1 sd models: super-deformed character models sheng-jie luo liang-tsen shen bing-yu chen chiun-kai...
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SD Models:Super-Deformed Character ModelsSheng-Jie LuoLiang-Tsen Shen Bing-Yu ChenChiun-Kai
HuangNational Taiwan University
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SD
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7
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2.5
© Crypton Future Media, INC.
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Applications
Ahmed lumei
© Rilakkuma
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Challenges
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Goal
Input model
Output model
- +Head Proportion
- +Body-to-feet Proportion
- +Body-to-head Width Proportion
Body Proportions
- +Enlarge Scale
- +Stretch Scale
Signature Characteristics
optimization
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Related Work
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Mesh Deformation
Surface-based deformation techniques Alexa et al. 2003 Lipman et al. 2004 Sorkine et al. 2004 Zhou et al. 2005 Huang et al. 2006
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Mesh Deformation
Skeleton-based deformation techniques Linear-Blend Skinning (LBS)
Magenat-Thalmann et al. 1988 Lewis et al. 2000
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Geometry Processing
Mesh simplification Cigmoni et al. 1997 Garland et al. 1997 Lindstrom et al. 2000 Luebke et al. 2002
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Geometry Processing
Mesh smoothing Field et al. 1988 Shontz et al. 2003 Baker et al. 2004 Eigensatz et al. 2008
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Artistic Stylization
Deussen et al. 2000 Qu et al.
2008
Gal et al. 2007Rivers et al.
2010
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Our Method
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User Input: Body Proportion
Head proportion Body-to-feet proportion Body-to-head width proportion
- +- +- +
- +- +- +
- +- +- +
- +- +- +
Input model
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User Input: Signature Characteristics
Marking signature characteristics
- +Enlarge Scale
- +Enlarge Scale
Input model
- +Stretch Scale
- +Stretch Scale
Input model
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Skeleton
TemplateBaran et al. SIGGRAPH2007
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Overview
Optimization-based approach
Input model & skeleton Deformed skeleton
SkeletonDeformation
MeshDeformation
Output model
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Skeleton Deformation
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Skeleton Deformation
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Mesh Deformation
Body proportion constraint Signature characteristic constraint Primitive fitting constraint Detail smoothing constraint
Total energy and optimization
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Body Proportion
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Signature Characteristic
Emphasizing along Skeleton Axes
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Signature Characteristic
Emphasizing along Skeleton Orthogonal Directions
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Primitive Fitting
Fitting head to a sphere
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Primitive Fitting
Fitting limbs to a capsule shape
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Detail Smoothing
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Total Energy and Optimization
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Result
Input model
Different body proportion parameters
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Result
Input model
Different body proportion parameters
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Result
25273 vertices, 16.287 seconds
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Result
4712 vertices, 2.48 seconds
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Result
1480 vertices, 0.749 seconds
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Result
5000 vertices, 2.527 seconds
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Comparison
Input model Body-part uniformly scaling
Our methodArtist hand crafted
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User Study
47 users 12 input models
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User Study
How cute? 1(Negative) 5(Positive) Are the SD counterparts cuter than the
original model? Which head proportion is cuter?
Input model3.55423
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Limitation
Correctly embedded skeleton Self-intersections and vertex sampling density Texture
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Conclusion
Optimization-based technique Semi-automatically create a character model
with the SD style Customization
Parameters with body proportion Signature
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Future Work
Solving texture distortion Texture stylization
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Acknowledgments
We thank the anonymous reviewers for their thoughtful suggestions, and also thank Digimax and SolidWorks for providing high quality character models. We also thank Sei Imai for designing The cartoon character Hatsune Miku’s SD version. This research was supported in part by the National Science Council of Taiwan under grant NSC101-2221-E-002-200-MY2.
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SD Models: Super-Deformed Character ModelsLiang-Tsen Shen, Sheng-Jie Luo, Chun-Kai Huang, and Bing-Yu Chen
Thank you!Additional materials: http://www.cmlab.csie.ntu.edu.tw/~forestking/research/PG12-SDModel/