Visual search: The role of peripheral information measured using gaze-contingent displays
Visual search: The role of peripheral information measured using gaze-contingent displays
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DOI：
10.1167/6.9.1
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发表时间：
2006-01-01
影响因子：
1.8
通讯作者：
Najemnik, Jiri
中科院分区：
文献类型：
--
作者：
Geisler, Wilson S.;Perry, Jeffrey S.;Najemnik, Jiri
两个因素限制了对视觉搜索机制的理解，这两个因素是当眼睛自由移动时难以控制和操纵视网膜刺激，以及缺乏理想的观察者理论用于搜索过程中的注视选择。最近，我们开发了一种方法来精确地控制视网膜刺激与凝视特遣队显示器（J。佩里& W. S. Geisler，2002），并且我们推导出视觉搜索中的最佳眼动理论（J. Najemnik & W. S. Geisler，2005）。在这里，我们报告了一个参数研究的视觉搜索正弦波目标添加到空间噪声背景，具有类似于自然图像的频谱特性（噪声的幅度谱福尔斯下降与空间频率成反比）。搜索时间，搜索精度，和眼睛的固定作为目标的空间频率，1/f噪声对比度的函数进行测量，从固定点的显示器的分辨率下降。两个观察者的结果是系统的和相似的。我们发现，搜索性能和眼球运动模式的许多方面是类似的理想的视网膜具有相同的衰减分辨率与视网膜偏心作为人类视觉系统。
Two of the factors limiting progress in understanding the mechanisms of visual search are the difficulty of controlling and manipulating the retinal stimulus when the eyes are free to move and the lack of an ideal observer theory for fixation selection during search. Recently, we developed a method to precisely control retinal stimulation with gaze-contingent displays (J. S. Perry & W. S. Geisler, 2002), and we derived a theory of optimal eye movements in visual search ( J. Najemnik & W. S. Geisler, 2005). Here, we report a parametric study of visual search for sine-wave targets added to spatial noise backgrounds that have spectral characteristics similar to natural images ( the amplitude spectrum of the noise falls inversely with spatial frequency). Search time, search accuracy, and eye fixations were measured as a function of target spatial frequency, 1/f noise contrast, and the resolution falloff of the display from the point of fixation. The results are systematic and similar for the two observers. We find that many aspects of search performance and eye movement pattern are similar to those of an ideal searcher that has the same falloff in resolution with retinal eccentricity as the human visual system.