Convolution, deconvolution, and mean field annealing suitable for analog VLSI

We formulate several standard digital image processing operations as circuits suitable for implementation in real-time analog VLSI, including nonlinear piecewise-constant image restoration using mean field annealing as a global optimization technique. We report test results from an imaging chip that performs user-controlled convolution of the image. We use simulated results for mean field annealing (MFA) in SPICE to show that deconvolution could be implemented by rearranging the subcircuits that perform the corresponding convolution. We report the results of realizing deconvolution in this way on a printed circuit board.