ABSTRACT
The design of lighting in Computer Graphics is directly derived from cinematography, and many digital artists follow the conventional wisdom on how lighting is set up to convey drama, appeal, or emotion. In this paper, we are interested in investigating the most commonly used lighting techniques to more formally determine their effect on our perception of animated virtual characters. Firstly, we commissioned a professional animator to create a sequence of dramatic emotional sentences for a typical CG cartoon character. Then, we rendered that character using a range of lighting directions, intensities, and shading techniques. Participants of our experiment rated the emotion, the intensity of the performance, and the appeal of the character. Our results provide new insights into how animated virtual characters are perceived, when viewed under different lighting conditions.
Supplemental Material
- Alton, J. 1995. Painting with light. University of California Press.Google Scholar
- Alvarez, J. M. G., and Lora, A. M., 2016. MeryProject.com. http://www.meryproject.com.Google Scholar
- Birn, J. 2013. Digital lighting and rendering. Pearson Education.Google Scholar
- Calahan, S. 2000. Storytelling through lighting: a computer graphics perspective. Advanced RenderMan: Creating CGI for motion pictures. Morgan Kaufmann, ch. 13, 337--382.Google Scholar
- de Melo, C., and Paiva, A. 2007. Affective Computing and Intelligent Interaction: Second International Conference, ACII 2007 Lisbon, Portugal, September 12-14, 2007 Proceedings. Springer Berlin Heidelberg, Berlin, Heidelberg, ch. Expression of Emotions in Virtual Humans Using Lights, Shadows, Composition and Filters, 546--557. Google ScholarDigital Library
- Ekman, P. 1992. An argument for basic emotions. Cognition and Emotion 6, 3-4, 169--200.Google ScholarCross Ref
- Grodal, T. 2005. 9 film lighting and mood. Moving Image Theory: Ecological Considerations, 152.Google Scholar
- Gurney, J. 2010. Color and light: A guide for the realist painter. Andrews McMeel Publishing.Google Scholar
- Hall, M. 1992. Color and Meaning: Practice and Theory in Renaissance Painting. Cambridge University Press.Google Scholar
- Hery, C., and Villemin, R., 2013. Physically based lighting at pixar. http://graphics.pixar.com/library/PhysicallyBasedLighting/.Google Scholar
- Hyde, J., Carter, E. J., Kiesler, S., and Hodgins, J. K. 2014. Assessing naturalness and emotional intensity: A perceptual study of animated facial motion. In Proceedings of the ACM Symposium on Applied Perception, ACM, New York, NY, USA, SAP '14, 15--22. Google ScholarDigital Library
- Lake, A., Marshall, C., Harris, M., and Blackstein, M. 2000. Stylized rendering techniques for scalable real-time 3d animation. In Proceedings of the 1st International Symposium on Non-photorealistic Animation and Rendering, ACM, New York, NY, USA, NPAR '00, 13--20. Google ScholarDigital Library
- Lowell, R. 1992. Matters of light and depth. lowel-light manufacturing. Inc., New York.Google Scholar
- Malkiewicz, K., and Mullen, M. D. 2005. Cinematography. Simon and Schuster.Google Scholar
- Martin, O., Kotsia, I., Macq, B., and Pitas, I. 2006. The enterface'05 audio-visual emotion database. In Proceedings of the 22Nd International Conference on Data Engineering Workshops, IEEE Computer Society, Washington, DC, USA, ICDEW '06, 8. Google ScholarDigital Library
- McCloud, S. 1994. Understanding Comics: The Invisible Art. HarperPerennial.Google Scholar
- McDonnell, R., Breidt, M., and Bülthoff, H. H. 2012. Render me real?: Investigating the effect of render style on the perception of animated virtual humans. ACM Trans. Graph. 31, 4 (July), 91:1--91:11. Google ScholarDigital Library
- Millerson, G. 1991. The Technique of Lighting for Telivision and Film. Focus Press.Google Scholar
- Moffitt, J. 2004. Caravaggio in Context: Learned Naturalism and Renaissance Humanism. McFarland & Company.Google Scholar
- Mould, D., Mandryk, R. L., and Li, H. 2012. Special section on CANS: Emotional response and visual attention to non-photorealistic images. Comput. Graph. 36, 6 (Oct.), 658--672. Google ScholarDigital Library
- Poland, J. L. 2015. Light, Camera, Emotion! An Examination on Film Lighting and It's Impact on AudiencesEmotional Response. PhD thesis, Cleveland State University.Google Scholar
- Schumann, J., Strothotte, T., Laser, S., and Raab, A. 1996. Assessing the effect of non-photorealistic rendered images in CAD. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, ACM, New York, NY, USA, CHI '96, 35--41. Google ScholarDigital Library
- Seif El-Nasr, M., Niedenthal, S., Kenz, I., Almeida, P., and Zupko, J. 2006. Dynamic lighting for tension in games. Game Studies 7, 1.Google Scholar
- Seifi, H., DiPaola, S., and Enns, J. T. 2012. Exploring the effect of color palette in painterly rendered character sequences. In Proceedings of the Eighth Annual Symposium on Computational Aesthetics in Graphics, Visualization, and Imaging, Eurographics Association, Aire-la-Ville, Switzerland, Switzerland, CAe '12, 89--97. Google ScholarDigital Library
- Todo, H., Anjyo, K.-i., Baxter, W., and Igarashi, T. 2007. Locally controllable stylized shading. ACM Trans. Graph. 26, 3 (July). Google ScholarDigital Library
- Volante, M., Babu, S. V., Chaturvedi, H., Newsome, N., Ebrahimi, E., Roy, T., Daily, S. B., and Fasolino, T. 2016. Effects of virtual human appearance fidelity on emotion contagion in affective inter-personal simulations. IEEE Transactions on Visualization and Computer Graphics 22, 4 (April), 1326--1335. Google ScholarDigital Library
- Wallraven, C., Bülthoff, H. H., Cunningham, D. W., Fischer, J., and Bartz, D. 2007. Evaluation of real-world and computer-generated stylized facial expressions. ACM Trans. Appl. Percept. 4, 3 (Nov.). Google ScholarDigital Library
- Wolf, R., and Block, D. 2014. Scene design and stage lighting. Cengage Learning.Google Scholar
Index Terms
- Perception of lighting and shading for animated virtual characters
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