Amplitude difference and similar time course of impulse responses in positive- and negative- contrast detection
Amplitude difference and similar time course of impulse responses in positive- and negative- contrast detection
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正对比度和负对比度检测中脉冲响应的幅度差异和相似时间过程
DOI：
10.1016/j.visres.2012.11.006
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发表时间：
2013
期刊：
影响因子：
1.8
通讯作者：
Lin Shi and Keizo Shinomori
中科院分区：
文献类型：
--
作者：
Lin Shi and Keizo Shinomori
测量时间脉冲响应函数（IRF）以研究人类视觉中正对比度和负对比度检测的时间特征。 IRF 是使用 psi 方法测量的连续双脉冲阈值模型来估计的。结果表明，正对比检测的阈值明显高于负对比检测的阈值。然而，除了第一个峰值幅度外，正对比度和负对比度 IRF 相似，反映了源自求和运算而不是视觉系统的线性滤波的灵敏度差异。
Temporal impulse response functions (IRFs) were measured to investigate the temporal characteristics of positive- and negative-contrast detection in human vision. The IRFs were estimated using models from sequential double-pulse thresholds measured by the psi method. The results indicated that thresholds for positive contrast detection were significantly higher than those for negative contrast detection. However, positive- and negative-contrast IRFs were similar except for the first peak amplitude, reflecting the difference in sensitivity that originates from the summation operation rather than the linear filtering of the visual system.