Can we distinguish biological motions of virtual humans?: perceptual study with captured motions of weight lifting

Perception of biological motions is a key issue in order to evaluate the quality and the credibility of motions of virtual humans. This paper presents a perceptual study to evaluate if human beings are able to accurately distinguish differences in natural lifting motions with various masses in virtual environments (VE), which is not the case. However, they reached very close levels of accuracy when watching to computer animations compared to videos. Still, quotes of participants suggest that the discrimination process is easier in videos of real motions which included muscles contractions, more degrees of freedom, etc. These results can be used to help animators to design efficient physically-based animations.

[1]  Andrew P. Witkin,et al.  Spacetime constraints , 1988, SIGGRAPH.

[2]  Henrik Olsson,et al.  Visual perception of dynamic properties: cue heuristics versus direct-perceptual competence. , 2000, Psychological review.

[3]  Thanh Giang,et al.  Evaluating the visual fidelity of physically based animations , 2003, ACM Trans. Graph..

[4]  Lucas Kovar,et al.  Motion graphs , 2002, SIGGRAPH '08.

[5]  Michael Gleicher,et al.  Motion editing with spacetime constraints , 1997, SI3D.

[6]  S PollardNancy,et al.  Perceptual metrics for character animation , 2003 .

[7]  K HodginsJessica,et al.  Perception of Human Motion With Different Geometric Models , 1998 .

[8]  G. Johansson.  Visual perception of biological motion and a model for its analysis , 1973 .

[9]  G. Bingham,et al.  Kinematic form and scaling: further investigations on the visual perception of lifted weight. , 1987, Journal of experimental psychology. Human perception and performance.

[10]  Paul S. A. Reitsma,et al.  Effect of scenario on perceptual sensitivity to errors in animation , 2008, APGV '08.

[11]  P. Juslin,et al.  Visual perception of dynamic properties: cue heuristics versus direct-perceptual competence. , 2000, Psychological review.

[12]  David A. Forsyth,et al.  Pushing people around , 2005, SCA '05.

[13]  Taku Komura,et al.  Perception Based Real-Time Dynamic Adaptation of Human Motions , 2010, MIG.

[14]  Jessica K. Hodgins,et al.  Analyzing the physical correctness of interpolated human motion , 2005, SCA '05.

[15]  S. Runeson,et al.  Visual perception of lifted weight. , 1981, Journal of experimental psychology. Human perception and performance.

[16]  Nancy S. Pollard,et al.  Perceptual metrics for character animation: sensitivity to errors in ballistic motion , 2003, ACM Trans. Graph..