959813","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}
{"title":"Object assignment strategy for distributed multimedia systems","authors":"Wen-Tsung Chang, Chien-Chiung Hsieh","doi":"10.1109/MULMM.1998.722983","DOIUrl":"https://doi.org/10.1109/MULMM.1998.722983","url":null,"abstract":"As applications of multimedia and networking have become popular in recent years, many techniques have been proposed to create fascinating works, but little of them have focused on assigning tasks effectively in a distributed manner. We propose an efficient dynamic multimedia object assignment strategy that optimizes both the routing overhead and the cost of method lookup. Moreover, the strategy can also be adjusted according to the performance indices of systems with different implementations. Simulation results show that our strategy is more effective than other conventional strategies.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134389217","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}
{"title":"Comic Actors representing software agents","authors":"Knut Manske, Rimbert Rudisch","doi":"10.1109/MULMM.1998.723007","DOIUrl":"https://doi.org/10.1109/MULMM.1998.723007","url":null,"abstract":"A growing amount of tasks are expected to be delegated to software agents by human users. Such agents carry personal data of the user and act on his behalf. If mobile software agents leave the users' host, the users are left with an uncomfortable lack of knowledge about and control over \"what's going on\". The authors believe that an important remedy for this lies in sophisticated visualization of the activities and status of software agents. The paper describes the use of Comic Actors for the visualization of software agents and their activities. A virtual advertising agency is used as an example.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"281 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122268997","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}
I. Pandzic, T. Çapin, Elwin Lee, N. Magnenat-Thalmann, D. Thalmann
{"title":"Autonomous actors in networked collaborative virtual environments","authors":"I. Pandzic, T. Çapin, Elwin Lee, N. Magnenat-Thalmann, D. Thalmann","doi":"10.1109/MULMM.1998.722991","DOIUrl":"https://doi.org/10.1109/MULMM.1998.722991","url":null,"abstract":"Introducing seemingly autonomous virtual beings into virtual environments to co-habit and collaborate with us is a continuous challenge and source of interest. Latest proof of human excitement for virtual life is the current worldwide craze for electronic pets that must be fed and cared for lest they develop a bad character or die. Even more interesting is the inclusion of autonomous actors in networked collaborative virtual environments (NCVEs). They provide a meeting place for people from different geographical locations and virtual beings. In NCVEs one doesn't see correspondents, only their graphical representations in the virtual world, which is the same as for the virtual ones-therefore the communication with virtual beings can come naturally. There is no single solution to the simulation of autonomous behavior. This is an ongoing research topic. Therefore it is interesting to provide an open NCVE system for easy interfacing with various implementations of autonomous behavior. In this way, the system can serve as an application platform with existing algorithms, as well as a research testbed for new autonomous behavior algorithms. The paper studies the requirements for such an open interface and, based on this study, presents an implementation within the Virtual Life Network (VLNET) system. Results are presented in terms of two case studies. A simple one implementing a dumb servant character and a more complex one connecting VLNET with the autonomous agent program Eliza (Weizenbaum, 1966).","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116274900","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}
{"title":"Computer generated still images composited with panned landscape video sequences","authors":"E. Nakamae, Xueying Qin, Guofang Jiao, Przemyslaw Rokita, Katsumi Tadamura, Yuji Usagawa","doi":"10.1109/MULMM.1998.722977","DOIUrl":"https://doi.org/10.1109/MULMM.1998.722977","url":null,"abstract":"We present a novel approach to offer at a reasonable cost, panned landscape video sequence images well matched with photorealistic computer generated still images of large scale construction projects, such as bridges and electric power transmission towers. Our newly developed compositing algorithms can be used with the equipment which consists of a regular camcorder sold on the market, a video editing system, and our own software for rendering day-time scenes under various weather conditions. Other types of equipment such as an elaborate camera controller or special reference points in the landscapes, are unnecessary. The proposed algorithms provide the following features: (1) the computer generated still images are well harmonized with panned video sequence images at any time of day under various weather conditions, in terms of both optical and geometrical accuracy; (2) a precise panorama composited from video sequence images is created, in which varying exposure levels due to changing camera view fields can be coped with and any geometrical distortion is eliminated.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131919643","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}
{"title":"A virtual reality learning environment providing access to digital museums","authors":"N. Kladias, T. Pantazidis, Manolis Avagianos","doi":"10.1109/MULMM.1998.723002","DOIUrl":"https://doi.org/10.1109/MULMM.1998.723002","url":null,"abstract":"VR-LEARNERS (Virtual Learning Environment for Network of Advanced Multimedia Resource Centers, Museums and Schools) is a European project that aims at developing an educational application based on collaborative virtual environment (CVE) technology and providing access to digital exhibits of European museums. The project was initiated in January 1998 and the paper presents an overview of the project objectives, the technical approach, findings of the user requirement research activity as well as the design specification approach.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128218344","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}
Yasuo Nagai, Isao Tonozuka, E. Nakamae, Katsumi Tadamura
{"title":"Simple algorithms for rational time speed playback of a standard video sequence","authors":"Yasuo Nagai, Isao Tonozuka, E. Nakamae, Katsumi Tadamura","doi":"10.1109/MULMM.1998.722976","DOIUrl":"https://doi.org/10.1109/MULMM.1998.722976","url":null,"abstract":"We present very simple but effective algorithms to playback a standard video tape recording at a higher/slower rational time speed in accordance with varying demand. To avoid temporal signal sampling errors for a slow speed playback and spatial ones for a high speed one, the following four-step algorithms have been developed: (1) sequences are separated into even and odd fields, and intermediate noninterlaced frames are made by vertical interpolation; (2) for slowing down the playback speed of video sequences, linear interpolation between two frames surrounding a fractional frame position is used; (3) for speeding up, an average frame in a window surrounding the desired frame (with the window size depending on the speed up factor) is used; (4) sequences are post processed by decimation to get back interlaced images. The proposed algorithms give quite smooth sequence images for slow speed sequences and nondiscontinuous and less jittering ones with appropriate motion blur for high speed ones.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131089944","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}
{"title":"WWW fisheye-view graphical browser","authors":"D. Muchaluat-Saade, R. Rodrigues, L. Soares","doi":"10.1109/MULMM.1998.722979","DOIUrl":"https://doi.org/10.1109/MULMM.1998.722979","url":null,"abstract":"The paper proposes a visualization tool for the structure of World-Wide Web documents using fisheye-view techniques. Besides helping user navigation, this graphical browser may play an important role in Web information searching. In order to build structural views more efficiently, a set of rules for Web-site authoring, based on nested composition concepts, are proposed to help logically organizing documents.","PeriodicalId":305422,"journal":{"name":"Proceedings 1998 MultiMedia Modeling. MMM'98 (Cat. No.98EX200)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133338001","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}