Barlow H B
Vision Res. 1982;22(6):635-43. doi: 10.1016/0042-6989(82)90099-2.
For colour vision, the task of the eye is to discriminate different distributions of energy over the spectrum. This is usually treated as a problem in the wavelength domain, analogous to treating spatial resolution in terms of spatial positions in the image. What is attempted here is a treatment of colour vision in terms of the system's responses to spectral energy distributions that are sinusoidal functions of wavelength. These are called comb-filtered spectra, and the treatment is analogous to that of spatial vision in terms of spatial sinusoids. This gives some insight into the reasons for trichromacy, the advantages of oil droplets, and the narrow separation of the red and green mechanisms. It is also shown that the absorption spectra of photosensitive pigments are superimposable if plotted as a function of the fourth root of wavelength.
对于色觉而言，眼睛的任务是辨别光谱上不同的能量分布。这通常被视为波长域中的一个问题，类似于从图像中的空间位置角度来处理空间分辨率。这里尝试从系统对作为波长正弦函数的光谱能量分布的响应角度来处理色觉。这些被称为梳状滤波光谱，这种处理方式在空间正弦波方面类似于空间视觉的处理方式。这为三色性的原因、油滴的优势以及红绿色机制的窄间距提供了一些见解。还表明，如果将光敏色素的吸收光谱绘制为波长的四次方根的函数，则它们是可叠加的。
