INTERNATIONAL JOURNAL OF COMPUTER VISION 8:3, PP. ???? , 1992.
COMPUTING MOTION USING ANALOG VLSI VISION CHIPS: AN EXPERIMENTAL COMPARISON AMONG FOUR APPROACHES
HORIUCHI, T., BAIR, W.,BISHOFBERGER, B., MOORE, A., KOCH, C., LAZZARO, J.
We have designed, built and tested a number of analog CMOS VLSI circuits for computing 1-D motion from the time-varying intensity values provided by an array of on-chip phototransistors. we present experimental data for three such circuits and discuss their relative performance. Once circuit approximates the correlation model, one the gradient model, while a third chip uses resistive grids to compute zero-crossings to be tracked over time by a separate digital processor. All circuits integrate image acquisition with image processing functions and compute velocity in real time. Finally, for comparison, we also describe the performance of a simple motion algorithm using off-the-shelf components.
Keywords