Myers K J, Barrett H H
Department of Radiology, University of Arizona, Tucson 85724.
J Opt Soc Am A. 1987 Dec;4(12):2447-57. doi: 10.1364/josaa.4.002447.
Several authors have measured the detection ability of human observers for objects in correlated (nonwhite) noise. These studies have shown that the human observer has approximately constant efficiency when compared with a nonprewhitening ideal observer. In this paper we add a frequency-selective mechanism to the ideal-observer model, similar to the channel mechanism that has been demonstrated through experiments that measure a subject's ability to detect grating stimuli. For a number of detection and discrimination tasks, the nonprewhitening ideal-observer model and the channelized ideal-observer model yield similar performance predictions. Thus both models seem equally capable of explaining a considerable body of psychophysical data, and it would be difficult to devise an experiment to determine which model is more nearly correct.
几位作者测量了人类观察者在相关（非白）噪声中对物体的检测能力。这些研究表明，与未进行白化处理的理想观察者相比，人类观察者具有大致恒定的效率。在本文中，我们在理想观察者模型中添加了一种频率选择机制，类似于通过测量受试者检测光栅刺激能力的实验所证明的通道机制。对于许多检测和辨别任务，未进行白化处理的理想观察者模型和通道化理想观察者模型产生相似的性能预测。因此，这两种模型似乎同样能够解释大量的心理物理学数据，并且很难设计一个实验来确定哪种模型更接近正确。
