ACM SIGGRAPH 2003 Papers最新文献_第6页

Structured importance sampling of environment maps 环境图的结构化重要抽样

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882314

Sameer Agarwal, R. Ramamoorthi, Serge J. Belongie, H. Jensen

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引用次数: 221

Linear algebra operators for GPU implementation of numerical algorithms 线性代数运算符为GPU实现的数值算法

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882363

J. Krüger, R. Westermann

引用次数: 160

Wang Tiles for image and texture generation 王瓷砖的图像和纹理生成

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882265

Michael F. Cohen, Jonathan Shade, Stefan Hiller, O. Deussen

{"title":"Wang Tiles for image and texture generation","authors":"Michael F. Cohen, Jonathan Shade, Stefan Hiller, O. Deussen","doi":"10.1145/1201775.882265","DOIUrl":"https://doi.org/10.1145/1201775.882265","url":null,"abstract":"We present a simple stochastic system for non-periodically tiling the plane with a small set of Wang Tiles. The tiles may be filled with texture, patterns, or geometry that when assembled create a continuous representation. The primary advantage of using Wang Tiles is that once the tiles are filled, large expanses of non-periodic texture (or patterns or geometry) can be created as needed very efficiently at runtime.Wang Tiles are squares in which each edge is assigned a color. A valid tiling requires all shared edges between tiles to have matching colors. We present a new stochastic algorithm to non-periodically tile the plane with a small set of Wang Tiles at runtime.Furthermore, we present new methods to fill the tiles with 2D texture, 2D Poisson distributions, or 3D geometry to efficiently create at runtime as much non-periodic texture (or distributions, or geometry) as needed. We leverage previous texture synthesis work and adapt it to fill Wang Tiles. We demonstrate how to fill individual tiles with Poisson distributions that maintain their statistical properties when combined. These are used to generate a large arrangement of plants or other objects on a terrain. We show how such environments can be rendered efficiently by pre-lighting the individual Wang Tiles containing the geometry.We also extend the definition of Wang Tiles to include a coding of the tile corners to allow discrete objects to overlap more than one edge. The larger set of tiles provides increased degrees of freedom.","PeriodicalId":314969,"journal":{"name":"ACM SIGGRAPH 2003 Papers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130300686","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: 209

Evaluating the visual fidelity of physically based animations 评估基于物理的动画的视觉保真度

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882303

C. O'Sullivan, J. Dingliana, T. Giang, M. Kaiser

{"title":"Evaluating the visual fidelity of physically based animations","authors":"C. O'Sullivan, J. Dingliana, T. Giang, M. Kaiser","doi":"10.1145/1201775.882303","DOIUrl":"https://doi.org/10.1145/1201775.882303","url":null,"abstract":"For many systems that produce physically based animations, plausibility rather than accuracy is acceptable. We consider the problem of evaluating the visual quality of animations in which physical parameters have been distorted or degraded, either unavoidably due to real-time frame-rate requirements, or intentionally for aesthetic reasons. To date, no generic means of evaluating or predicting the fidelity, either physical or visual, of the dynamic events occurring in an animation exists. As a first step towards providing such a metric, we present a set of psychophysical experiments that established some thresholds for human sensitivity to dynamic anomalies, including angular, momentum and spatio-temporal distortions applied to simple animations depicting the elastic collision of two rigid objects. In addition to finding significant acceptance thresholds for these distortions under varying conditions, we identified some interesting biases that indicate non-symmetric responses to these distortions (e.g., expansion of the angle between post-collision trajectories was preferred to contraction and increases in velocity were preferred to decreases). Based on these results, we derived a set of probability functions that can be used to evaluate the visual fidelity of a physically based simulation. To illustrate how our results could be used, two simple case studies of simulation levels of detail and constrained dynamics are presented.","PeriodicalId":314969,"journal":{"name":"ACM SIGGRAPH 2003 Papers","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121394618","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: 115

The space of human body shapes: reconstruction and parameterization from range scans 人体形状空间:距离扫描的重建与参数化

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882311

Brett Allen, B. Curless, Zoran Popovic

引用次数: 1232

Progressive encoding of complex isosurfaces 复杂等值面的渐进式编码

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882294

Haeyoung Lee, M. Desbrun, P. Schröder

引用次数: 54

Designing effective step-by-step assembly instructions 设计有效的分步组装说明

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882352

Maneesh Agrawala, Doantam Phan, Julie Heiser, J. Haymaker, J. Klingner, P. Hanrahan, B. Tversky