Obscuring Length Changes During Animated Motion
Jason Harrison, Ronald A. Rensink, and Michiel van de Panne; University of British Columbia, Vancouver, BC, Canada.
ACM Transactions on Graphics, 23: 569-573. 2004.
Proceedings of SIGGRAPH 2004.
In this paper we examine to what extent the lengths of the links in
an animated articulated figure can be changed without the viewer
being aware of the change. This is investigated in terms of a framework
that emphasizes the role of attention in visual perception. We
conducted a set of five experiments to establish bounds for the sensitivity
to changes in length as a function of several parameters
and the amount of attention available. We found that while length
changes of 3% can be perceived when the relevant links are given
full attention, changes of over 20% can go unnoticed when attention
is not focused in this way. These results provide general guidelines
for algorithms that produce or process character motion data
and also bring to light some of the potential gains that stand to be
achieved with attention-based algorithms.
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