Open AccessIncrease the contrast of the image of objects in the active optoelectronic system with dynamic spectral processing of optical emitting
Author(s) -
O. Cherkashyna
Publication year - 2020
Publication title -
svìtlotehnìka ta elektroenergetika
Language(s) - English
Resource type - Journals
eISSN - 2415-3923
pISSN - 2079-424X
DOI - 10.33042/2079-424x-2020-3-59-122-126
Subject(s) - dynamic range , signal (programming language) , signal processing , computer science , optics , a priori and a posteriori , block diagram , multispectral image , optical filter , optoelectronics , physics , computer vision , engineering , telecommunications , radar , electrical engineering , philosophy , programming language , epistemology
The article discusses a method for increasing the contrast of images in an optoelectronic system based on active dynamic spectral matched filtering. The principles of constructing active optoelectronic systems with matched filtering are based on the fact that the optical system uses a set of amplitude-controlled radiation sources operating in different parts of the spectral range as emitting sources. It is essential that the energy composition of the light emission control signals is formed on the basis of a priori information about the characteristics of the target and the background, so as to reduce the value of the spectral components of the optical signal reflected from the surface belongs to the background and with minimal attenuation of the signal intensity belonging to the object. The method assumes the presence of a set of a priori information about the spectral characteristics of the background and the object to form the instrumental function for controlling the amplitude of emitting sources.The analysis of the mathematical and physical aspects of systems with dynamic spectral processing of active type optical emitting is made. It is shown that an active optoelectronic system with dynamic spectral processing can be considered as an analog processor for calculating the dot product of a vector by a vector. One of the factors is the reflection coefficient from a surface with a priori known characteristics, and the second is a dimmable multispectral signal.A block diagram of an optoelectronic system with dynamic spectral processing of optical emitting with active formation of the information field in order to increase the contrast of the object image has been developed.The goal of the article is to develop the mathematical and physical foundations for constructing an active optoelectronic system with dynamic spectral processing of optical emitting in order to increase the image contrast.