2.5D Cartoon Models Author - Alec Rivers from MIT Siming Liu
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Overview Artist draws different views 2
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Overview 2.5D model automatically compute intermediate views
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3D Interpolation 4
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Preserve 2D appearance of cartoons No 3D model Just translate
and interpolate vector art using limited 3D inferences 6
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Related Work 2D3D 7
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2D3D [Johnston and Thomas, 1981] [Sederberg and Greenwood,
1992] [Alexa et al., 2000] 8
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2D3D [Johnston and Thomas, 1981] [Sederberg and Greenwood,
1992] [Alexa et al., 2000] [Rademacher, 1999] [Decaudin, 1996]
[Northrup and Markosian, 2000] 9
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2D3D [Johnston and Thomas, 1981] [Sederberg and Greenwood,
1992] [Alexa et al., 2000] [Decaudin, 1996] [Rademacher, 1999]
[Northrup and Markosian, 2000] [Bourguignon et al., 2001] 10 [Di
Fiore et al., 2001]
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2.5D Cartoon Model 11
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2.5D Cartoon Model 12
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2.5D Interpolation 2D3D Shape Can be approximated with 2D
linear interpolation Requires full 3D mesh; wont work for some
shapes Position Doesnt capture curved paths Easy with a 3D point
Z-OrderingNot possible 13
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2D3D Shape Can be approximated with 2D linear interpolation
Requires full 3D mesh; wont work for some shapes Position Doesnt
capture curved paths Easy with a 3D point Z-OrderingNot possible
2.5D Interpolation 14
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Rotate Face Video 19
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Modify Key View Video 20
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More Complex Video 21
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Applications Cartoons in interactive applications Animation
Camera steady, model moves Flash / cell phones No 3D acceleration
required 22
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Conclusion Advantages 2D drawings without real 3D shape are
possible Easy and fast to create Animation is straightforward
Limitations Highly concave shapes difficult Models cannot natively
be lit, collided with 23
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Thanks! Check out the software at: http://www.alecrivers.com/
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