Bowns Linda, Beckett Alexander J S
School of Psychology, University of Nottingham, University Park, Nottingham NG7 2RD, UK.
Vision Res. 2010 Jul 9;50(15):1445-51. doi: 10.1016/j.visres.2010.04.003. Epub 2010 Apr 24.
To investigate the independent role of spatial frequency on component motion integration.
Two Type II plaids were presented at varying spatial frequencies. The velocity vectors of the underlying components were constructed so that predicted speed and direction from the components; the Intersection of Constraints; the vector average; and distortion products, remained constant for each of the two plaids across spatial frequency. Perceived direction was measured using a method of adjustment.
Perceived direction changed as a function of spatial frequency, approaching the pattern direction only at spatial frequencies greater than 0.5cpd.
Spatial frequency has an independent effect on the component integration stage that determines perceived pattern motion direction. The results appear to reflect the resolution of orientation for recombination of the components at low spatial frequencies. These results have implications for motion modelling and possible clinical applications.
研究空间频率在成分运动整合中的独立作用。
以不同空间频率呈现两个II型光栅。构建基础成分的速度矢量，以便在不同空间频率下，两个光栅各自的成分预测速度和方向、约束交集、矢量平均值以及失真产物保持恒定。使用调整法测量感知方向。
感知方向随空间频率变化，仅在空间频率大于0.5周/度时接近图案方向。
空间频率在决定感知图案运动方向的成分整合阶段具有独立作用。结果似乎反映了低空间频率下成分重组时方向分辨率的情况。这些结果对运动建模和可能的临床应用具有启示意义。
