In this paper we present a technique for rendering and simulating liquid foams in real time using GPUs [11, 12]. The goal is to have bubbles meeting physical properties when interacting with each other and with other ...
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ISBN:
(纸本)3898380580
In this paper we present a technique for rendering and simulating liquid foams in real time using GPUs [11, 12]. The goal is to have bubbles meeting physical properties when interacting with each other and with other geometric objects such as planes and further giving a realistic geometric appearance, showing the detailed facet of intersecting bubbles. We achieve this using two rendering stages. In the first step, the bubble interactions are simulated, simultaneously computing the cutting planes of all intersecting pairs of bubbles. Then the spheres are rendered using CG shaders. A vertex shader is fed with the intersection informations and displaces the sphere vertices onto the cutting planes. A pixel shader computes lighting using Fresnel term.
In this paper we present the blue-c application programming interface, a software toolkit for media-rich, collaborative, immersive virtual reality applications. The blue-c API provides easy to use interfaces to all bl...
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ISBN:
(纸本)1581138849
In this paper we present the blue-c application programming interface, a software toolkit for media-rich, collaborative, immersive virtual reality applications. The blue-c API provides easy to use interfaces to all blue-c technology, including immersive projection, live 3D video acquisition and streaming, audio, tracking, and gesture recognition. The integration of multimedia data, including 2D video, 3D video, and animation, into the scene graph is presented. We emphasize on our performance-optimized 3D video handling and rendering pipeline, which is capable of rendering 3D video inlays consisting of up to 30,000 fragments updated at 10 Hz in real-time, enabling remote users to meet inside our virtual environment.
For rendering purposes trimmed NURBS surfaces have to be converted into a polygonal representation. In order to fulfill the high quality visualization demands posed by various design and quality control applications, ...
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ISBN:
(纸本)3898380580
For rendering purposes trimmed NURBS surfaces have to be converted into a polygonal representation. In order to fulfill the high quality visualization demands posed by various design and quality control applications, current NURBS rendering methods require a careful preparation of the converted models which often needs manual user intervention. This preprocessing step prevents the user from interactively modifying, removing or adding surfaces during a visualization session. In this paper we present a high quality, out-ofcore trimmed NURBS rendering algorithm that supports both an automatic preprocessing of gigabyte sized models and a real-time rendering of the preprocessed models allowing for the seamless integration of interactive editing of the NURBS surfaces. Additional advantages of our method are the conservative error bounds both for the geometry and the shading, making it suitable even for quality control applications.
In this paper we introduce and describe a novel generic and semiconductor-technology independent hardware development environment for a class of statistical signal- and image processing models. The statistical signal-...
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In this paper we introduce and describe a novel generic and semiconductor-technology independent hardware development environment for a class of statistical signal- and image processing models. The statistical signal- and image processing approach under consideration formally adopts the Bayesian paradigm and uses discrete Markov Random Field (MRF) methods for the processing models to derive the joint distribution of signal- and image-processing problems by means of mathematically and computationally tractable conditional distributions. We experimentally demonstrate and prove the capabilities respectively the concepts of the proposed novel high-level design environment by detailed chip-layouts of different neighbourhood topologies and a single processing element of a MRF- architecture, which solves the image processing problem of noise removing, restoration and intensity-level preserving.
A very promising strain engineering technique for enhancing the performance of p-channel transistors employs silicon-germanium (Si 1-yGey) source and drain Stressors. To further exploit this method of strain engineeri...
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Parallel coupled-line bandpass filters using the ground aperture technique is analyzed in this paper. A design guide for this kind of coupled-line bandpass filters on commonly used both high and low permittivity subst...
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ISBN:
(纸本)1580539920
Parallel coupled-line bandpass filters using the ground aperture technique is analyzed in this paper. A design guide for this kind of coupled-line bandpass filters on commonly used both high and low permittivity substrates is presented Based on the proposed design curves, two sample bandpass filter configurations are designed. The design is simulated by Ansoft HFSS and validated by the measurement. Good agreement between simulated and measured responses is obtained.
In this paper, a novel planar Marchand balun using a patterned ground plane is presented. In this new design, with the ground plane under the coupled Unes removed, the even-mode capacitance will be decreased substanti...
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ISBN:
(纸本)1580539920
In this paper, a novel planar Marchand balun using a patterned ground plane is presented. In this new design, with the ground plane under the coupled Unes removed, the even-mode capacitance will be decreased substantially. Meanwhile, two additional separated rectangular conductors are placed under the coupled lines to act as two capacitors so that the odd-mode capacitance is increased. As such, a well-matched Marchand balun on a double-sided PCB is achieved. The proposed new design was simulated and validated by the measurement.
Rendering geometric models with complex surface materials in arbitrary lighting environments is a challenging problem. In order to relight and render geometries covered with complex, measured BTFs two problems have to...
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Rendering geometric models with complex surface materials in arbitrary lighting environments is a challenging problem. In order to relight and render geometries covered with complex, measured BTFs two problems have to be addressed: the memory problem resulting from the large size of the measured BTF data and the light integration problem resulting from summing up the contributions from all measured light-sources. In this paper we describe how highly efficient BTF compression methods like local-PCA and suitable representations of environmental light based on spherical harmonics can be combined leading to fast environmental lighting for efficiently encoded BTFs. As a side effect the method supports precomputed radiance transfer
In this paper, we propose a new method that can consistently orient all normals of any mesh (if at all possible), while ensuring that most polygons are seen with their front-faces from most viewpoints. Our algorithm c...
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In this paper, we propose a new method that can consistently orient all normals of any mesh (if at all possible), while ensuring that most polygons are seen with their front-faces from most viewpoints. Our algorithm combines the proximity-based with a new visibility-based approach. Thus, it virtually eliminates the problems of proximity-based approaches, while avoiding the limitations of previous solid-based approaches. Our new method builds a connectivity graph of the patches of the model, which encodes the "proximity" of neighboring patches. In addition, it augments this graph with two visibility coefficients for each patch. Based on this graph, a global consistent orientation of all patches is quickly found by a greedy optimization. We have tested our new method with a large suite of models, many of which from the automotive industry. The results show that almost all models can be oriented consistently and sensibly using our new algorithm
This paper presents a novel calibration method for data-gloves with many degrees of freedom. The goal of our method is to establish a mapping from the sensor values of the glove to the joint angles of an articulated h...
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This paper presents a novel calibration method for data-gloves with many degrees of freedom. The goal of our method is to establish a mapping from the sensor values of the glove to the joint angles of an articulated hand that is of 'high visual' fidelity. This is in contrast to previous methods that aim at determining the absolute values of the real joint angles with high accuracy. The advantage of our method is that it can be simply carried through without the need for auxiliary calibration hardware (such as cameras), while still producing visually correct mappings. To achieve this, we developed a method that explicitly models the cross-couplings of the abduction sensors with the neighboring flex sensors. The results show that our method performs superior to linear calibration in most cases
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