Volumetric hair rendering

Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C345S473000

Reexamination Certificate

active

07450122

ABSTRACT:
A volumetric representation of a hair simulation model determines collective hair attributes. To determine inter-hair collisions, vertices include average velocities of the adjacent portions of the model. The average velocities determine target velocities. Forces for the model are determined from the target velocity values. To direct hair to a desired pose, vertices include target and current density values representing the density of adjacent portions of the model in the desired pose and current position, respectively. The differences in density values determine pressure forces applied to the model. To determine the illumination of the hair, vertices include density values representing the density of adjacent portions of the model. The density values define a hair surface, and signed distance values relative to the surface are determined for the vertices. Normal vectors are determined from the gradients of the signed distance values at locations corresponding the positions of the hairs.

REFERENCES:
patent: 4914589 (1990-04-01), Crawford
patent: 5404426 (1995-04-01), Usami et al.
patent: 5673213 (1997-09-01), Weigl
patent: 5758046 (1998-05-01), Rouet et al.
patent: 5764233 (1998-06-01), Brinsmead et al.
patent: 5777619 (1998-07-01), Brinsmead
patent: 5793375 (1998-08-01), Tanaka
patent: 5870096 (1999-02-01), Anjyo et al.
patent: 6097396 (2000-08-01), Rouet et al.
patent: 6141431 (2000-10-01), Munetsugu et al.
patent: 6348924 (2002-02-01), Brinsmead
patent: 6559849 (2003-05-01), Anderson et al.
patent: 6657629 (2003-12-01), Baraff et al.
patent: 6720962 (2004-04-01), Alter
patent: 6750866 (2004-06-01), Anderson, III
patent: 6940508 (2005-09-01), Lengyel
patent: 6952218 (2005-10-01), Bruderlin
patent: 2003/0179203 (2003-09-01), Bruderlin et al.
Zöckler et al., “Interactive Visualization Of 3D-Vector Fields Using Illuminated Stream Lines”, 1996 IEEE, pp. 107-113 and 474.
Glassner, A., “Situation normal [Gourand and Phong shading]”, IEEE Computer Graphics and Applications, vol. 17, Issue 2, Mar.-Apr. 1997, pp. 83-87.
Gibson, S., “Using distance maps for accurate surface representation in sampled volumes”, IEEE Symposium on Volume Visualization, Oct. 19-20, 1998, pp. 23-30, 163.
Xiaohu Guo et al., “Dynamic sculpting and deformation of point set surfaces”, Proc. 11th Pacific Conference on Computer Graphics and Applications, Oct. 8-10, 2003, pp. 123-130.
Tae-Yong Kim et al., “A thin shell volume for modeling human hair”, Proc. Computer Animation 2000, pp. 104-111.
Etzmuss, O.; Gross, J.; Strasser, W., “Deriving a particle system from continuum mechanics for the animation of deformable objects”, IEEE Transactions on Visualization and Computer Graphics, vol. 9, Issue 4, Oct.-Dec. 2003, pp. 538-550.
Tubic, D., “A volumetric approach for interactive 3D modeling”, Proc. First International Symposium on 3D Data Processing Visualization and Transmission, Jun. 19-21, 2002, pp. 150-158.
Sigg, C., “Signed distance transform using graphics hardware”, IEEE Visualization, VIS 2003, Oct. 19-24, 2003, pp. 83-90.
Neyret, F., “Modeling, animating, and rendering complex scenes using volumetric textures”, IEEE Transactions on Visualization and Computer Graphics, vol. 4, Issue 1, Jan.-Mar. 1998, pp. 55-70.
Ge Cong et al., “Shape metamorphism using p-Laplacian equation”, Proceedings of the 17th International Conference on Pattern Recognition, vol. 4, Aug. 23-26, 2004, pp. 15-18.
Ward, et al., “Adaptive grouping and subdivision for simulating hair dynamics”, Proc 11th Pacific Conference on Computer Graphics and Applications, 2003. Oct. 8-10, 2003 pp. 234-243.
Ward, et al., “Modeling Hair Using Level-of-Detail Representations”, Proc 16thInternational Conference on Computer Animation and Social Agents, 2003, May 8-9, 2003, pp. 41-47.
Wenjun Lao et al., “An improved algorithm for hairstyle dynamics”, Proc. Fourth IEEE International Conference on Multimodal Interfaces, 2002, pp. 535-540.
Ka{hacek over (c)}ić-Alesić, Z. et al., “A practical dynamics system”, Proc. of 2003 ACM Siggraph/Eurographics Symposium on Computer Animation, pp. 7-16.
Reeves, W. T., “Particle Systems-a Technique for Modeling a Class of Fuzzy Objects”, ACM Transactions on Graphics 2, 1983, pp. 91-108.
Kajiya, et al., “Rendering Fur with Three Dimensional Textures”, 1989, ACM, pp. 271-280.
Watanabe, Y., “A trigonal prism-based method for hair image generation”, IEEE Computer Graphics and Applications, vol. 12, Issue 1, Jan. 1992, pp. 47-53.
Anjyo, et al., “A Simple Method for Extracting the Natural Beauty of Hair”, 1992, ACM, pp. 111-120.
A. Witkin, et al., “Using Particles to Sample and Control Implicit Surfaces”, Computer Graphics (ACM SIGGRAPH Proceedings), 1994. pp. 1-9.
Iones, A. et al., “Fur and hair: practical modeling and rendering techniques”, Proc. IEEE International Conference on Information Visualization, 2000, pp. 145-151.
Zhan Xu et al., “V-HairStudio: an interactive tool for hair design”, IEEE Computer Graphics and Applications, vol. 21, Issue 3, May/Jun. 2001, pp. 36-43.
Kim, T. et al., “Interactive multiresolution hair modeling and editing”, Proc. of 29th Annual Conference on Computer Graphics and interactive Techniques, SIGGRAPH '02, ACM Press, New York, NY, pp. 620-629.
Bertails, et al., “Adaptive Wisp Tree—a multiresolutional control structure for simulating dynamic clustering in hair motion”, Proc. of 2003 ACM Siggraph/Eurographics Symposium on Computer Animation, ACM, pp. 207-377.
Volino, P. et al., “Animating complex hairstyles in real-time”, Proc. of ACM Symposium on Virtual Reality Software and Technology, Nov. 2004, ACM Press, New York, NY, pp. 41-48.
Wenqi Liang; Zhiyong Huang; “An enhanced framework for real-time hair animation”, Proceedings. 11th Pacific Conference on Computer Graphics and Applications, Oct. 8-10, 2003, pp. 467-471.
Ward, K.; et al., “A Survey on Hair Modeling: Styling, Simulation, and Rendering”, Transactions on Visualization and Computer Graphics, vol. 13, Issue 2, Mar.-Apr. 2007, pp. 213-234.
Chang, Johnny T. et al.; “A Pracitcal Model for Hair Mutual Interactions”; 2002,Proceedings of the 2002 ACM Siggraph/Eurographics Symposium on Computer Animation, pp. 73-80.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Volumetric hair rendering does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Volumetric hair rendering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Volumetric hair rendering will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4033915

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.