title: On the efficient two-dimensional energy coding characteristics of spatial vision.
abstract: Recent evidence indicates that the vertebrate visual system possesses units whose receptive fields may be represented as narrow-band orientation and frequency specific filters. It has been indirectly demonstrated that equivalent psychophysical units act in such a way as to not discriminate the individual frequency components within each frequency band. Here we directly demonstrate this to be the case with digital images and so show an efficient energy code for spatial vision.
mesh_terms: D004192:Discrimination, Psychological; D005583:Fourier Analysis; D006801:Humans; D012399:Rotation; D013028:Space Perception / Q000502:physiology*