Williams D R, Collier R
Science. 1983 Jul 22;221(4608):385-7. doi: 10.1126/science.6867717.
The short wavelength color mechanism in the human visual system can distinguish gratings from uniform fields of the same average radiance at spatial frequencies that are twice as high as the highest at which it can resolve bars in the grating. This discrimination above the resolution limit is associated with a splotchy or mottled appearance of the grating similar to two-dimensional noise. The most plausible explanation for the mottled pattern is that it is a moiré pattern produced by aliasing (spatial undersampling) by an irregular and sparse mosaic of short wavelength cones.
人类视觉系统中的短波颜色机制能够在空间频率上区分光栅和具有相同平均辐射率的均匀场，该空间频率是其分辨光栅中条纹的最高空间频率的两倍。这种高于分辨率极限的辨别与光栅的斑点状或斑驳状外观有关，类似于二维噪声。对于这种斑驳图案最合理的解释是，它是由短波锥体的不规则且稀疏镶嵌所导致的混叠（空间欠采样）产生的莫尔条纹图案。
