1 / 38

Lapped Solid Textures: Filling a Model with Anisotropic Textures

Lapped Solid Textures: Filling a Model with Anisotropic Textures. Kenshi Takayama 1 Makoto Okabe 1 Takashi Ijiri 1 Takeo Igarashi 1,2 1 The University of Tokyo 2 JST ERATO. Goal. Create 3D models with internal textures Target: natural objects Fruits, vegetables, …

evelyndbrown
Download Presentation

Lapped Solid Textures: Filling a Model with Anisotropic Textures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lapped Solid Textures:Filling a Model with Anisotropic Textures Kenshi Takayama1Makoto Okabe1 Takashi Ijiri1Takeo Igarashi1,2 1The University of Tokyo 2JST ERATO

  2. Goal • Create 3D models with internal textures • Target: natural objects • Fruits, vegetables, … • Non-uniform internal structure Demo

  3. Our approach

  4. Key idea: Extend “Lapped textures” to 3D Lapped textures [Praun et al. ’00] Patch-pasting Texture patch 2D texture exemplar Surface vector field Triangular mesh Result

  5. Key idea: Extend “Lapped textures” to 3D Lapped solid textures Patch-pasting 3D texture exemplar Texture patch Volumetric tensor field Tetrahedral mesh Result

  6. Related work

  7. Procedural approach  Pros • Compact • Arbitrary resolution  Cons • Difficult to control • Uniform patterns only [Perlin ’85] [Cutler et al. ’04]

  8. Tweaking 2D photos  Pros • Intuitive user interface • Non-uniform structure  Cons • Artifacts • Inconsistency(Owada) • Blur by morphing (Pietroni) [Owada et al. ’04] [Pietroni et al. ’07]

  9. Solid texture synthesis [Heeger and Bergen ’95; Ghazanfarpour and Dischler ’96; Dischler et al. ’98; Lefebvre and Poulin ’00 ; Wei ’02; Jagnow et al. ’04; Qin and Yang ’07; Kopf et al. ’07; Dong et al. ’08]  Pros • Quality 3D texture from 2D examplars  Cons • Data-intensive • Difficult to handle non-uniform structure [Kopf et al. ’07]

  10. Contributions • Extend “Lapped textures” to 3D • Select position • Paste • Adjust shape Please refer tothe paper!

  11. Contributions(contd.) • Classification of solid textures • User interface for tensor field design • Creation of depth-varying models

  12. Classification of solid textures • User interface for tensor field design • Creation of depth-varying models

  13. Classification of solid textures • Based on 2aspects Anisotropy level  Change in appearance w.r.t. cutting orientation a a Variation level  Change in pattern w.r.t. spatial position b c b c

  14. Anisotropy level • Change in appearance w.r.t. cutting orientation Level 0 Level 1 Level 2 Level Axis a c b Align with –(Isotropic) 3D vector 3D tensor

  15. Variation level • Change in pattern w.r.t. spatial position Level 0 Level 1 Level 2 Level 3 Level a b 0D （Homogeneous） 1D 2D 3D c Vary in

  16. Anisotropy level 0 1 2 Tilability 3D 0 0 1-a 2-a 2D – Variation level 1 1-b 2-b [Owada’04] [Ours] 1D 2 – – 2-c 0D 3 – – 2-d Demo

  17. Classification of solid textures • User interface for tensor field design • Creation of depth-varying models

  18. User interface for tensor field design • Set depth field • Similar to [Owada’04] • Draw stroke on layers Demo

  19. Classification of solid textures • User interface for tensor field design • Creation of depth-varying models

  20. Creation of depth-varying models • Depth-varying textures Depth Type 1-b Type 2-b

  21. Creation of depth-varying models • 3kinds of texture patch Outer Middle Inner

  22. Creation of depth-varying models • Choose one according to depth

  23. Results

  24. Limitations • Artifacts • Tensor field singularities

  25. Limitations • Artifacts • Highly-structured textures Blurring Misalignment

  26. Limitations • How to create texture exemplar? • Currently: ad-hocmethods • Sweep of 2D image • Noise function • Putting 3D geometry • Copy / paste • Solid texture synthesis In-house voxel editor

  27. Conclusion • Patch-based approach to creating 3D models with internal textures • Extend “Lapped textures” to 3D • Contributions • Classification of solid textures • User interface for tensor field design • Creation of depth-varying models

  28. Thank you! Acknowledgements: Shigeru Owada Kazuo Nakazawa(Sony CSL) (National Cardiovascular Center) SIGGRAPH reviewers Funded by IPA(Information-technology Promotion Agency, Japan)

  29. Data representation v0 • Store texture coordinates only v2 v1 v3 w0 w0 w0 w1 w1 w1 w2 w2 w2 w3 w3 w3

  30. Data representation • Store texture coordinates only • When cutting: • Linearly interpolate texture coordinates • No voxel computation!

  31. Statistics CPU: 2.33 GHz RAM: 1.0 GB

  32. Future work • Anisotropic reflection • Different color at same position! • Depends on cutting orientation

  33. Future work • Translucent objects • Colors on cross-section reveals internal content  Traditional synthesis methods cannot handle!

  34. Creation of texture patch • Constant “splotch” mask Mask shape Cross-sections

  35. Creation of texture patch • Assume less-structured textures • What if texture is highly structured? Future work

More Related