Osorio D, Ruderman D L, Cronin T W
School of Biological Sciences, Sussex University, Brighton, UK.
J Opt Soc Am A Opt Image Sci Vis. 1998 Jan;15(1):16-22. doi: 10.1364/josaa.15.000016.
Both long-wavelength-sensitive (L) and medium-wavelength-sensitive (M) cones contribute to luminance mechanisms in human vision. This means that luminance and chromatic signals may be confounded. We use power spectra from natural images to estimate the magnitude of the corruption of luminance signals encoded by an array of retinal ganglion cells resembling the primate magnocellular neurons. The magnitude of this corruption is dependent on the cone lattice and is most severe where cones form clumps of a single spectral type. We find that chromatic corruption may equal or exceed the amplitude of other sources of noise and so could impose constraints on visual performance and on eye design.
长波长敏感（L）锥体和中波长敏感（M）锥体都对人类视觉中的亮度机制有贡献。这意味着亮度和色度信号可能会相互混淆。我们利用自然图像的功率谱来估计由一组类似于灵长类大细胞神经元的视网膜神经节细胞编码的亮度信号的受损程度。这种受损程度取决于锥体晶格，并且在锥体形成单一光谱类型的团块处最为严重。我们发现色度受损可能等于或超过其他噪声源的幅度，因此可能会对视觉性能和眼睛设计施加限制。
