对空间频率调制敏感的二阶视觉滤波器的特性
Features of the second-order visual filters sensitive to the spatial frequency modulations
摘要：
我们研究了二阶视觉滤波器对空间频率（SF）调制方向和调制SF敏感的选择性。我们采用掩蔽范式进行了心理物理实验。发现二阶滤波器对调制的SF（带宽为+1.5倍频程）具有选择性，并且对调制的取向不显示任何选择性。我们假设二阶机制的感受野具有同心圆形状。
英文摘要：
We investigated selectivity of 2nd order visual filters sensitive to the spatial frequency (SF) modulations to orientation and to SF of modulation. We carried out psychophysical experiment using masking paradigm. It was found that 2nd order filters are selective to SF of modulation (with bandwidth +1.5 octaves), and do not show any selectivity to orientation of modulation. We suppose receptive fields of 2nd order mechanisms have concentric form.
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