Simulating a function of visual peripheral processes with an analog VLSI network

A two-dimensional analog VLSI network for implementing a function of motion perception during the peripheral process is described. The network contains many nodes, or processing elements (PEs), which operate concurrently in asynchronous fashion. Each PE performs an image-difference operation as well as thresholding to extract motion information on a pixel-by-pixel basis. Analog voltage, which interacts extremely quickly, implements all computations. An energy equilibrium state of the network provides stabilized analog voltage across the network. SPICE simulations and experiments using real images verify the results of the theoretical analysis.<>