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Several research groups are implementing analog integrated circuit models of biological auditory processing. The outputs of these circuit models have taken several forms, including video format for monitor display, simple scanned output for oscilloscope display, and parallel analog outputs suitable for data-acquisition systems. Here, an alternative output… (More)
Acknowledgments I am greatly indebted to Carver Mead, whose unfailing support and guidance through the long years made this work possible. His insight and encouragement were critical components in the process of my learning to do research. The environment that he created for his students was rich and fertile; in leading by example, Carver is a role model… (More)
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All rights reserved iii Acknowledgments I thank my adviser, Professor John Hoppeld, for providing an excellent e n vironment for academic pursuit. I thank Professor Carver Mead for introducing me to the power of Analog VLSI as a means for performing highly parallel, low-power computations. I thank Kwabena Buster" Boahen for showing me the elegance and… (More)
All rights reserved iii Acknowledgments Thanks to Christof for many things, especially for his rapid-re ideas and the constant enthusiasm he exudes. Thanks also to the rest of Koch Lab for help and comfort over the years. Intelligence Center. Thanks also to the Hughes AI Center for supporting me with a fellowship during my years at Caltech. Of course, none… (More)
We describe two successfully working, analog VLSI vision circuits that move beyond pixel-based early vision algorithms. One circuit, implementing the dynamic wires model, provides for dedicated lines of communication among groups of pixels that share a common property. The chip uses the dynamic wires model to compute the arclength of visual contours.… (More)