SIGGRAPH 2010 Interactive On-Surface Signal Deformation Tobias Ritschel 1 Thorsten Thormählen 1 Carsten Dachsbacher 2 Jan Kautz 3 Hans-Peter Seidel 1 1 Max-Planck-Institut Informatik 2 Karlsruhe Institute of Technology 3 University College London

Motivation

Arbitrary Signals on 2D Surfaces in 3D Surface signal

Shadow Signal Light Shadow

Edit Metaphor

Soft Shadow Signal Area light Soft Shadow

Global Illumination Signal Light Indirect light

Caustic Signal Light Caustic

3D Texture Signal Polka dots

Previous Work Appearance editing Colbert et al Kautz et al Anjyo et al Todo et al Light & Material Perception Fleming et al Ramanarayana et al Khan et al Light editing Schöneman et al Poulin et al Pellacini et al Obert et al. 2008

Previous Work Surface deformation Sumner et al Botsch et al Meshless deformation Igarashi et al Müller et al Schaefer et al Sorkine and Alexa 2007

Previous Work Shadow & Reflection editing Ritschel et al Kerr et al Obert et al Parametrization Tzur and Tal 2008 Ischreiner et al Schmidt et al. 2006

Our Approach location  deformed location : shading at location  radiance : shading at deformed location  radiance

Our Approach

Shadow Signal (3D Deformation) Light Shadow

Solver Deformation points

Solver Step 0

Solver Step 1

Solver Step 2

Solver Step 3

Objective Function is evaluated in parallel on the GPU

Objective: Maintain Distance

Objective: Stay on Surface

Distance Field

Energy: Handles

Multi-Resolution Approach Level 2 Level 1 Level 0

Splatting deformed point undeformed point positional term (3D position) Gaussian fall-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 deformation allows different kinds of shading signals to be deformed 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 Okabe Michael Wand Martin Bokeloh Elmar Eisemann Zhao Dong Robert W. Sumner Jovan Popovic Stanford 3D Scanning Repository Initial ideas Internal review Discussions Animal animation 3D models We would like to thank…