Anderson A J, Vingrys A J
Department of Optometry and Vision Sciences, University of Melbourne, 3010, Victoria, Australia.
Vision Res. 2000;40(19):2579-88. doi: 10.1016/s0042-6989(00)00121-8.
We investigated the interactions between flicker thresholds and luminance pedestals using threshold versus contrast (TvC) and method of constant stimuli paradigms. High amplitude luminance pedestals were found to elevate flicker thresholds, but low amplitude luminance pedestals were unable to reduce flicker thresholds. Luminance pedestals elevated flicker thresholds more at low temporal frequencies. A simple model based on local light adaptation was able to capture the general form of the TvC functions. Our results suggest that flicker thresholds derived in the presence of a luminance pedestal (luminance-pedestal flicker) may vary from those obtained by modulating about a mean luminance (mean-modulated flicker).
我们使用阈值与对比度（TvC）以及恒定刺激法范式，研究了闪烁阈值与亮度基座之间的相互作用。发现高幅度亮度基座会提高闪烁阈值，但低幅度亮度基座无法降低闪烁阈值。亮度基座在低时间频率下对闪烁阈值的提高作用更大。一个基于局部光适应的简单模型能够捕捉TvC函数的一般形式。我们的结果表明，在存在亮度基座的情况下得出的闪烁阈值（亮度基座闪烁）可能与通过围绕平均亮度进行调制获得的闪烁阈值（平均调制闪烁）有所不同。
