Hue shifts produced by temporal asymmetries in chromatic signals.
Hue shifts produced by temporal asymmetries in chromatic signals.
复制标题
由色度信号的时间不对称性产生的色调偏移。
DOI：
10.1167/17.9.2
复制
发表时间：
2017
影响因子：
1.8
通讯作者：
Stockman A
中科院分区：
文献类型：
--
作者：
Stockman A
观察者观察M-或L-视锥隔离刺激，并比较相同平均色度和亮度的缓慢开启和缓慢关闭的波形。在6到13 Hz之间，缓慢开启的L-视锥和缓慢关闭的M-视锥闪烁的平均色调看起来更红，而缓慢关闭的L-视锥和缓慢开启的M-视锥闪烁刺激的平均色调看起来更绿-尽管所有波形具有相同的平均值，接近黄色的色度。我们测量了调制深度和斜率的平均色调偏移的时间频率的函数上的效果。结果是复杂的，但表明，辨别力主要取决于波形的二次谐波。我们考虑了几个模型的线性和非线性阶段的组合。首先，我们考虑的模型中，一个非线性阶段限制色调的变化率和限制的陡峭斜率的波形比其浅斜率，从而转移的平均色调的方向较浅的斜率（这种非线性也被称为转换速率限制）。其次，我们考虑了饱和度模型，其中非线性阶段压缩色调信号，从而在非线性之前偏移具有或不具有微分的非对称波形的平均值。总的来说，我们的建模和结果表明，色调偏移发生在一些非线性机制中的色度路径，并且，在各种波形的傅立叶分量方面，非线性的影响关键取决于第二谐波相对于第一谐波的定时。
Observers viewed M-or L-cone-isolating stimuli and compared slowly-on and slowly-off sawtooth waveforms of the same mean chromaticity and luminance. Between 6 and 13 Hz, the mean hue of slowly-on L-cone and slowly-off M-cone sawtooth flicker appeared redder, and the mean hue of slowly-off L-cone and slowly-on M-cone sawtooth stimuli appeared greener—despite all the waveforms' having the same mean, near-yellow-appearing chromaticity. We measured the effect of the modulation depth and the slope of the sawtooth on the mean hue shifts as a function of temporal frequency. The results are complex but show that discriminability depended mainly on the second harmonic of the waveforms. We considered several models with combinations of linear and nonlinear stages. First, we considered models in which a nonlinear stage limits the rate of change of hue and restricts the steep slope of the sawtooth waveform more than its shallow slope, thus shifting the mean hue in the direction of the shallower slope (such a nonlinearity is also known as a slew-rate limit). Second, we considered saturation models in which the nonlinear stage compresses hue signals and thus shifts the mean of asymmetrical waveforms with or without differentiation before the nonlinearity. Overall, our modeling and results suggest that the hue shift occurs at some nonlinear mechanism in the chromatic pathway; and that, in terms of the Fourier components of the various waveforms, the effect of the nonlinearity depends crucially on the timing of the second harmonic relative to the first.
登录
查看更多内容
颜色和亮度在具有扩展和压缩非线性的共同 L 和 M 锥体路径中编码。
影响因子：
1.8
作者：
Stockman A
通讯作者：
Stockman A
人类视觉诱发电位系统的序列分析；
影响因子：
5.2
作者：
D. Reits
通讯作者：
D. Reits
人类视觉中持续和瞬态通道的颜色编码特性
影响因子：
64.8
作者：
D. Tolhurst
通讯作者：
D. Tolhurst
由色度信号中的时间不对称性产生的色调偏移取决于一次和二次谐波的对齐。
影响因子：
1.8
作者：
Stockman A
通讯作者：
Stockman A
新的旋转渐变盘：亮度、闪烁和亮度后效。
影响因子：
1.8
作者：
J. T. Walker
通讯作者：
J. T. Walker