Chang J J, Julesz B
Vision Res. 1983;23(12):1379-85. doi: 10.1016/0042-6989(83)90149-9.
Two-dimensional band-pass filtered random-dot cinematograms were used to study apparent movement mediated by the short-range process. In the first experiment maximum displacement (dmax) for correct direction of movement was measured for symmetrically filtered low-pass, medium-pass, and high-pass images. dmax was found to be limited by the grain size in the image and increased with the target area. Since eccentric presentation had no effect on dmax, the increase of dmax with target area suggests that apparent movement perception is a global process. In the second experiment the stimulus was filtered differentially in the two orthogonal directions using cone filtering. dmax was found to be commensurate with the length of the clusters in the direction of the movement.
使用二维带通滤波随机点电影摄影术来研究由短程过程介导的表观运动。在第一个实验中，测量了对称滤波的低通、带通和高通图像中正确运动方向的最大位移（dmax）。发现dmax受图像中颗粒大小的限制，并随目标区域的增加而增加。由于偏心呈现对dmax没有影响，dmax随目标区域的增加表明表观运动感知是一个全局过程。在第二个实验中，使用锥体滤波在两个正交方向上对刺激进行差异滤波。发现dmax与运动方向上的簇长度相当。
