Fukuda Kazuho, Kaneko Hirohiko, Matsumiya Kazumichi
Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Kanagawa 226-8503, Japan.
Vision Res. 2006 Sep;46(17):2749-56. doi: 10.1016/j.visres.2006.02.016. Epub 2006 Apr 5.
We investigated temporal properties of vertical-size and horizontal-size disparity processing for slant perception. Subjects indicated perceived slants for a stereoscopic stimulus in which the two magnitudes of vertical-size or horizontal-size disparities were oscillated stepwise with various frequencies (from 0.2 to 10 Hz). For the stimulus with vertical-size disparity oscillation, two slants corresponding to the two magnitudes of disparity were perceived for low-frequency conditions, whereas only a static mean slant of the two slants was perceived for high frequencies (5 and 10 Hz). For the stimulus with horizontal-size disparity oscillation, two slants were perceived for all the temporal frequency conditions. These results indicate that temporal properties of vertical- and horizontal-size disparity processing are clearly different and vertical-size disparities are temporally integrated over a period of around 500 ms for slant perception.
我们研究了用于倾斜感知的垂直大小和水平大小视差处理的时间特性。受试者指出了立体刺激的感知倾斜度，其中垂直大小或水平大小视差的两个量级以各种频率（从0.2到10Hz）逐步振荡。对于具有垂直大小视差振荡的刺激，在低频条件下感知到对应于两个视差量级的两个倾斜度，而在高频（5和10Hz）下仅感知到这两个倾斜度的静态平均倾斜度。对于具有水平大小视差振荡的刺激，在所有时间频率条件下都感知到两个倾斜度。这些结果表明，垂直和水平大小视差处理的时间特性明显不同，并且垂直大小视差在大约500毫秒的时间段内进行时间整合以进行倾斜感知。
