SD Models: Super-Deformed Character Models
Liang-Tsen Shen
National Taiwan University
Computer Graphics Forum (Proceedings of Pacific Graphics 2012)
The SD models generated by our method. Upper row: the input models. Lower row: the SD style results.
Super-deformed, SD, is a specific artistic style for Japanese manga and anime which exaggerates characters in the goal of appearing cute and funny. The SD style characters are widely used, and can be seen in many anime, CG movies, or games. However, to create an SD model often requires professional skills and considerable time and effort. In this paper, we present a novel technique to generate an SD style counterpart of a normal 3D character model. Our approach uses an optimization guided by a number of constraints that can capture the properties of the SD style. Users can also customize the results by specifying a small set of parameters related to the body proportions and the emphasis of the signature characteristics. With our technique, even a novel user can generate visually pleasing SD models in seconds.
technical paper
presentation slide
(a) Input model (b) rH=1.5, dBH=0.2 (c) rH=2.0, dBH=0.4 (d) rH=2.5, dBH=0.55 (e) rH=3.0, dBH=0.65
Some results generated with different head proportions(rH) and body-to-head width proportions(dBH).

(a) Input model (b) rBF=0.3 (c) rBF=1.0 (d) rBF=3.0
Some results generated with different body-to-feet proportions(rBF).

(a) (b) (c)
The comparison of deforming the giraffe model (a) without (b) and with (c) emphasizing its neck (red area). The stretch factor used in (c) is 1.0.

(a) (b) (c)
The comparison of deforming the camel model (a) without (b) and with (c) emphasizing its hump (red area). The enlarging factor used in (c) is 0.5.

The SD results generated with our method.
We thank the anonymous reviewers for their thoughtful suggestions, and also thank Digimax for providing high quality character models, (Figure 14 and Figure 16), and the artist hand crafted results shown in Figure 14. The models of “baseball cap boy” (Figure 1), "odd guy" (Figure 15), "curly hair girl" (Figure 10), and "robot" (Figure 11) are initially provided by SolidWorks. Figure 2 (a) is the cartoon character "Hatsune Miku" copyrighted by Crypton Future Media. We also thank Sei Imai for designing its SD version (Figure 2 (b)). This research was supported in part by the National Science Council of Taiwan under grant NSC101-2221-E-002-200-MY2.

@article{ Shen:2012:SDM,
     author = {Liang-Tsen Shen and Sheng-Jie Luo and Chun-Kai Huang and Bing-Yu Chen},
     journal = {Computer Graphics Forum},
     title = {SD Models: Super-Deformed Character Models},
     year = {2012},
     volume = {31},
     number = {7},
     pages = {2067--2075},
     note = {(Pacific Graphics 2012 Conference Proceedings)}
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