Beutter B R, Mulligan J B, Stone L S
Human and Systems Techologies Branch, NASA Ames Research Center, Moffett Field CA 94035-1000, USA.
Vision Res. 1996 Oct;36(19):3061-75. doi: 10.1016/0042-6989(96)00064-8.
The perceived direction of motion of plaids windowed by elongated spatial Gaussians is biased toward the window's long axis. The bias increases as the relative angle between the plaid motion and the long axis of the window increases, peaks at a relative angle of approximately 45 deg, and then decreases. The bias increases as the window is made narrower (at fixed height) and decreases as the component spatial frequency increases (at fixed aperture size). We examine several models of human motion processing (cross-correlation, motion-energy, intersection-of-constraints, and vector-sum), and show that none of these standard models can predict our data. We conclude that spatial integration of motion signals plays a crucial role in plaid motion perception and that current models must be explicitly expanded to include such spatial interactions.
由细长空间高斯函数开窗的方格图案的运动感知方向偏向于窗口的长轴。随着方格运动与窗口长轴之间的相对角度增加，偏差增大，在相对角度约为45度时达到峰值，然后减小。随着窗口变窄（在固定高度下）偏差增大，而随着分量空间频率增加（在固定孔径大小下）偏差减小。我们研究了几种人类运动处理模型（互相关、运动能量、约束交集和矢量和），并表明这些标准模型都无法预测我们的数据。我们得出结论，运动信号的空间整合在方格运动感知中起着关键作用，并且当前模型必须明确扩展以纳入这种空间相互作用。
