检索结果-内蒙古大学图书馆

Spatio-temporal geometry fusion for multiple hybrid cameras using moving least squares surfaces

COMPUTER GRAPHICS FORUM 2014年第2期33卷 1-10页

作者： Kuster, Claudia Bazin, Jean-Charles Oztireli, Cengiz Deng, Teng Martin, Tobias Popa, Tiberiu Gross, Markus Swiss Fed Inst Technol Zurich Switzerland NTU Singapore Singapore Singapore Concordia Univ Montreal PQ Canada

Multi-view reconstruction aims at computing the geometry of a scene observed by a set of cameras. Accurate 3D reconstruction of dynamic scenes is a key component for a large variety of applications, ranging from special effects to telepresence and medical imaging. In this paper we propose a method based on Moving Least Squares surfaces which robustly and efficiently reconstructs dynamic scenes captured by a calibrated set of hybrid color+depth cameras. Our reconstruction provides spatio-temporal consistency and seamlessly fuses color and geometric information. We illustrate our approach on a variety of real sequences and demonstrate that it favorably compares to state-of-the-art methods.

关键词： Categories and Subject Descriptors (according to ACM CCS) I.3.3 [Computer Graphics] Three-Dimensional Graphics and Realism&mdash display algorithms

来源：评论

学校读者我要写书评

暂无评论

Anaglyph Caustics with Motion Parallax

引用

COMPUTER GRAPHICS FORUM 2016年第7期35卷 343-352页

作者： Lancelle, M. Martin, T. Solenthaler, B. Gross, M. Swiss Fed Inst Technol Dept Comp Sci Zurich Switzerland Disney Res Zurich Zurich Switzerland

In this paper we present a method to model and simulate a lens such that its caustic reveals a stereoscopic 3D image when viewed through anaglyph glasses. By interpreting lens dispersion as stereoscopic disparity, our method optimizes the shape and arrangement of prisms constituting the lens, such that the resulting anaglyph caustic corresponds to a given input image defined by intensities and disparities. In addition, a slight change of the lens' distance to the screen causes a 3D parallax effect that can also be perceived without glasses. Our proposed relaxation method carefully balances the resulting pixel intensity and disparity error, while taking the subsequent physical fabrication process into account. We demonstrate our method on a representative set of input images and evaluate the anaglyph caustics using multi-spectral photon tracing. We further show the fabrication of prototype lenses with a laser cutter as a proof of concept.

关键词： Categories and Subject Descriptors (according to ACM CCS) I.3.3 [Computer Graphics]: Three-Dimensional Graphics and Realism&mdash display algorithms

来源：评论

学校读者我要写书评

暂无评论

Optimizing BRDF orientations for the manipulation of anisotropic highlights

引用

COMPUTER GRAPHICS FORUM 2014年第2期33卷 313-321页

作者： Raymond, Boris Guennebaud, Gael Barla, Pascal Pacanowski, Romain Granier, Xavier Bordeaux Univ Inria IOGS CNRS Bordeaux France

This paper introduces a system for the direct editing of highlights produced by anisotropic BRDFs, which we call anisotropic highlights. We first provide a comprehensive analysis of the link between the direction of anisotropy and the shape of highlight curves for arbitrary object surfaces. The gained insights provide the required ingredients to infer BRDF orientations from a prescribed highlight tangent field. This amounts to a non-linear optimization problem, which is solved at interactive framerates during manipulation. Taking inspiration from sculpting software, we provide tools that give the impression of manipulating highlight curves while actually modifying their tangents. Our solver produces desired highlight shapes for a host of lighting environments and anisotropic BRDFs.

关键词： Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Picture/Image Generation&mdash display algorithms I.3.4 [Computer Graphics]: Graphics Utilities&mdash Paint systems

来源：评论

学校读者我要写书评

暂无评论

A simple normal enhancement technique for interactive non-photorealistic renderings

引用

COMPUTERS & GRAPHICS-UK 2005年第1期29卷 125-133页

作者： Cignoni, P Scopigno, R Tarini, M CNR Ist Sci & Tecnol Informaz I-56124 Pisa Italy

We present a simple technique to improve the perception of an object's shape. Bump mapping is well known in the computer graphics community for providing the impression of small-scale geometrical features, which are not explicitly modelled. Here, we propose a similar approach (variation of normals) for the purpose of enhancing the perception of a given geometry. Our approach is based on a simple modification of the surface hormals in order to enhance the geometric features of the object during the rendering. The enhanced normals produced by this approach can be used in any rendering technique. The technique presented is particularly well suited to improve the rendering of mechanical parts where common straightforward shading techniques can often generate shading ambiguities. (c) 2004 Elsevier Ltd. All rights reserved.

