Evaluating the plausibility of edited throwing animations
Pages 175 - 182
Abstract
Animation budget constraints during the development of a game often call for the use of a limited set of generic motions. Editing operations are thus generally required to animate virtual characters with a sufficient level of variety. Evaluating the perceptual plausibility of edited animations can therefore contribute greatly towards producing visually plausible animations. In this paper we study observers' sensitivity to manipulations of overarm and underarm biological throwing animations. In our first experiment, we used Dynamic Time Warping to edit the biological throwing motions, and modified the release velocity of the ball accordingly. We found that observers are more tolerant to speeding up of the original throwing motion than to slowing down, and that slowed down underarm throws are perceived as particularly unnatural. In our second experiment, we modified separately horizontal and vertical components of the release velocity of the ball, while leaving the motion of the thrower unchanged. We found that observers are more sensitive to manipulations of the horizontal component in overarm throws, and of the vertical component in underarm throws. As in the first experiment, we found that observers are most disturbed by decreases in the velocity of the ball in underarm throws. Our results provide valuable insights for developers of games and VR applications by specifying thresholds for the perceptual plausibility of throwing manipulations.
Supplementary Material
References
[1]
{BHW96} Barzel R., Hughes J. F., Wood D. N.: Plausible motion simulation for computer graphics animation. In Proceedings of the Eurographics Workshop on Computer Animation and Simulation (1996), Springer-Verlag. 1, 2
[2]
{Boz59} Bozzi P.: Analisi fenomenologica del moto pendolare armonico. Rivista di Psicologia 52, 4 (1959), 281--302. 1
[3]
{BW95} Bruderlin A., Williams L.: Motion signal processing. Proceedings of ACM SIGGRAPH 1995 (1995), 97--104. 3
[4]
{CHK07} Chaminade T., Hodgins J., Kawato M.: Anthropomorphism influences perception of computer-animated characters' actions. Social Cognitive and Affective Neuroscience 2, 3 (2007), 206--216. 2
[5]
{Cle82} Clement J.: Students' preconceptions in introductory mechanics. American Journal of Physics 50, 1 (1982), 66--71. 2
[6]
{Cor62} Cornsweet T. N.: The staircase method in psychophysics. American Journal of Psychology 75, 3 (1962), 485--491. 4
[7]
{FHW11} Fr�nd I., Haenel N. V., Wichmann F. A.: Inference for psychometric functions in the presence of nonstationary behavior. Journal of Vision 11, 6 (2011). 5
[8]
{Gle97} Gleicher M.: Motion editing with spacetime constraints. Proceedings of I3D 1997 (1997), 139--ff. 2
[9]
{Gle98} Gleicher M.: Retargetting motion to new characters. Proceedings of SIGGRAPH 1998 (1998), 33--42. 2
[10]
{Gle01} Gleicher M.: Motion path editing. In Proceedings of I3D 2001 (2001), pp. 195--202. 2
[11]
{GP01} Garc�a-P�rez M. A.: Yes-no staircases with fixed step sizes: psychometric properties and optimal setup. Optometry and vision science official publication of the American Academy of Optometry 78, 1 (2001), 56--64. 4
[12]
{HB00} Hecht H., Bertamini M.: Understanding projectile acceleration. Journal of Experimental Psychology: Human Perception and Performance 26, 2 (2000), 730--746. 2
[13]
{HMO12} Hoyet L., McDonnell R., O'Sullivan C.: Push it real: Perceiving causality in virtual interactions. To appear in the Proceedings of ACM SIGGRAPH 2012 (2012). 1, 2
[14]
{HRMO12} Hoyet L., Ryall K., McDonnell R., O'Sullivan C.: Sleight of hand: perception of finger motion from reduced marker sets. Proceedings of I3D 2012 (2012), 79--86. 3
[15]
{KF01} Knoblich G., Flach R.: Predicting the effects of actions: Interactions of perception and action. Psychological Science 12, 6 (2001), 467--472. 2
[16]
{KPWH92} Kaiser M. K., Proffitt D. R., Whelan S., Hecht H.: Influence of animation on dynamical judgments. Journal of Experimental Psychology: Human Perception and Performance 18, 3 (1992), 669--689. 2
[17]
{LHP06} Liu C. K., Hertzmann A., Popović Z.: Composition of complex optimal multi-character motions. Proceedings of SCA 2006 (2006), 215--222. 2
[18]
{MCG80} McCloskey M., Caramazza A., Green B.: Curvilinear motion in the absence of external forces: Naïve beliefs about the motion of objects. Science 210, 4474 (1980), 1139--1141. 1, 2
[19]
{MF07} Majkowska A., Faloutsos P.: Flipping with physics: motion editing for acrobatics. Proceedings of SCA 2007 (2007), 35--44. 2
[20]
{MHH10} Munzert J., Hohmann T., Hossner E.: Discriminating throwing distances from point-light displays with masked ball flight. European Journal of Cognitive Psychology 22, 2 (2010), 247--264. 2
[21]
{NLB*07} Nusseck M., Lagarde J., Bardy B., Fleming R., Bülthoff H. H.: Perception and prediction of simple object interactions. Proceedings of APGV 2007 (2007), 27--34. 2
[22]
{ODGK03} O'Sullivan C., Dingliana J., Giang T., Kaiser M. K.: Evaluating the visual fidelity of physically based animations. ACM Trans. Graph. 22, 3 (2003), 527--536. 1, 2
[23]
{RAP08} Reitsma P. S. A., Andrews J., Pollard N. S.: Effect of character animacy and preparatory motion on perceptual magnitude of errors in ballistic motion. Comput. Graph. Forum 27, 2 (2008), 201--210. 1, 2, 6, 7
[24]
{RF83} Runeson S., Frykholm G.: Kinematic specification of dynamics as an informational basis for person-and-action perception: Expectation, gender recognition, and deceptive intention. Journal of Experimental Psychology: General 112, 4 (1983), 585--615. 2
[25]
{RO09} Reitsma P. S. A., O'Sullivan C.: Effect of scenario on perceptual sensitivity to errors in animation. ACM Trans. Appl. Percept. 6, 3 (2009), 15:1--15:16. 1, 2
[26]
{SKG03} Shin H. J., Kovar L., Gleicher M.: Physical touch-up of human motions. Proceedings of Pacific Graphics 2003 (2003), 194--. 2
[27]
{SO06} Shin H. J., Oh H. S.: Fat graphs: constructing an interactive character with continuous controls. Proceedings of SCA 2006 (2006), 291--298. 2
[28]
{YRPF09} Yeh T. Y., Reinman G., Patel S. J., Faloutsos P.: Fool me twice: Exploring and exploiting error tolerance in physics-based animation. ACM Trans. Graph. 29, 1 (2009), 5:1--5:11. 1
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- SIGGRAPH: ACM Special Interest Group on Computer Graphics and Interactive Techniques
- EUROGRAPHICS: The European Association for Computer Graphics
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Eurographics Association
Goslar, Germany
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Published: 29 July 2012
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SCA '12
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- SIGGRAPH
- EUROGRAPHICS
SCA '12: The ACM SIGGRAPH / Eurographics Symposium on Computer Animation
July 29 - 31, 2012
Lausanne, Switzerland
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SCA '12 Paper Acceptance Rate 27 of 80 submissions, 34%;
Overall Acceptance Rate 183 of 487 submissions, 38%
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