Glennerster A
University Laboratory of Physiology, Oxford, U.K.
Vision Res. 1998 Mar;38(6):925-35. doi: 10.1016/s0042-6989(97)00213-7.
The upper displacement limit for motion was compared with the upper disparity limit for stereopsis using two-frame random dot kinematograms or briefly presented stereograms. dmax (the disparity/displacement at which subjects make 20% errors in a forced-choice paradigm) was found to be very similar for motion and stereo at all dot densities, and to fall with increasing dot density (0.006% or two dots to 50%) according to a power law (exponent -0.2). If dmax is limited by the spacing of false targets, this pattern of results suggests that the spatial primitives in the input to the correspondence process may be derived from multiple spatial scales. A model using MIRAGE centroids provides a good fit to the data.
使用双帧随机点运动图或短暂呈现的立体图，将运动的上位移极限与立体视觉的上视差极限进行比较。发现在所有点密度下，dmax（在强制选择范式中受试者出现20%错误时的视差/位移）对于运动和立体视觉非常相似，并且根据幂律（指数为-0.2）随着点密度的增加（从0.006%或每50个点中有两个点到50%）而下降。如果dmax受虚假目标间距的限制，这种结果模式表明对应过程输入中的空间基元可能源自多个空间尺度。使用MIRAGE质心的模型与数据拟合良好。
