This paper describes the development of the Compuler-Visualistik-Raum (CVR), a Virtual Reality experience presented in the Exhibition "Otto the Great, Magdeburg and Europe" which took place in 2001 in the Mu...
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ISBN:
(纸本)1581134479
This paper describes the development of the Compuler-Visualistik-Raum (CVR), a Virtual Reality experience presented in the Exhibition "Otto the Great, Magdeburg and Europe" which took place in 2001 in the Museum of Cultural History, Magdeburg. The presentation deals with an archaeological excavation that was carried out at the Domplatz in Magdeburg in the 1960s. In the CVR, which consists of three consecutive rooms with a spherical projection chamber in its center, visitors can explore several variants of interpretations of the excavation findings. The virtual reconstruction shown in the CVR is special in two ways. First, it tries to be truthful to the actual findings by visually stating the degree of certainty of details, where conventional systems only give textual or aural indications of these circumstances. This is achieved by employing non-photorealistic real-time rendering techniques, as well as by presenting alternatives instead of just one reconstruction. Second, the whole system is based on rather inexpensive components (compared to specialized VR systems), that nevertheless allow a great deal of freedom in expression. A game engine provides distributed realtime-rendering capabilities to drive three standard PCs with GeForce3 graphics boards. Their rendering capacity is sufficient to even perform the spherical distortion and soft-edge blending without special hardware, allowing off-the-shelf beamers to be used.
techniques to auto-generate professional background music for the home-made video become highly demanded recently with the prevalence of digital video recorders and social media communities. An automated system far su...
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ISBN:
(纸本)9781450304603
techniques to auto-generate professional background music for the home-made video become highly demanded recently with the prevalence of digital video recorders and social media communities. An automated system far such purpose can significantly relieve users' burden of editing background music to accompany home-made video. However, the major obstacle lies in the fact that the assessment of the video-audio matching quality itself is always subjective. We therefore seek solutions from the rich online sharing professional videos to alleviate this difficulty. Mote specifically, a learning-from-Internet framework is proposed to uncover the underlying structures and rules of the video and audio track association patterns from professional online videos. After collecting a large corpus of online professional videos, a joint probabilistic framework is proposed to model prior knowledge from two aspects, namely, the correlation between video and audio tracks, as well as the transition mode from speech and music components. For novel pure-video input, candidate background music tracks are first selected according to the learnt joint probability model, which are further integrated into a smoothed matching sequence via dynamic programming. Qualitative experiments and comprehensive user studies well demonstrate the effectiveness of the proposed framework for background music auto-generation. Copyright 2010 acm.
proceedings include 27 papers dealing with application of computerinteractivegraphics design/manufacturing systems (CAD/CAM) to wide variety of industrial, scientific and educational areas. Topics covered are comput...
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proceedings include 27 papers dealing with application of computerinteractivegraphics design/manufacturing systems (CAD/CAM) to wide variety of industrial, scientific and educational areas. Topics covered are computer aided metal cutting, design of mechanical systems (automobiles, gas turbines, helicopters), integrated circuit design, printed circuit board layout and wiring - interconnections, geometric modeling, three-dimensional imaging techniques of display devices, and educational programs, in computer aided design and manufacture. All papers are indexed separately.
We present a new technique to automatically generate building exteriors. Our technique relies on the definition of building templates that will be applied on building descriptions. The building descriptions require th...
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ISBN:
(纸本)1595935649
We present a new technique to automatically generate building exteriors. Our technique relies on the definition of building templates that will be applied on building descriptions. The building descriptions require the building 3D footprints and their heights and roof heights. This information can be stored within a Geographic Information System (GIS). Most of the time, graphic designers use the texture repetition method in order to create building frontages. Due to this lack of flexibility, this method often disappoints the users who expect more realism. In this paper, we focus on the description of our frontage generation method. Building frontages are generated using a 2.5D wall grammar based on a set of rules that can be simple or detailed enough to fulfil the users wishes. Our method is as easy to use as the texture repetition but provides a higher level of realism and diversity in the resulting buildings.
Impact between polygonal meshes is ubiquitous in any animated graphical system and the results of this impact need to be visualised if realism is to be maintained. Mesh destruction and deformation can be computational...
