Measuring perceived differences in surface texture due to changes in higher order statistics
Measuring perceived differences in surface texture due to changes in higher order statistics
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DOI：
10.1364/josaa.27.001232
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发表时间：
2010-05-01
影响因子：
1.9
通讯作者：
Clarke, A. D. F.
中科院分区：
文献类型：
--
作者：
Emrith, K.;Chantler, M. J.;Clarke, A. D. F.
我们研究了人类感知表面纹理图像外观变化的能力，这些变化是由其高阶统计量的变化引起的。我们在保持一阶和二阶统计量不变的同时，递增地随机化它们的相位谱，以确保外观的变化仅仅是由于三阶和其他更高阶统计量的变化。刺激既包括自然生成的自然图像，也包括合成生成的自然图像，后者用于防止观察者进行像素级的比较。每个观察者的感知尺度与随机化程度呈S型关系。观察者对20%-60%随机化范围内的变化最敏感。为了解释这一行为，我们提出了一个生物学上可信的模型，该模型计算了相位一致性的局部测量的方差。(C)2010年美国光学学会
We investigate the ability of humans to perceive changes in the appearance of images of surface texture caused by the variation of their higher order statistics. We incrementally randomize their phase spectra while holding their first and second order statistics constant in order to ensure that the change in the appearance is due solely to changes in third and other higher order statistics. Stimuli comprise both natural and synthetically generated naturalistic images, with the latter being used to prevent observers from making pixel-wise comparisons. A difference scaling method is used to derive the perceptual scales for each observer, which show a sigmoidal relationship with the degree of randomization. Observers were maximally sensitive to changes within the 20%-60% randomization range. In order to account for this behavior we propose a biologically plausible model that computes the variance of local measurements of phase congruency. (C) 2010 Optical Society of America