Macrostructure modeling with microstructure reflectance slices

Details Macrostructure modeling with microstructure reflectance slices Macrostructure modeling with microstructure reflectance slices

2006-10-31

2006-10-31

Nguyen, Kimbinh T. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S427000, C345S582000, C345S583000, C345S592000, C345S649000, C345S424000

Reexamination Certificate

active

07129944

ABSTRACT:
A method and system for efficient synthesis of photorealistic free-form knitwear, where a single cross-section of yarn serves as the basic primitive for modeling entire articles of knitwear. This primitive, called the lumislice, describes radiance from a yarn cross-section based on fine-level interactions, including occlusion, shadowing, and multiple scattering, among yarn fibers. By representing yarn as a sequence of identical but rotated cross-sections, the lumislice can effectively propagate local microstructure over arbitrary stitch patterns and knitwear shapes. This framework accommodates varying levels of detail and capitalizes on hardware-assisted transparency blending. To further enhance realism, a technique for generating soft shadows from yarn is also introduced.

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Westin et al., “Predicting Reflectance Functions from Complex Surfaces”, ACM 1992.
Hanrahan, “Reflection from Layered Surfaces due to Subsurface Scattering”, ACM 1993, pp. 165-174.

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