A Simple Computational Model for the Estimation of Time-to-Collision

It is critical for animals to respond quickly and accurately to avoid looming objects. Recently computation of time-to-collision (TTC) with a looming object have received much attention. TTC can be specified by the optical variable tau ap thetas/thetas', where thetas is the visual angle subtended by the looming object and thetas' is the derivative of thetas over time. The neural mechanisms involved in the computation of tau have been described …