关键词： display algorithms non-photorealistic rendering (NPR) computer-aided design (CAD)

来源：评论

学校读者我要写书评

暂无评论

Four new efficient logical display techniques of electricity distribution networks

引用

JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS 2007年第3期16卷 437-454页

作者： Al-A'Ali, Mansoor Univ Bahrain Dept Comp Sci Isa Town Bahrain

Tracing a schematic display of an electricity distribution network is a cumbersome task and does not empower the engineer to take fast decisions to control the dynamic network because of the difficulty in reading the displayed circuits. This paper presents four different new approaches, which achieve an intelligent logical dynamically derived network connections and display for Electrical Distribution Networks. The four approaches were designed and implemented using the Object Oriented approach and programmed using Delphi graphics components. The system developed is dynamically interactive and allows switching operations as well as displays. This paper focuses on the display issues only. The logical display approaches presented in this paper eliminate the well-known difficulties of adding and retiring stations which are awkward operations in the schematic display. The four new approaches are compared in terms of speed, readability and space utilization. To our knowledge there is no similar work done previously.

关键词： electricity distribution network distribution control center schematic display logical display display algorithms

来源：评论

学校读者我要写书评

暂无评论

A parallel coordinates style interface for exploratory volume visualization

引用

IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2005年第1期11卷 71-80页

作者： Tory, M Potts, S Möller, T Univ British Columbia Dept Comp Sci Vancouver BC V6T 1Z4 Canada Simon Fraser Univ GrUVi Lab Dept Comp Sci Burnaby BC V5A 1S6 Canada

We present a user interface, based on parallel coordinates, that facilitates exploration of volume data. By explicitly representing the visualization parameter space, the interface provides an overview of rendering options and enables users to easily explore different parameters. Rendered images are stored in an integrated history bar that facilitates backtracking to previous visualization options. Initial usability testing showed clear agreement between users and experts of various backgrounds ( usability, graphic design, volume visualization, and medical physics) that the proposed user interface is a valuable data exploration tool.

关键词： graphical user interfaces (GUI) screen design display algorithms medical imaging

来源：评论

学校读者我要写书评

暂无评论

Evaluation of Attention-Guiding Video Visualization

引用

COMPUTER GRAPHICS FORUM 2013年第3期32卷 51-60页

作者： Kurzhals, K. Hoeferlin, M. Weiskopf, D. Univ Stuttgart Visualizat Res Ctr VISUS Stuttgart Germany

We investigate four different variants of attention-guiding video visualization techniques that aim to help users distribute their attention equally among potential objects of interest: bounding box visualization, force-directed visualization, top-down visualization, grid visualization. Objects of interest are highlighted by rectangular shapes and then we concentrate on the manipulation of color, motion, and size. We conducted a controlled laboratory user study (n=25) to compare the four visualization techniques and the unmodified video material as baseline. We evaluated task performance and distribution of attention in a search task. These two properties become especially important when video material with numerous objects has to be observed. The distribution of attention was measured by eye tracking. Our results show that a more even distribution of attention between the objects can be achieved by attention-guiding visualization, compared to unmodified video. Many participants feel more comfortable when they look at bounding boxes and the grid, but improvements in search task performance could not be confirmed. Categories and Subject Descriptors (according to ACM CCS): H. 5.1 [Information Interfaces and Presentation]: Multimedia Information Systems- Evaluation/methodology;I. 3. m [Computer Graphics]: Miscellaneous- Video visualization;I. 3.3 [Computer Graphics]: Picture/Image Generation- display algorithms

关键词： H.5.1 [Information Interfaces and Presentation]: Multimedia Information Systems Evaluation/methodology I.3.m[ComputerGraphics]:Miscellaneous Video visualization I.3.3 [Computer Graphics]: Picture/Image Generation display algorithms

