Color and brightness encoded in a common L- and M-cone pathway with expansive and compressive nonlinearities.
Color and brightness encoded in a common L- and M-cone pathway with expansive and compressive nonlinearities.
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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。
DOI：
10.1167/14.3.1
复制
发表时间：
2014
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
翻译后摘要：闪烁时，560 nm附近的抽象光显得更亮，而520或650 nm附近的光显得更黄。这两种效果是一致的信号失真内的视觉通路的亮度变化在一个膨胀的非线性，和色调偏移在压缩。我们以前操纵每个非线性产生的失真产品，以提取信号亮度和颜色之前（早期阶段）和之后（晚期阶段）每个非线性的L-和M-锥通路的阶段的时间特性。我们发现，早期和晚期阶段的衰减特性在两个路径中几乎是相同的：早期的时间阶段的行为像一个带通滤波器峰值在10-15 Hz，而后期的行为像低通滤波器的截止频率接近3 Hz。我们提出了一个生理相关的模型，占过滤器的形状，并结合了一个共同的小细胞通路内的非线性。早期带通滤波器的形状与中心信号和更缓慢和延迟的环绕信号之间的对抗一致，而晚期滤波器与简单的两级低通滤波器一致。建模表明，亮度变化和色调偏移最初都是由半波整流和信号划分为ON和OFF分量引起的。然而，色调偏移可能是由压缩彩色红色和绿色信号的后期非线性的附加效应引起的。扩张性半波整流非线性的合理位置在周围拮抗之后，可能来自水平细胞，但压缩非线性可能在后期滤波器之后。
Abstract:Abstract Lights near 560 nm appear brighter when flickered, whereas lights near 520 or 650 nm appear yellower. Both effects are consistent with signal distortion within the visual pathway—brightness changes at an expansive nonlinearity, and hue shifts at a compressive one. We previously manipulated the distortion products generated by each nonlinearity to extract the temporal properties of stages of the L-and M-cone pathways that signal brightness and color before (early stages) and after (late stages) each nonlinearity. We find that the attenuation characteristics of the early and late stages are virtually identical in both pathways: The early temporal stage acts like a band-pass filter peaking at 10–15 Hz, while the late stage acts like low-pass filter with a cut-off frequency near 3 Hz. We propose a physiologically relevant model that accounts for the filter shapes and incorporates both nonlinearities within a common parvocellular pathway. The shape of the early band-pass filter is consistent with antagonism between center signals and more sluggish and delayed surround signals, while the late filter is consistent with a simple two-stage low-pass filter. Modeling suggests that the brightness change and hue shift are both initially caused by the half-wave rectification and partition of signals into ON and OFF components. However, the hue shift is probably caused by the additional effects of a later nonlinearity that compresses chromatic red and green signals. Plausible sites for the expansive half-wave rectifying nonlinearity are after surround antagonism, possibly from horizontal cells, but the compressive nonlinearity is likely to be after the late filter.
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DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
C. Frey
通讯作者：
C. Frey
表示亮度信号的 L 和 M 视锥细胞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
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
影响因子：
15.9
作者：
P. Lennie
通讯作者：
P. Lennie
一只眼睛间歇性刺激另一只眼睛稳定刺激时的亮度比较
DOI：
--
发表时间：
1952
期刊：
影响因子：
--
作者：
S. H. Bartley
通讯作者：
S. H. Bartley