title: Accurate visual measurement of three-dimensional moving patterns.
abstract: Human observers discriminated relative three-dimensional distances in simple patterns of motion parallax with an acuity similar to vernier acuity under comparable conditions. Accurate visual measures of three-dimensional distance can be derived from the structural invariance of patterns undergoing perspective transformations.
mesh_terms: D003867:Depth Perception / Q000502:physiology; D006801:Humans; D009038:Motion; D009039:Motion Perception / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*