Capturing and rendering geometry details for BTF-mapped surfaces

doi:10.1007/s00371-005-0318-y

	Capturing and rendering geometry details for BTF-mapped surfaces
	Wang, JP ; Tong, X ; Snyder, J ; Chen, YY ; Guo, BN ; Shum, HY
	2005-09-01
发表期刊	VISUAL COMPUTER
ISSN	0178-2789
卷号	21 期号:8-10 页码:559-568
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.
关键词	bidirectional texture functions reflectance and shading models rendering shadow algorithms texture mapping
DOI	10.1007/s00371-005-0318-y
收录类别	SCI
语种	英语
WOS研究方向	Computer Science
WOS类目	Computer Science, Software Engineering
WOS记录号	WOS:000231857400008
出版者	SPRINGER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/9976
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.Chinese Acad Sci, Grad Sch, Inst Comp Technol, Beijing 100864, Peoples R China 2.Microsoft Res Asia, Internet Graph Grp, Beijing, 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.