Hue shifts produced by temporal asymmetries in chromatic signals depend on the alignment of the first and second harmonics.
Hue shifts produced by temporal asymmetries in chromatic signals depend on the alignment of the first and second harmonics.
复制标题
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。
DOI：
10.1167/17.9.3
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
当M锥或L锥隔离锯齿波在4~13.3赫兹之间闪烁时，沿浅锯齿斜率方向有平均色调漂移。在这里，我们研究这种位移如何依赖于锯齿状波形的一次和二次谐波的排列。在4赫兹以下，观察者可以跟踪由这两种谐波引起的色调变化，并可靠地匹配微红和微绿的偏移。然而，在较高的频率下，色调变化表现为叠加在稳定光上的彩色闪烁，其平均色调随二次谐波排列而变化。观察者可以将此平均色调与可变占空比的矩形波形进行匹配，并分别设置平均色调在微红和微绿之间翻转的对齐。最大色调漂移大致与频率无关，当第一次和第二次谐波的波峰或波谷大致与视觉输入对齐时-与色调漂移由早期瞬时非线性引起的色调漂移一致，这种非线性饱和了较大的色调漂移。然而，这些预测忽略了在其输入和产生色调偏移的非线性之间的色度路径中引入的相位延迟。如果非线性遵循色度时间对比度灵敏度函数所隐含的实质性滤波，则相位延迟将改变第一次和第二次谐波的对准，使得在非线性时，产生最大色调移位的波形很可能是那些在上升和下降斜率上具有最大差异的波形--与色调移位是由限制色调变化速率的中心非线性引起的一致。
When M-or L-cone-isolating sawtooth waveforms flicker at frequencies between 4 and 13.3 Hz, there is a mean hue shift in the direction of the shallower sawtooth slope. Here, we investigate how this shift depends on the alignment of the first and second harmonics of sawtooth-like waveforms. Below 4 Hz, observers can follow hue variations caused by both harmonics, and reliably match reddish and greenish excursions. At higher frequencies, however, the hue variations appear as chromatic flicker superimposed on a steady light, the mean hue of which varies with second-harmonic alignment. Observers can match this mean hue against a variable-duty-cycle rectangular waveform and, separately, set the alignment at which the mean hue flips between reddish and greenish. The maximum hue shifts were approximately frequency independent and occurred when the peaks or troughs of the first and second harmonics roughly aligned at the visual input—consistent with the hue shift's being caused by an early instantaneous nonlinearity that saturates larger hue excursions. These predictions, however, ignore phase delays introduced within the chromatic pathway between its input and the nonlinearity that produces the hue shifts. If the nonlinearity follows the substantial filtering implied by the chromatic temporal contrast-sensitivity function, phase delays will alter the alignment of the first and second harmonics such that at the nonlinearity, the waveforms that produce the maximum hue shifts might well be those with the largest differences in rising and falling slopes—consistent with the hue shift's being caused by a central nonlinearity that limits the rate of hue change.
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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
信号颜色的 L 和 M 锥体通路早期和晚期的时间特征。
影响因子：
1.8
作者：
Petrova D
通讯作者：
Petrova D
影响因子：
1.8
作者：
C. E. Sternheim;C. Stromeyer;M. C. Khoo
通讯作者：
M. C. Khoo
影响因子：
1.8
作者：
REGAN, D;TYLER, CW
通讯作者：
TYLER, CW