The orientational resolution of human texture perception
The orientational resolution of human texture perception
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DOI：
10.1016/s0042-6989(96)00235-0
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发表时间：
1997-11-01
期刊：
影响因子：
1.8
通讯作者：
Morgan, MJ
中科院分区：
文献类型：
--
作者：
Keeble, DRT;Kingdom, FAA;Morgan, MJ
人类纹理隔离和歧视的一个主要决定因素是所使用的刺激的取向内容。我们已经调查了观察员的能力，以解决在各种纹理的方向域中定义的功能。结果发现，功能必须分开至少13度的主题，以区分取向双峰纹理从相同的方差单峰纹理，对于较大的分离，性能的决定因素是中央的大小的“倾角”的概率密度函数确定双峰纹理。分辨率性能可以通过假设在取向上的过滤过程覆盖双峰纹理中的中心倾角并且区分取决于所得函数中的标准深度来建模。线和Gabor微图案刺激的性能是相似的。(C)1997年爱思唯尔科学有限公司
A major determinant of human texture segregation and discrimination is the orientational content of the stimuli used. We have investigated the ability of observers to resolve features defined in the orientation domain in a variety of textures. It was found that features had to be separated by at least 13 deg for subjects to discriminate orientationally bimodal textures from same-variance unimodal textures, For larger separations, the determinant of performance was the magnitude of the central ''dip'' in the probability density functions determining the bimodal textures. Resolution performance can be modelled by assuming that a filtering process over orientation demodulates the central dip in the bimodal texture and that discrimination depends on criterion depth in the resulting function, Such modelling produces relatively broad estimates of the bandwidth ranging from about 10-20 deg. Performance was similar for both line and Gabor micropattern stimuli. (C) 1997 Elsevier Science Ltd.