Computer-Integrated Method of Object Detection by Thermal Polarimetric Imager

Authors

DOI:

https://doi.org/10.20535/RADAP.2021.85.21-26

Keywords:

remote sensing, thermal imager, infrared polarimetry

Abstract

Introduction. A simplified mathematical model of infrared radiation transformation and analysis in thermal imagers for different degrees of polarization target environment has been studied.

Theoretic results. Monochromatic radiation, which contains natural and linearly polarized components, is considered. The polarized optical signal model is additive. The state of radiation polarization is described by Stokes vectors. The principles of polarization image formation and their analysis using a rotating polarizer and a phase plate are considered. A matrix radiation detector is installed at the output of the optical system. It converts two-dimensional distribution of radiation intensity into an electrical video signal. This combination of polarimetric and video channels forms a polarimetric thermal imager, which has formed a new promising niche of technical means for remote sensing. An algorithm for signal processing in polarimetric thermal imagers is proposed. It is suposed, that linearly polarized component is more pronounced in the target radiation than in the background radiation. At the stage of analysis of the polarization of the total signal coming from the target environment, the direction of the predominant polarization of the whole image is determined. In the case of observing small targets, this direction coincides with the direction of background polarization. Due to the optical means of cutting the specified polarization component of the signal from the total mixture, most of the background image is eliminated, and the fully polarized component of the target radiation remains largely preserved.

Conclusions. The contrast of the final image of the target on the background increases significantly, the probability of correct detection of the target increases.

Author Biographies

V. G. Kolobrodov , National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Kyiv

Доктор технічних наук, професор, завідувач кафедри 

V. I. Mykytenko , National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Kyiv

доктор технічних наук, доцент, зам. зав. кафедри з наукової роботи

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Published

2021-06-30

How to Cite

Колобродов , В. Г., Микитенко , В. І., Пінчук , Б. Ю., Сокол , Б. В. and Тягур , В. М. (2021) “Computer-Integrated Method of Object Detection by Thermal Polarimetric Imager”, Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, (85), pp. 21-26. doi: 10.20535/RADAP.2021.85.21-26.

Issue

Section

Telecommunication, navigation, radar systems, radiooptics and electroacoustics