Animals that rely on visual information for navigation and orientation must resolve relative depth relationships from two-dimensional projections of the visual field. Different organisms extract depth information using a variable set of monocular and binocular visual cues. We have computationally modeled two identified systems on the neuronal level; a monocular system identified in the hawkmoth (Manduca sexta) and a binocular system identified in the primary visual cortex of primates. The performance capabilities of the models were tested in closed loop tracking simulations and evaluated with respect to their accuracy and computational efficiency.
Lise A. Johnson and C. M. Higgins, "Insect Inspired Looming-Based Depth Estimation" (poster), 3rd Gordon Conference on Neuroethology, Magdalen College, Oxford University, UK, August 2005.