Pattern Formation in Computer Graphics Marcelo Walter Instituto de - - PowerPoint PPT Presentation

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Pattern Formation in Computer Graphics Marcelo Walter Instituto de - - PowerPoint PPT Presentation

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Pattern Formation in Computer Graphics Marcelo Walter Instituto de Informtica UFRGS VISGRAF Lab Webinar 23/09/2020 A little bit about our World Objects have shape and

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Pattern Formation in Computer Graphics

Marcelo Walter Instituto de Informática – UFRGS VISGRAF Lab Webinar 23/09/2020

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A little bit about our World…

Objects have shape and appearance

Imagem de Nenad Maric por Pixabay

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https://www.monaconatureencyclopedia.com/giraffa-camelopardalis/?lang=en

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in Computer Graphics

Objects have shape and appearance separated…

A little bit about our World…

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The Need for Integration

  • E. Grevyi (80 stripes)

A unity underlying the different zebra striping patterns.

  • B. L. Bard Jonathan. Journal of Zoology: 183(4), 1977

Equus burchelli (26 stripes)

  • E. Zebra (55 stripes)
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Diversity in Animal Kingdom

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Contrasting coloration in terrestrial mammals. T. Caro. Phil.

  • Trans. R. Soc. B (2009) 364, 537–548

5000!!

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A Brief Timeline

2001 1991 2003 2010

1 2 3 4

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New Kid on the Block

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KING RICHARD III Rage must be withstood: Give me his gage: lions make leopards tame. THOMAS MOWBRAY Yea, but not change his spots: take but my shame. Can the Ethiopian change his skin, or the leopard his spots? Neither can you do good who are accustomed to doing evil. Jeremiah ch. 13, v. 23

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Seashells – Fully Integrated Model

Modeling Seashells Deborah R. Fowler, Hans Meinhardt, Przemyslaw Prusinkiewicz Proceedings of SIGGRAPH 92 9

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What about other domains?

http://www.africanbudgetsafaris.com/images/tours/three-rondawels.jpg

Fortaleza Canyon – RS

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What about the Plant Kingdom?

Robert W. Korn. Watermelon stripes. A case for the clonal mosaic model in plants. Journal of Theoretical Biology (2007) 11

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Hanwoo Cow

A unifying theory?

http://en.wikipedia.org/wiki/Loricariidae

Biology of epidermal and hair pigmentation in cattle: a mini-review. Seo K, Mohanty TR, Choi T, Hwang I. Vet Dermatol. 2007;18(6):392-400

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To Wrap it Up

The Good News is that we still have a long way to go! The Bad News is that we still have a long way to go!

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Referências

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1 2 3 4 Walter, M., Fournier, A., & Menevaux, D. (2001). Integrating shape and pattern in mammalian models. In Proceedings of the 28th annual conference

  • n Computer graphics and interactive techniques (pp. 317-326).

Turk, G. (1991). Generating textures on arbitrary surfaces using reaction-

  • diffusion. Acm Siggraph Computer Graphics, 25(4), 289-298.

Zhang, J., Zhou, K., Velho, L., Guo, B., & Shum, H. Y. (2003). Synthesis of progressively-variant textures on arbitrary surfaces. ACM Transactions on Graphics (TOG), 22(3), 295-302. Wang, L., Zhou, K., Yu, Y., & Guo, B. (2010). Vector solid textures. ACM Transactions on Graphics (TOG), 29(4), 1-8.

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Obrigado!

marcelo.walter@inf.ufrgs.br