Real-Time Visual Computations Using Analog CMOS Processing Arrays

Integration of photosensors and processing elements provides a mechanism to concurrently perform computations previously intractable in real-time. We have used this approach to model biological early vision processes. A set of VLSI "retina" chips have been fabricated, using large scale analog circuits (over lOOK transistors in total). Analog processing provides sophisticated, compact functional elements, and avoids some of the aliasing problems encountered in conventional sampled-data artificial vision systems.