UC Irvine

To determine whether the spatial disorder of human photoreceptors is sufficient to prevent aliasing distortion, optical transform techniques were used to compute the power spectrum of a 12′ × 13′ array of foveal cones treated as sampling points and also the post-sampling spectra of gratings at spatial frequencies above (80 c/deg) and below (30 c/deg) the nominal Nyquist frequency for this array. No trace of aliasing was observed in the spectrum of the sampled 80 c/deg grating. The conclusion is that spatial disorder in foveal receptor placement allows alias-free sampling without introducing any appreciable spatial noise.