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147
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POLICY
2004
Springer
15 years 11 months ago
2004
Springer
We study the specification of access control policy in large-scale distributed systems. Our work on real-world policies has shown that standard policy idioms such as role hierarc...
184
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VISSYM
2004
15 years 7 months ago
2004
This paper presents a novel framework for illustrating surfaces in a volume. Surfaces are illustrated by drawing only feature lines, such as silhouettes, valleys, ridges, and surf...
148
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CGF
2004
15 years 6 months ago
2004
Hatching lines are often used in line illustrations to convey tone and texture of a surface. In this paper we present methods to generate hatching lines from polygonal meshes and ...
129
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ISBI
2004
IEEE
16 years 7 months ago
2004
IEEE
Fourier-based forward and back-projection methods have the potential to reduce computation demands in iterative tomographic image reconstruction. Interpolation errors are a limita...
199
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VRCAI
2004
ACM
15 years 11 months ago
2004
ACM
This paper presents real-time reconstruction of dynamic 3D avatar for interactive mixed reality. In computer graphics, one of the main goals is the combination of virtual scenes w...