“Locally controllable stylized shading” by Todo, Anjyo, Baxter and Igarashi
Conference:
Type(s):
Title:
- Locally controllable stylized shading
Presenter(s)/Author(s):
Abstract:
Recent progress in non-photorealistic rendering (NPR) has led to many stylized shading techniques that efficiently convey visual information about the objects depicted. Another crucial goal of NPR is to give artists simple and direct ways to express the abstract ideas born of their imaginations. In particular, the ability to add intentional, but often unrealistic, shading effects is indispensable for many applications. We propose a set of simple stylized shading algorithms that allow the user to freely add localized light and shade to a model in a manner that is consistent and seamlessly integrated with conventional lighting techniques. The algorithms provide an intuitive, direct manipulation method based on a paint-brush metaphor, to control and edit the light and shade locally as desired. Our prototype system demonstrates how our method can enhance both the quality and range of applicability of conventional stylized shading for offline animation and interactive applications.
References:
1. Akers, D., Losasso, F., Klingner, J., Agrawala, M., Rick, J., and Hanrahan, P. 2003. Conveying shape and features with image-based relighting. In IEEE Visualization. (Proceedings of Visualization2003), 349–354. Google ScholarDigital Library
2. Anjyo, K., Wemler, S., and Baxter, W. 2006. Tweakable light and shade for cartoon animation. In NPAR ’06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, 133–139. Google ScholarDigital Library
3. Barla, P., Thollot, J., and Markosian, L. 2006. X-Toon: an extended toon shader. In NPAR ’06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, 127–132. Google ScholarDigital Library
4. Blinn, J. 1977. Models of light reflection for computer synthesized pictures. Computer Graphics 11, 2, 192–198. Google ScholarDigital Library
5. Duchon, J. 1977. Splines minimizing rotation-invariant seminorms in sobolev spaces. In Constructive Theory of Functions of Several Variables number 571 in Lecture Notes in Mathematics, Springer-Verlag, 85–100.Google Scholar
6. Gooch, B., and Gooch, A. 2001. Non-Photorealistic Rendering. AK Peters Ltd. Google ScholarDigital Library
7. Kalnins, R., Markosian, L., Meier, B., Kowalski, M., Lee, J., Davivn, P., M. Webb, Hughes, J., and Finkel-Stein, A. 2002. WYSIWYG NPR: drawing strokes directly on 3D models. ACM Transactions on Graphics. (Proceedings of SIGGRAPH2002) 21, 3, 755–762. Google ScholarDigital Library
8. Kawai, J. K., Painter, J. S., and Cohen, M. F. 1993. Radioptimization: goal based rendering. In Proceedings of SIGGRAPH 1993, Computer Graphics Proceedings, Annual Conference Series, 147–154. Google ScholarDigital Library
9. Lake, A., Marshall, C., Harris, M., and Blackstein, M. 2000. Stylized rendering techniques for scalable real-time 3D animation. In NPAR ’00: Proceedings of the 1st international symposium on Non-photorealistic animation and rendering, 13–20. Google ScholarDigital Library
10. Lee, C. H., Hao, X., and Varshney, A. 2006. Geometry-dependent lighting. IEEE Transactions on Visualization and Computer Graphics 12, 2, 197–207. Google ScholarDigital Library
11. Okabe, M., Zeng, G., Matsushita, Y., Igarashi, T., Quan, L., and Shum, H.-Y. 2006. Single-view relighting with normal map painting. In Proceedings of Pacific Graphics 2006, 27–34.Google Scholar
12. Pellacini, F., Tole, P., and Greenberg, D. P. 2002. A user interface for interactive cinematic shadow design. ACM Transactions on Graphics. (Proceedings of SIGGRAPH2002) 21, 3, 563–566. Google ScholarDigital Library
13. Rusinkiewicz, S., Burns, M., and DeCarlo, D. 2006. Exaggerated shading for depicting shape and detail. ACM Transactions on Graphics. (Proceedings of SIGGRAPH2006) 25, 3, 1199–1205. Google ScholarDigital Library
14. Schoeneman, C., Dorsey, J., Smits, B., Arvo, J., and Greenburg, D. 1993. Painting with light. In Proceedings of SIGGRAPH 1993, Computer Graphics Proceedings, Annual Conference Series, 143–146. Google ScholarDigital Library
15. Sloan, P.-P. J., Martin, W., Gooch, A., and Gooch, B. 2001. The lit sphere: a model for capturing npr shading from art. In Proceedings of Graphics Interface 2001, 143–150. Google ScholarDigital Library
16. Turk, G., and O’Brien, J. F. 1999. Shape transformation using variational implicit functions. In Proceedings of SIGGRAPH 1999, Computer Graphics Proceedings, Annual Conference Series, 335–342. Google ScholarDigital Library
17. Wahba, G. 1990. Spline Models for Observational Data. SIAM.Google Scholar
