stereological techniques for solid textures
DESCRIPTION
Julie Dorsey Yale University. Holly Rushmeier Yale University. Stereological Techniques for Solid Textures. Rob Jagnow MIT. Objective. Given a 2D slice through an aggregate material, create a 3D volume with a comparable appearance. Real-World Materials. Concrete Asphalt Terrazzo - PowerPoint PPT PresentationTRANSCRIPT
Stereological Techniquesfor Solid Textures
Rob Jagnow
MIT
Julie Dorsey
Yale University
Holly Rushmeier
Yale University
Given a 2D slice through an aggregate material, create a 3D volume with a comparable appearance.
ObjectiveObjective
Real-World MaterialsReal-World Materials
• Concrete
• Asphalt
• Terrazzo
• Igneous
minerals
• Porous
materials
Independently Recover…Independently Recover…
• Particle distribution
• Color
• Residual noise
Recovering ColorRecovering Color
Select mean particle colors fromsegmented regions in the input image
Input Mean ColorsSyntheticVolume
Recovering NoiseRecovering NoiseHow can we replicate the noisy appearance of the input?
- =
Input Mean Colors Residual
The noise residual is less structured and responds well to
Heeger & Bergen’s method
Synthesized Residual
without noise
Putting it all togetherPutting it all together
Input
Synthetic volumewith noise
Prior Work – RevisitedPrior Work – Revisited
Input Heeger & Bergen ’95 Our result
Results – Physical DataResults – Physical Data
PhysicalModel
Heeger &Bergen ’95
Our Method
ResultsResultsInput Result
ResultsResults
Input Result
An Approximate Global Illumination System for Computer Generated Films
Eric TabellionPDI / DreamWorks
Arnauld LamorlettePDI / DreamWorks
IntroductionIntroduction(a) Direct and indirect lighting (b) Direct lighting only
Example of a character in outside lighting conditions.(a) and (b) were rendered respectively with and without indirect lighting.
Ray Tracing Simplified GeometryRay Tracing Simplified Geometry
Simplified Geometry Micro-polygons Effective Ray Origin
To ray trace simplified geometry, we adjust the ray origin.
Ray Tracing Simplified GeometryRay Tracing Simplified Geometry
(a) (b) (c)
(a) 2 million displaced micro-polygons, without using the ray offsetting algorithm.
(b) using the ray offsetting algorithm, ray tracing only 4 thousand polygons, shown in (c).
Art DirectionArt Direction
(a) using a single bounce of indirect light
(b) using multiple bounces of indirect light
Art DirectionArt Direction
(a) reference (b) saturated (c) warm (d) directional
Art DirectionArt Direction
Triple Product Wavelet Integrals for All-Frequency Relighting
Ren NgStanford University
Pat HanrahanStanford University
Ravi RamamoorthiColumbia University
VideoVideo
Simulating Water and Smoke with anOctree Data Stucture
Frank LosassoStanford University
Industrial Light + Magic
Ron FedkiwStanford University
Industrial Light + Magic
FredericStanford University
VideoVideo
A Method for Animating Viscoelastic Fluids
Tolga G. Goktekin James F. O’BrienAdam W. Bargteil
University of California, Berkeley
VideoVideo