PERCEIVED SPEED OF MOVING LINES DEPENDS ON ORIENTATION, LENGTH, SPEED AND LUMINANCE
PERCEIVED SPEED OF MOVING LINES DEPENDS ON ORIENTATION, LENGTH, SPEED AND LUMINANCE
复制标题
DOI：
10.1016/0042-6989(93)90019-s
复制
发表时间：
1993-09-01
期刊：
影响因子：
1.8
通讯作者：
BONNET, C
中科院分区：
文献类型：
--
作者：
CASTET, E;LORENCEAU, J;BONNET, C
在这项研究中，倾斜线水平平移的感知速度（持续时间为167毫秒）相对于经历相同平移的垂直线进行了评估。与垂直线相比，斜线的感知速度被低估了。这种偏置增加：(1)当线进一步倾斜时，(2)线长更大，(3)对比度更低，最后(4)与4.2度/秒的更高速度相比，速度为2.1度/秒。这些结果可以通过考虑视觉系统使用两个速度信号来估计线的速度来解释：这条线的平移（这个信号不依赖于线的方向）和线的运动分量（这个信号依赖于方向）。我们建议这两种信号由不同类型的单元编码，并在行尾特别提取翻译信号。我们进一步建议，根据这些信号的感知显著性，通过加权平均过程来整合这些信号。根据目前处理不同速度信号二维积分的模型，考虑了其他解释。
In this study, the perceived speed of a tilted line translating horizontally (for a duration of 167 msec) is evaluated with respect to a vertical line undergoing the same translation. Perceived speed of the oblique line is shown to be underestimated when compared to the vertical line. This bias increases: (1) when the line is further tilted, (2) with greater line lengths, (3) with lower contrasts, and finally (4) with a speed of 2.1 deg/sec as compared to a higher speed of 4.2 deg/sec. These results may be accounted for by considering that two velocity signals are used by the visual system to estimate the speed of the line: the translation of this line (this signal does not depend on the line's orientation) and the motion component normal to the line (this signal depends on orientation). We suggest that these two signals are encoded by different types of units and that the translation signal is specifically extracted at the line endings. We further suggest that these signals are integrated by a weighted average process according to their perceptual salience. Other interpretations are considered at the light of current models dealing with the two-dimensional integration of different velocity signals.