Visual Representations Embodying Spacetime Structure

If one defines a visual front-end to be that part of a visual system in which the structure of the optical world is represented in some least committed form, then it is plausible to assert that it reflects the structural properties, notably symmetries, of the optical environment. We propose a methodology for constructing receptive field assemblies consistent with these symmetries, which contributes to our understanding of the visual front-end in a predictive and retrodictive way.