Short-wave cone signal in the red-green detection mechanism.
Short-wave cone signal in the red-green detection mechanism.
复制标题
红绿检测机制中的短波锥体信号。
DOI：
10.1016/s0042-6989(97)00231-9
复制
发表时间：
1998
期刊：
影响因子：
1.8
通讯作者：
Kronauer,RE
中科院分区：
文献类型：
--
作者：
Stromeyer3rd,CF;Chaparro,A;Rodriguez,C;Chen,D;Hu,E;Kronauer,RE
前人的工作表明，红绿(RG)检测机制对相同和相反的长波(L)和中波(M)锥体对比信号具有很高的灵敏度。这一机制在许多条件下调节了红绿色调的判断。我们发现，RG检测机制也接收到支持L信号而同样反对M的短波(S)锥的弱输入，这一点用基座范式进行了证明，在该范式中，微弱的S锥闪烁有助于区分和检测红绿闪烁。此外，接近阈值的+S锥形闪光有助于检测红色闪光并抑制绿色闪光，而接近阈值的S锥形闪光有助于检测绿色闪光并抑制红色闪烁。与L和M的对比体重相比，RG中的S对比权重较小。然而，与其他研究结果的比较表明，绝对S锥对比度对RG检测机制的贡献是S对蓝-黄(BY)检测机制贡献的1 4：1 3。因此，S在RG中的体重是S在BY中体重的一个重要部分。这对“基数”颜色机制具有重要的意义，因为它预测，对于检测或辨别，限制性能的机制不在于等照度颜色平面内的正交M-L和S轴。
Previous work shows that the red-green (RG) detection mechanism is highly sensitive, responding to equal and opposite long-wave (L) and middle-wave (M) cone contrast signals. This mechanism mediates red-green hue judgements under many conditions. We show that the RG detection mechanism also receives a weak input from the short-wave (S) cones that supports the L signal and equally opposes M. This was demonstrated with a pedestal paradigm, in which weak S cone flicker facilitates discrimination and detection of red-green flicker. Also, a near-threshold +S cone flash facilitates detection of red flashes and inhibits green flashes, and a near-threshold —S cone flash facilitates detection of green flashes and inhibits red flashes. The S contrast weight in RG is small relative to the L and M contrast weights. However, a comparison of our results with other studies suggests that the strength of the absolute S cone contrast contribution to the RG detection mechanism is 1 4 to 1 3 the strength of the S contribution to the blue-yellow (BY) detection mechanism. Thus, the S weight in RG is a significant fraction of the S weight in BY. This has important implications for the ‘cardinal’ color mechanisms, for it predicts that for detection or discrimination, the mechanisms limiting performance do not lie on orthogonal M-L and S axes within the equiluminant color plane.