SIGGRAPH 2010

Interactive On-Surface Signal Deformation Tobias Ritschel1 Thorsten Thormählen1

Carsten Dachsbacher2 Jan Kautz3 Hans-Peter Seidel1

1Max-Planck-Institut Informatik 2Karlsruhe Institute of Technology 3University College London

Motivation

Arbitrary Signals on 2D Surfaces in 3D

Surface signal

Shadow Signal

LightShadow

Edit Metaphor

Soft Shadow Signal

Area light

Soft Shadow

Global Illumination Signal

Light

Indirect light

Caustic Signal

LightCaustic

3D Texture Signal

Polka dots

Previous Work

Appearance editingColbert et al. 2006Kautz et al. 2007Anjyo et al. 2003Todo et al. 2004

Light & Material PerceptionFleming et al. 2003Ramanarayana et al. 2005Khan et al. 2006

Light editingSchöneman et al. 1993Poulin et al. 1997Pellacini et al. 2007Obert et al. 2008

Previous Work

Surface deformationSumner et al. 2005Botsch et al. 2005

Meshless deformationIgarashi et al. 2005Müller et al. 2005Schaefer et al. 2006Sorkine and Alexa 2007

Previous Work

Shadow & Reflection editingRitschel et al. 2009Kerr et al. 2010Obert et al. 2010

ParametrizationTzur and Tal 2008Ischreiner et al. 2004Schmidt et al. 2006

Our Approach

location deformed location

: shading atlocation radiance

: shading at deformed location radiance

Our Approach

Shadow Signal (3D Deformation)

LightShadow

Solver

Deformationpoints

Solver Step 0

Solver Step 1

Solver Step 2

Solver Step 3

Objective Function

is evaluated inparallel

on the GPU

Objective: Maintain Distance

Objective: Stay on Surface

Distance Field

Energy: Handles

Multi-Resolution Approach

Level 2Level 1Level 0

Splatting

deformedpoint

undeformedpoint

positional term(3D position)

Gaussianfall-off

Splatting

Results: 3D Texture

Results: Indirect Light

Results: Caustic

Results: Difficult Topology

Results: Sketching

Results: Dynamic Shadow Caster

Results: Different Signals

select signal here

Conclusion

Interactive on-surface signal deformationallows different kinds of shading signals to bedeformed on a surface

Limitations and Future Work

• Perceptual bounds for edits• Edits on deforming object• Higher-dimensional (4D) editing of light transport

Thank you!

Makoto OkabeMichael WandMartin BokelohElmar EisemannZhao DongRobert W. SumnerJovan PopovicStanford 3D Scanning Repository

Initial ideasInternal reviewInternal reviewDiscussionsDiscussionsAnimal animationAnimal animation3D models

We would like to thank…