A PSYCHOPHYSICAL STUDY OF FOVEAL GRADIENT BASED SELECTIVE RENDERING

Veronica Sundstedt

2008

Abstract

High-fidelity rendering of complex scenes at interactive rates is one of the primary goals of computer graphics. Since high-fidelity rendering is computationally expensive, perceptual strategies such as visual attention have been explored to achieve this goal. Inattentional Blindness (IB) experiments have shown that observers conducting a task can fail to see an object, although it is located within the foveal region (2◦). However, previous attention based algorithms assumed that IB would be restricted to the area outside the foveal region, selectively rendering the areas around task-related objects in high quality and the surrounding areas in lower quality. This paper describes a psychophysical forced-choice preference experiment assessing if participants, performing a task or free-viewing animations, would fail to notice rendering quality degradation within the foveal region. The effect of prior knowledge on the level of perceived quality is also studied. The study involves 64 participants in four conditions: performing a task, or free-viewing a scene, while being naive or informed about assessing rendering quality. Our results show that participants fail to notice the additional reduction in quality, decreasing the overall computation 13 times. There was also a significant difference in the results if free-viewing participants were informed.

References

  1. Baudisch, P., DeCarlo, D., Duchowski, A. T., and Geisler, W. S. (2003). Focusing on the essential: considering attention in display design. Commun. ACM, 46(3):60- 66.
  2. Brown, R., Cooper, L., and Pham, B. (2003). Visual attention-based polygon level of detail management. In GRAPHITE 7803: Proceedings of the 1st international conference on Computer graphics and interactive techniques in Australasia and South East Asia, pages 55-62, New York, NY, USA. ACM Press.
  3. Cater, K., Chalmers, A., and Ledda, P. (2002). Selective quality rendering by exploiting human inattentional blindness: looking but not seeing. In VRST 7802: Proceedings of the ACM symposium on Virtual reality software and technology, pages 17-24, New York, NY, USA. ACM Press.
  4. Cater, K., Chalmers, A., and Ward, G. (2003). Detail to attention: exploiting visual tasks for selective rendering. In EGRW 7803: Proceedings of the 14th Eurographics workshop on Rendering, pages 270-280, Aire-laVille, Switzerland, Switzerland. Eurographics Association.
  5. Debattista, K. (2006). Selective Rendering for HighFidelity Graphics. PhD thesis, University of Bristol.
  6. Haber, J., Myszkowski, K., Yamauchi, H., and Seidel, H.- P. (2001). Perceptually guided corrective splatting. Computer Graphics Forum, 20(3):142-152.
  7. Howlett, S., Hamill, J., and O'Sullivan, C. (2005). Predicting and Evaluating Saliency for Simplified Polygonal Models. ACM Trans. Appl. Percept., 2(3):286-308.
  8. Itti, L., Koch, C., and Niebur, E. (1998). A Model of Saliency-Based Visual Attention for Rapid Scene Analysis. IEEE Trans. Pattern Anal. Mach. Intell., 20(11):1254-1259.
  9. James, W. (1957). The Principles of Psychology. Dover Publications Inc.
  10. Lee, C. H., Varshney, A., and Jacobs, D. W. (2005). Mesh saliency. In SIGGRAPH 7805: ACM SIGGRAPH 2005 Papers, pages 659-666, New York, NY, USA. ACM Press.
  11. Longhurst, P. (2005). Rapid Saliency Identification for Selectively Rendering High Fidelity Graphics. PhD thesis, University of Bristol.
  12. Loschky, L. C., Mcconkie, G. W., Reingold, E. M., and Stampe, D. M. (2003). Gaze-Contingent Multiresolutional Displays: An Integrative Review. Human Factors, 45(2):307-328.
  13. Mack, A. and Rock, I. (1998). Inattentional Blindness. MIT Press.
  14. McConkie, G. W. and Loschky, L. C. (1997). Human Performance with a Gaze-Linked Multi-Resolutional Display. In Advanced Displays and Interactive Displays First Annual Symposium, pages 25-34.
  15. McNamara, A. (2001). Visual Perception in Realistic Image Synthesis. Computer Graphics Forum, 20(4):211- 224.
  16. Myszkowski, K., Przemyslaw, R., and Tawara, T. (1999). Perceptually-informed Accelerated Rendering of High Quality Walktrough Sequences. In Eurographics Workshop on Rendering, pages 13-26. The Eurographics Association.
  17. O'Sullivan, C. (2005). Collisions and Attention. ACM Trans. Appl. Percept., 2(3):309-321.
  18. O'Sullivan, C., Howlett, S., Morvan, Y., McDonnell, R., and O'Conor, K. (2004). Perceptually Adaptive Graphics. In Eurographics 2004, STAR, pages 141- 164. The Eurographics Association.
  19. Snowden, R., Thompson, P., and Troscianko, T. (2006). Basic Vision: an introduction to visual perception. Oxford University Press.
  20. Sundstedt, V. (2007). Rendering and Validation of Graphics using Region-of-Interest. PhD thesis, University of Bristol.
  21. Sundstedt, V., Debattista, K., Longhurst, P., Chalmers, A., and Troscianko, T. (2005). Visual attention for efficient high-fidelity graphics. In SCCG 7805: Proceedings of the 21st spring conference on Computer graphics, pages 169-175, New York, NY, USA. ACM Press.
  22. Ward, G. J. (1994). The RADIANCE lighting simulation and rendering system. In SIGGRAPH 7894: Proceedings of the 21st annual conference on Computer graphics and interactive techniques, pages 459-472, New York, NY, USA. ACM Press.
  23. Woolley, C., Luebke, D., Watson, B., and Dayal, A. (2003). Interruptible rendering. In SI3D 7803: Proceedings of the 2003 symposium on Interactive 3D graphics, pages 143-151, New York, NY, USA. ACM Press.
  24. Yang, X. and Chalmers, A. (2005). Perceptually Driven Level of Detail for Efficient Ray Tracing of Complex Scenes. In Proceedings of Theory and Practice of Computer Graphics 2005, pages 91-96. The Eurographics Association.
  25. Yarbus, A. L. (1967). Eye movements during perception of complex objects. In Eye Movements and Vision, pages 171-196, New York. Plenum Press.
  26. Yee, H., Pattanaik, S., and Greenberg, D. P. (2001). Spatiotemporal sensitivity and visual attention for efficient rendering of dynamic environments. ACM Trans. Graph., 20(1):39-65.
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Paper Citation


in Harvard Style

Sundstedt V. (2008). A PSYCHOPHYSICAL STUDY OF FOVEAL GRADIENT BASED SELECTIVE RENDERING . In Proceedings of the Third International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2008) ISBN 978-989-8111-20-3, pages 207-214. DOI: 10.5220/0001097402070214


in Bibtex Style

@conference{grapp08,
author={Veronica Sundstedt},
title={A PSYCHOPHYSICAL STUDY OF FOVEAL GRADIENT BASED SELECTIVE RENDERING},
booktitle={Proceedings of the Third International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2008)},
year={2008},
pages={207-214},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001097402070214},
isbn={978-989-8111-20-3},
}


in EndNote Style

TY - CONF
JO - Proceedings of the Third International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2008)
TI - A PSYCHOPHYSICAL STUDY OF FOVEAL GRADIENT BASED SELECTIVE RENDERING
SN - 978-989-8111-20-3
AU - Sundstedt V.
PY - 2008
SP - 207
EP - 214
DO - 10.5220/0001097402070214