International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa最新文献_第10页

Developing applications for the Portuguese Shoe Industry 为葡萄牙鞋业开发应用程序

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2004-11-03 DOI: 10.1145/1029949.1029972

Sofia Gameiro, Luís Almeida, António Freitas, Pedro Pereira, A. Marcos

引用次数: 1

A local model of eye adaptation for high dynamic range images 高动态范围图像的局部眼适应模型

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2004-11-03 DOI: 10.1145/1029949.1029978

P. Ledda, Luís Paulo Santos, A. Chalmers

引用次数: 144

Sketchy drawings 粗略的图纸

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2004-11-03 DOI: 10.1145/1029949.1029963

M. Nienhaus, J. Döllner

{"title":"Sketchy drawings","authors":"M. Nienhaus, J. Döllner","doi":"10.1145/1029949.1029963","DOIUrl":"https://doi.org/10.1145/1029949.1029963","url":null,"abstract":"In non-photorealistic rendering sketchiness is essential to communicate visual ideas and can be used to illustrate drafts and concepts in, for instance, architecture and product design.\u0000 In this paper, we present a hardware-accelerated real-time rendering algorithm for drawings that sketches visually important edges as well as inner color patches of arbitrary 3D objects even beyond the geometrical boundary. The algorithm preserves edges and color patches as intermediate rendering results using textures. To achieve sketchiness it applies uncertainty values in image-space to perturb texture coordinates when accessing intermediate rendering results. The algorithm adjusts depth information derived from 3D objects to ensure visibility when composing sketchy drawings with arbitrary 3D scene contents. Rendering correct depth values while sketching edges and colors beyond the boundary of 3D objects is achieved by depth sprite rendering. Moreover, we maintain frame-to-frame coherence because consecutive uncertainty values have been determined by a Perlin noise function, so that they are correlated in image-space.\u0000 Finally, we introduce a solution to control and predetermine sketchiness by preserving geometrical properties of 3D objects in order to calculate associated uncertainty values. This method significantly reduces the inherent shower-door effect.","PeriodicalId":325699,"journal":{"name":"International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125728954","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}

引用次数: 18

Forward area light map projection 向前区域光地图投影

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602346

Elvis Ko-Yung Jeng, Zhigang Xiang

引用次数: 1

Improving readability of contextualized text explanations 提高语境化文本解释的可读性

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602357

W. Chigona, T. Strothotte

{"title":"Improving readability of contextualized text explanations","authors":"W. Chigona, T. Strothotte","doi":"10.1145/602330.602357","DOIUrl":"https://doi.org/10.1145/602330.602357","url":null,"abstract":"Dual-Use of Image Space (duis) is an interactive technique for presenting text corresponding to images within the image space. From a technical point of view, the pixels in the image space are used both as text which can be read as well as for shading. This approach raises a number of interesting new readability problems: First, in order to simulate shading, the weight and the width of the character glyphs are manipulated. We have noted that readers find reading text with weight and width variations not only difficult but also irritating. Second, the shape of the silhouettes of the objects, by their irregular nature, are not ideal for text layout.In this paper we present techniques for addressing the duis readability problems. The techniques are divided into three categories as follows: First, shading and reading functionalities have been separated by creating two text presentation modes, shading mode and reading mode. In reading mode, it is no longer necessary to vary the weight and width of the character glyphs. Second, we have introduced the concept of multiple column presentation to address the problems of interruptions in reading. Finally, distortions of the objects are also used to improve readability.","PeriodicalId":325699,"journal":{"name":"International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129948668","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}

引用次数: 5

Realistic autonomous fish for virtual reality 虚拟现实的逼真自主鱼

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602361

A. Lobb, S. Bangay

引用次数: 3

A visualization design repository for mobile devices 移动设备的可视化设计存储库

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602341

V. Paelke, C. Reimann, W. Rosenbach

{"title":"A visualization design repository for mobile devices","authors":"V. Paelke, C. Reimann, W. Rosenbach","doi":"10.1145/602330.602341","DOIUrl":"https://doi.org/10.1145/602330.602341","url":null,"abstract":"Mobile devices with multimedia and graphics capabilities have great potential in a wide variety of applications. In addition to location-based services, mobile-commerce and multimedia entertainment that are often viewed as promising applications of third generation mobile networks mobile devices also offer a potential solution to bridging the digital divide in developing countries. Mobile devices could be used to provide essential IT services like internet access, communication, information, education and banking in areas where no fully developed infrastructures like the electric grid and wire-based net connections are available. Highly usable interfaces will be a critical factor in the development of successful mobile devices and applications. This is especially true if such IT services should become accessible to illiterate or semi-literate users and users without any previous computer experience where the interface will have to rely largely on graphics and speech as interaction mechanisms. However, the design of multimedia-based interfaces for mobile devices is currently complicated by a lack of standardized visualization techniques and interaction mechanisms and the absence of related component libraries and style guides. As a first step towards the development of a standardized set of device-independent presentation and interaction techniques we are currently working on a repository of visualization design solutions for mobile UIs which will later be extended to include general interaction techniques.","PeriodicalId":325699,"journal":{"name":"International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123061530","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}

引用次数: 32

Procedural multiresolution for plant and tree rendering 程序多分辨率的植物和树木渲染

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602336

J. Lluch, E. Camahort, R. Vivó

引用次数: 36

South African Sign Language Machine Translation System 南非手语机器翻译系统

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602339

L. V. Zijl, Dean Barker

引用次数: 34

Rendering optimisations for stylised sketching 渲染优化的风格化草图

International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa Pub Date : 2003-02-03 DOI: 10.1145/602330.602353

H. Winnemöller, S. Bangay

{"title":"Rendering optimisations for stylised sketching","authors":"H. Winnemöller, S. Bangay","doi":"10.1145/602330.602353","DOIUrl":"https://doi.org/10.1145/602330.602353","url":null,"abstract":"We present work that specifically pertains to the rendering stage of stylised, non-photorealistic sketching. While a substantial body of work has been published on geometric optimisations, surface topologies, space-algorithms and natural media simulation, rendering-specific issues are rarely discussed in-depth even though they are often acknowledged. We investigate the most common stylised sketching approaches and identify possible rendering optimisations. In particular, we define uncertainty-functions, which are used to describe a human-error component, discuss how these pertain to geometric perturbation and textured silhouette sketching and explain how they can be cached to improve performance. Temporal coherence, which poses a problem for textured silhouette sketching, is addressed by means of an easily computed visibility-function. Lastly, we produce an effective yet surprisingly simple solution to seamless hatching, which commonly presents a large computational overhead, by using 3-D textures in a novel fashion. All our optimisations are cost-effective, easy to implement and work in conjunction with most existing algorithms.","PeriodicalId":325699,"journal":{"name":"International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128709949","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}

引用次数: 11