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Impact between polygonal meshes is ubiquitous in any animated graphical system and the results of this impact need to be visualised if realism is to be maintained. Mesh destruction and deformation can be computationally expensive to perform on arbitrary meshes, and are therefore not suited to real-time, interactive requirements. We present a system for modelling small-scale debris generated by the collision of arbitrary polygonal meshes, based on hierarchical particle systems. The technique automatically generates debris characteristics by sampling the mesh and texture parameters at the point of impact. We sacrifice physical realism to achieve interactive performance rates, focussing instead on visual realism based on empirical measurement. We present promising results, at little computational cost, making the technique useful as a compliment to mesh destruction techniques or as a stand-alone debris system for real-time applications where physical accuracy is not paramount
Location-based services, which can be applied in navigation systems, are a key application in mobile and ubiquitous computing. Combined with indoor localization techniques, pico projectors can be used for navigation p...
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ISBN:
(纸本)9781450318150
Location-based services, which can be applied in navigation systems, are a key application in mobile and ubiquitous computing. Combined with indoor localization techniques, pico projectors can be used for navigation purposes to augment the environment with navigation information. In the present empirical study (n = 24) we explore users' perceptions, workload and navigation performance when navigating with a mobile projector in comparison to a mobile screen as indoor navigation interface. To capture user perceptions and to predict acceptance by applying structural equation modeling, we assessed perceived disorientation, privacy concerns, trust, ease of use, usefulness and sources of visibility problems. Moreover, the impact of user factors (spatial abilities, technical selfefficacy, familiarity) on acceptance was analyzed. The structural models exhibited adequate predictive and psychometric properties. Based on real user experience, they clearly pointed out a) similarities and device-specific differences in navigation device acceptance, b) the role of specific user experiences (visibility, trust, and disorientation) during navigation device usage and c) illuminated the underlying relationships between determinants of user acceptance. Practical implications of the results and future research questions are provided. Copyright 2012 acm.
Colleges and universities are not meeting industry needs for graduates trained in the use or implementation of computer-aided design and manufacturing systems since few schools have experience in teaching CAD/CAM. Fur...
ISBN:
(纸本)9780897910767
Colleges and universities are not meeting industry needs for graduates trained in the use or implementation of computer-aided design and manufacturing systems since few schools have experience in teaching CAD/CAM. Furthermore, many Bachelor's-level graduates are going directly into industry, rather than pursuing graduate degrees, thereby compounding this problem. Members of this panel represent both schools and industry and together attempt to outline approaches to developing more extensive CAD/CAM emphasis in education, including- the role colleges and universities can or should play in addressing industry needs in this area- user- and implementor-oriented CAD/CAM education- CAD/CAM education as an integral part of university engineering curricula- problems encountered in organizing and implementing CAD/CAM curriculum- universities' relationships with *** is our hope that panelists' experiences will help guide schools in structuring CAD/CAM programs to best insure that the United States remain at the forefront of technology and compete industrially *** PuhlVictor LangerDonald P. GreenbergMark S. ShepardHerb VoelckerUniversities' Relationships With IndustryFrank PuhlAmerican industry needs engineers who have been brought up with the realization that computers are intimately involved in all aspects of design, analysis, and manufacturing. Industry, of course, needs engineers who are already trained in fundamental CAD/CAM principles and in solving real world problems using computers, as well as those who have been taught to be productivity- and *** help meet these needs, we must now provide answers to several significant questions:What part should industry play in encouraging and sponsoring research and education in CAD/CAM?How can we resolve conflicts between industries' “trade secrets” and universities' “open research”?How can industry and educational institutions work together to increase U.S. productivity so as to regain our compe
To provide student experience at the detail level of graphics output, a simulated graphics display processor was written in FORTRAN to run on a CDC 6400 computer equipped with microfilm graphics output. The simulated ...
ISBN:
(纸本)9781450373548
To provide student experience at the detail level of graphics output, a simulated graphics display processor was written in FORTRAN to run on a CDC 6400 computer equipped with microfilm graphics output. The simulated processor has a command set conforming to the course textbook, a memory of 4096 16-bit words and accepts directions only in absolute octal code. This last feature caused the class to write an octal code generator which accepts graphic primatives as commands.
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