Optical Associative Memory Using Optoelectronic Neurochips for Image Processing (Special Issue on Optical Interconnection)

概要

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This paper presents a novel model of optical associative memory using an optoelectronic neurochips, which detects and processes a two-dimensional input image at the same time. The original point of this model is that the optoelectronic neurochips allow direct image processing in terms of parallel input/output interface and parallel neural processing. The operation principle is based on the nonlinear transformation of the input image to the corresponding the point attractor of a fully connected neural network. The learning algorithm is the simulated annealing and the energy of the network state is used as its cost function. The computer simulations show its usefulness and that the maximum number of stored images is 150 in the network with 64 neurons. Moreover, we experimentally demonstrate an optical implementation of the model using the optoelectronic neurochip. The chip consists of two-dimensional array of variable sensitivity photodetectors with 8×16 elements. The experimental results shows that 3 images of size 8×8 were successfully stored in the system. In the case of the input image of size 64×64, the estimated processing speed is 100 times higher than that of the conventional optoelectronic neurochips.
社団法人電子情報通信学会の論文
1994-01-25