Human figures have been animated using a wide variety of geometric models including stick figures, polygonal models, and NURBS-based models with muscles, flexible skin, or clothing. This paper reports on experiments designed to ascertain whether a viewer's perception of motion characteristics is affected by the geometric model used for rendering. Subjects were shown a series of paired motion sequences and asked if the two motions in each pair were "the same" or "different." The two motion sequences in each pair used the same geometric model. For each trial, the pairs of motion sequences were grouped into two sets where one set was rendered with a stick figure model and the other set was rendered with a polygonal model. Sensitivity measures for each trial indicate that for these sequences subjects were better able to discriminate motion variations with the polygonal model than with the stick figure model.

翻译：人体动画采用了多种几何模型，包括线条图、多边形模型以及带有肌肉、柔性皮肤或衣物的NURBS模型。本文报告了一系列实验，旨在探究观察者对运动特征的感知是否受渲染所用几何模型的影响。受试者观看了一系列成对的运动序列，并被要求判断每对中的两个运动是否“相同”或“不同”。每对运动序列使用相同的几何模型。在每次试验中，成对的运动序列被分为两组，其中一组使用线条图模型渲染，另一组使用多边形模型渲染。每次试验的敏感度测量表明，对于这些序列，受试者使用多边形模型比使用线条图模型能更好地区分运动变化。