DISCRIMINATION OF SPEED DISTRIBUTIONS - SENSITIVITY TO STATISTICAL PROPERTIES
DISCRIMINATION OF SPEED DISTRIBUTIONS - SENSITIVITY TO STATISTICAL PROPERTIES
复制标题
DOI：
10.1016/0042-6989(95)00057-7
复制
发表时间：
1995-11-01
期刊：
影响因子：
1.8
通讯作者：
ANDERSEN, GJ
中科院分区：
文献类型：
--
作者：
ATCHLEY, P;ANDERSEN, GJ
进行了两个实验，检验人类观察者检测速度分布统计特性差异的能力。在第一个实验中，对一个统计矩（均值、方差、偏度或峰度）的值进行了操作，而其他统计矩保持不变；受试者的任务是确定四个速度分布中哪一个包含不同的值，在第二个实验中，只检查后三个时刻，使用了类似的程序，但每次试验后都会给出反馈，以最大限度地提高观察者的表现。两个实验的结果表明，人类观察者可以可靠地检测到速度分布中均值和方差信息的差异。研究结果对图像分割和光流方向检测具有重要意义。
Two experiments examining the ability of human observers to detect differences in the statistical properties underlying velocity distributions were conducted. A four-alternative forced-choice methodology, using four simultaneous velocity distributions, was used in both experiments, In the first experiment the value of one statistical moment (mean, variance, skewness, or kurtosis) was manipulated while the others were held constant; The subjects task was to determine which of four velocity distributions contained the dissimilar value, In the second experiment only the latter three moments were examined, A similar procedure was used, however feedback was given after each trial to maximize observer performance, The results from both experiments indicate that human observers can reliably detect differences in both mean and variance information underlying velocity distributions. The results of this research has important implications for image segmentation and the detection of heading from optic flow.