Capturing and rendering geometry details for BTF-mapped surfaces
文献类型：期刊论文
| 作者 | Wang, JP; Tong, X; Snyder, J; Chen, YY; Guo, BN; Shum, HY |
| 刊名 | VISUAL COMPUTER
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 21期号:8-10页码:559-568 |
| 关键词 | bidirectional texture functions reflectance and shading models rendering shadow algorithms texture mapping |
| ISSN号 | 0178-2789 |
| DOI | 10.1007/s00371-005-0318-y |
| 英文摘要 | Bidirectional texture functions, or BTFs, accurately model reflectance variation at a fine (meso-) scale as a function of lighting and viewing direction. BTFs also capture view-dependent visibility variation, also called masking or parallax, but only within surface contours. Mesostructure detail is neglected at silhouettes, so BTF-mapped objects retain the coarse shape of the underlying model. We augment BTF rendering to obtain approximate mesoscale silhouettes. Our new representation, the 4D mesostructure distance function (MDF), tabulates the displacement from a reference frame where a ray first intersects the mesoscale geometry beneath as a function of ray direction and ray position along that reference plane. Given an MDF, the mesostructure silhouette can be rendered with a per-pixel depth peeling process on graphics hardware, while shading and local parallax are handled by the BTF. Our approach allows real-time rendering, handles complex, non-height-field mesostructure, requires that no additional geometry be sent to the rasterizer other than the mesh triangles, is more compact than textured visibility representations used previously, and, for the first time, can be easily measured from physical samples. We also adapt the algorithm to capture detailed shadows cast both by and onto BTF-mapped surfaces. We demonstrate the efficiency of our algorithm on a variety of BTF data, including real data acquired using our BTF-MDF measurement system. |
| WOS研究方向 | Computer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000231857400008 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.204/handle/2XEOYT63/9975]  |
| 专题 | 中国科学院计算技术研究所期刊论文_英文 |
| 通讯作者 | Wang, JP |
| 作者单位 | 1.Microsoft Res Asia, Internet Graph Grp, Beijing, Peoples R China 2.Chinese Acad Sci, Grad Sch, Inst Comp Technol, Beijing 100864, Peoples R China 3.Microsoft Res, Reading, Berks, England |
| 推荐引用方式 GB/T 7714 | Wang, JP,Tong, X,Snyder, J,et al. Capturing and rendering geometry details for BTF-mapped surfaces[J]. VISUAL COMPUTER,2005,21(8-10):559-568. |
| APA | Wang, JP,Tong, X,Snyder, J,Chen, YY,Guo, BN,&Shum, HY.(2005).Capturing and rendering geometry details for BTF-mapped surfaces.VISUAL COMPUTER,21(8-10),559-568. |
| MLA | Wang, JP,et al."Capturing and rendering geometry details for BTF-mapped surfaces".VISUAL COMPUTER 21.8-10(2005):559-568. |
入库方式： OAI收割
来源：计算技术研究所
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