来源：评论

学校读者我要写书评

暂无评论

Procedural Texture Synthesis for Zoom-Independent Visualization of Multivariate Data

引用

COMPUTER GRAPHICS FORUM 2012年第3期31卷 1355-1364页

作者： Khlebnikov, R. Kainz, B. Steinberger, M. Streit, M. Schmalstieg, D. Graz Univ Technol Inst Comp Graph & Vis A-8010 Graz Austria Johannes Kepler Univ Linz Inst Comp Graph Linz Austria

Simultaneous visualization of multiple continuous data attributes in a single visualization is a task that is important for many application areas. Unsurprisingly, many methods have been proposed to solve this task. However, the behavior of such methods during the exploration stage, when the user tries to understand the data with panning and zooming, has not been given much attention. In this paper, we propose a method that uses procedural texture synthesis to create zoom-independent visualizations of three scalar data attributes. The method is based on random-phase Gabor noise, whose frequency is adapted for the visualization of the first data attribute. We ensure that the resulting texture frequency lies in the range that is perceived well by the human visual system at any zoom level. To enhance the perception of this attribute, we also apply a specially constructed transfer function that is based on statistical properties of the noise. Additionally, the transfer function is constructed in a way that it does not introduce any aliasing to the texture. We map the second attribute to the texture orientation. The third attribute is color coded and combined with the texture by modifying the value component of the HSV color model. The necessary contrast needed for texture and color perception was determined in a user study. In addition, we conducted a second user study that shows significant advantages of our method over current methods with similar goals. We believe that our method is an important step towards creating methods that not only succeed in visualizing multiple data attributes, but also adapt to the behavior of the user during the data exploration stage.

关键词： I.3.3 [Computer Graphics]: Picture/Image Generation display algorithms

来源：评论

学校读者我要写书评

暂无评论

Forward Light Cuts: A Scalable Approach to Real-Time Global Illumination

引用

COMPUTER GRAPHICS FORUM 2016年第4期35卷 79-88页

作者： Laurent, Gilles Delalandre, Cyril de La Riviere, Gregoire Boubekeur, Tamy Dassault Syst Velizy Villacoublay France Univ Paris Saclay Telecom ParisTech CNRS LTCI Paris France

We present Forward Light Cuts, a novel approach to real-time global illumination using forward rendering techniques. We focus on unshadowed diffuse interactions for the first indirect light bounce in the context of large models such as the complex scenes usually encountered in CAD application scenarios. Our approach efficiently generates and uses a multiscale radiance cache by exploiting the geometry-specific stages of the graphics pipeline, namely the tessellator unit and the geometry shader. To do so, we assimilate virtual point lights to the scene's triangles and design a stochastic decimation process chained with a partitioning strategy that accounts for both close-by strong light reflections, and distant regions from which numerous virtual point lights collectively contribute strongly to the end pixel. Our probabilistic solution is supported by a mathematical analysis and a number of experiments covering a wide range of application scenarios. As a result, our algorithm requires no precomputation of any kind, is compatible with dynamic view points, lighting condition, geometry and materials, and scales to tens of millions of polygons on current graphics hardware.

关键词： Categories and Subject Descriptors (according to ACM CCS) I.3.3 [Computer Graphics]: Picture/Image Generation&mdash display algorithms I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism&mdash Radiosity

来源：评论

学校读者我要写书评

暂无评论

GLSV: Graphics library stereo vision for OpenGL

引用

VIRTUAL REALITY 2009年第1期13卷 51-57页

作者： Martin, S. Suarez, J. Orea, R. Rubio, R. Gallego, R. Univ Oviedo Univ Sch Ind Tech Engn Res Grp I3G Oviedo Spain

This work proposes the development of an auxiliary library for use with OpenGL, to facilitate the creation of graphic applications incorporating stereoscopic representation. This library, christened graphics library stereo vision (GLSV), is designed to remove all calculations involving knowledge of stereo vision theory from the task performed by the programmer without the latter having to change the way he/she has been working with the OpenGL library. The GLSV is distributed under the terms of the GNU Library General Public License agreement.

关键词： Software libraries display algorithms Stereoscopic Virtual reality

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：