national taiwan university
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SD 1 7 1 2.5 © Crypton Future Media, INC.TRANSCRIPT
National Taiwan University
SD Models: Super-Deformed Character Models Sheng-Jie Luo Liang-Tsen
Shen Bing-Yu Chen Chun-Kai Huang National Taiwan University SD 1 7
1 2.5 Crypton Future Media, INC. Applications Ahmed lumei Rilakkuma
Challenges Goal - + - + optimization Input model Output model Body
Proportions
Head Proportion Body-to-feet Proportion Body-to-head Width
Proportion Body Proportions - + Enlarge Scale Stretch Scale
Signature Characteristics Inputmodel Outputmodel optimization
Related Work 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 Mesh Deformation Skeleton-based
deformation techniques
Linear-Blend Skinning (LBS) Magenat-Thalmann et al. 1988 Lewis et
al. 2000 Geometry Processing Mesh simplification Cigmoni et al.
1997
Garland et al. 1997 Lindstrom et al. 2000 Luebke et al. 2002
Geometry Processing Mesh smoothing Field et al. 1988
Shontz et al. 2003 Baker et al. 2004 Eigensatz et al. 2008 Artistic
Stylization Deussen et al. 2000 Qu et al. 2008
Gal et al. 2007 Rivers et al. 2010 Our Method User Input: Body
Proportion
Input model Head proportion Body-to-feet proportion Body-to-head
width proportion - + - + - + - + User Input: Signature
Characteristics
Marking signature characteristics - + Enlarge Scale Input model - +
Stretch Scale Input model Skeleton Baran et al. SIGGRAPH2007
Template Overview Optimization-based approach Input model &
skeleton
Mesh Deformation Output model Deformed skeleton Skeleton
Deformation Skeleton Deformation Skeleton Deformation Mesh
Deformation Body proportion constraint
Signature characteristic constraint Primitive fitting constraint
Detail smoothing constraint Total energy and optimization Body
Proportion Signature Characteristic
Emphasizing along Skeleton Axes Signature Characteristic
Emphasizing along Skeleton Orthogonal Directions Primitive Fitting
Fitting head to a sphere Primitive Fitting Fitting limbs to a
capsule shape Detail Smoothing Total Energy and Optimization Result
Different body proportion parameters Input model Result Different
body proportion parameters Input model Result 25273 vertices,
seconds Result 4712 vertices, 2.48 seconds Result 1480 vertices,
seconds Result 5000 vertices, seconds Body-part uniformly
scaling
Comparison Input model Body-part uniformly scaling Artist hand
crafted Our method User Study 47 users 12 input models User Study
How cute? 1(Negative) 5(Positive)
Are the SD counterparts cuter than the original model? Which head
proportion is cuter? 3 2 4 5 3.5 Input model Limitation Correctly
embedded skeleton
Self-intersections and vertex sampling density Texture Conclusion
Optimization-based technique
Semi-automatically create a character model with the SD style
Customization Parameters with body proportion Signature Future Work
Solving texture distortion Texture stylization 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 Mikus SD version. This research was supported in
part by the National Science Council of Taiwan under grant NSC E
MY2. Thank you! SD Models: Super-Deformed Character Models
Liang-Tsen Shen, Sheng-Jie Luo, Chun-Kai Huang, and Bing-Yu Chen
Thank you! Additional materials: