<title>Optoelectronic system of digital holographic image processing</title>

Abstract

Analog optical coherent information processing systems have rather limited application, mainly for problems of radar image visualization with synthesized aperture. At the same time their resources are much wider, and are not reduced only to Fourier transform of large data array. There are a lot of investigations,showing principal possibility to perform by means of such methods a wide class of calculations: starting from texture and image analysis and recognition' and up to different integral transforms2 and solving differential equations.3 Unfortunately, these ideas do not find adequate implementation in intellectual technical systems because of the number of difficulties. The principal ones are: the lack of functional flexibility, the input/output problems, complications with adaptation and teaching algorithms realization, and, finally, the restricted possibilities of the cooperation with the traditional digital devices, when the branched network of computers is required. In fact majority of these deficiencies may be removed in the hybrid optical-electronic information systems. In this research we have generalized the experience of Optical Data Processing Laboratory on investigation, elaboration and design of the multifunctional hybrid optical-electronic systems, which may be used for analysis and recognition of images, textures and wide-band time signals.The main functional structure of designed system ( fig .1 ) is based on the architecture with central coherent-optical processor (COP)4 and includes an auxiliary digital computer of a general purpose, the buffer random access memory,5 input6 and output7 image devices, control and monitoring units. The principal features of the most important functional units of the system are listed below.