The Mediazine is a distributed interactive multimedia magazine for the Internet including text, applications, images, live audio, live-video, animations, 3D comp.ter graphics. Users and Actors can interactively meet e...
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ISBN:
(纸本)1581133030
The Mediazine is a distributed interactive multimedia magazine for the Internet including text, applications, images, live audio, live-video, animations, 3D comp.ter graphics. Users and Actors can interactively meet each other in a shared virtual environment that is distributed via comp.ter network. The system uses high quality multimedia streams. For the playback of audio an own developed Spatial Audio Server is used. On one hand it provides output for the communication system, an Internet-Telephone. On the other hand it manages sound of applications like TV and radio. Additionally spatialized binaural output is provided for the sound: In the virtual environment participants speech the can be located from where their avatars are placed. The participant'S sound is coming from the place where the video is presented. The paper describes how the system is built. It focuses on the mechanism of controlling the amount and quality of multimedia information on behalf of the network and the receiver system. Furthermore, the paper discusses how agents can be integrated as comp.nents in the system that is organized as an object-oriented application framework. Authors can take advantage of this concept specifying the agent'S behavior efficiently in a target domain specific way. Finally, a prototype implementation of the mediazine system is presented.
Digital Reconstruction Radiography (DRR) is an important technique in radiotherapy imaging applications. DRR volume rendering aims at rendering DRR images using CT or other tomographic data sets. In addition to the ap...
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Digital Reconstruction Radiography (DRR) is an important technique in radiotherapy imaging applications. DRR volume rendering aims at rendering DRR images using CT or other tomographic data sets. In addition to the appropriate optical model, the interactive and realistic DRR imaging depends mainly on an accurate attenuation coefficient transfer function, which is usually a piecewise function, and an interactive rendering algorithm with reasonable rendering quality. In this paper, we first present a realistic DRR transfer function based on the mass attenuation coefficient comp.sition. Then, we introduce an object space DRR rendering algorithm, DRR splatting in the sheared object space. The DRR image qualities under different rendering algorithms are comp.red, including ray casting, Fourier volume rendering, projective shear-warp and splatting shear-warp. Finally, a line encoding technique is adopting to accelerate DRR rendering.
In this article, we describe a multi-layered architecture for sketch-based interaction within virtual environments. Our architecture consists of eight hierarchically arranged layers that are described by giving exampl...
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In this article, we describe a multi-layered architecture for sketch-based interaction within virtual environments. Our architecture consists of eight hierarchically arranged layers that are described by giving examples of how they are implemented and how they interact. Focusing on table-like projection systems (such as Virtual Tables or Responsive Workbenches) as human-centered output-devices, we show examples of how to integrate parts or all of the architecture into existing domain-specific applications - rather than realizing new general sketch applications - to make sketching an integral part of the next-generation human-comp.ter interface.
A fast data association algorithm based on the attribute intensity of space intersection for the static association problem is presented in this paper. All of sensors are passive sensors, which obtained the angle only...
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A fast data association algorithm based on the attribute intensity of space intersection for the static association problem is presented in this paper. All of sensors are passive sensors, which obtained the angle only, in presence of clutter, missed detection, false alarm, and an unknown number and location of targets. comp.rison of our method to the classical algorithm demonstrates that our algorithm is superior to the classical approach in terms of comp.tational comp.exity and association accuracy via several simulations.
Besides entertainment, three main areas of application attract industrial interest in virtual environment (VE): marketing, prototyping, and training. Advanced VEs derived from available CAD data or simulation results ...
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Besides entertainment, three main areas of application attract industrial interest in virtual environment (VE): marketing, prototyping, and training. Advanced VEs derived from available CAD data or simulation results still require efficient tools for data preparation, as well as high-end workstations and peripherals. The high costs for these advanced VEs prevent small and medium comp.nies from taking the first steps in this direction.
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