Hess R F, Bex P J, Fredericksen E R, Brady N
McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada.
Vision Res. 1998 Jan;38(2):259-66. doi: 10.1016/s0042-6989(97)00128-4.
Two recent versions of a single channel model of motion perception have had impressive success in explaining direction discrimination by human observers for spatially filtered noise images in two-flash apparent motion. It has been argued that the dramatic breakdown in motion perception which occurs when one image in the two-flash sequence is low-pass filtered can be explained only by a single channel model. We show that neither version of the single channel model which has been proposed can explain performance for noise images chosen to provide comparable stimulation in the spatial channels known to subserve human vision. A multi-channel model of motion perception has little difficulty in explaining these results.
运动知觉单通道模型的两个最新版本在解释人类观察者对双闪表观运动中空间滤波噪声图像的方向辨别方面取得了令人瞩目的成功。有人认为，当双闪序列中的一幅图像进行低通滤波时出现的运动知觉的显著崩溃，只能用单通道模型来解释。我们表明，已提出的单通道模型的两个版本都无法解释为在已知服务于人类视觉的空间通道中提供可比刺激而选择的噪声图像的性能。运动知觉的多通道模型在解释这些结果方面几乎没有困难。
