A method for localizing a reference object in a current image with several bright objects

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.101920

Keywords:

current image, identification and selection of a multi-threshold reference object, unimodal decision function

Abstract

To ensure the effective functioning of the correlation-extreme navigation systems (CENSs), a method is developed to localize a reference object (RO) in a current image (CI) with several bright objects. The peculiarity of the method consists in converting the CI to a binary unit by determining the average value of the background and setting it for the threshold of the image quantization, which in turn determines the amount of probabilities of errors of the first and second kinds as well as entails assigning the objects of the viewing surface (VS) and the backgrounds to two classes: the RO and the background. The CI model is represented by the brightness values of the corresponding objects and backgrounds of the VS in the differentiation elements. In the model of the current image, the RO has the highest brightness. Other objects that are similar in brightness and commensurate with the RO are categorized as false. The reference image (RI) is set by the contrast mark and the geometrical shape of the object, and it is binary. An algorism has been developed for localizing the RO in an image by searching for a fragment of a binary CI with a maximum value of units that coincides with the RI. The peculiarity of the algorithm consists in adapting the application procedure for the threshold conversion of a CI with an unknown value of the signal-noise ratio. A method has been developed to clarify the maximum value of the DF and to determine the coordinates of the RO in the field of the CI matrix. The method consists in the summation of the number of units of different sections and finding the highest value of the DF. The highest value of the DF coincides with the full match between the CI and the RI. An analytical expression has been obtained for the estimation of the probability of localizing the RO. The expression establishes dependence of the probability of localizing the RO on the parameters that are specified in the stages of solving the problem of localizing the RO, which are the identification, the multi-threshold selection, and the specification of the maximum DF. By modeling the process of forming the DF, numerical estimates have been obtained for the probability of localizing the RO. The research results indicate the feasibility of using the proposed method in a CENS in relation to a VS with several bright objects.

Author Biographies

Alexander Sotnikov, Ivan Kozhedub Kharkiv University of Air Force Sumska str., 77/79, Kharkiv, Ukraine, 61023

Doctor of Technical Sciences, Professor

Scientific Center of Air Forces

Volodymyr Tarshyn, Ivan Kozhedub Kharkiv University of Air Force Sumska str., 77/79, Kharkiv, Ukraine, 61023

Doctor of Technical Sciences, Associate Professor

Department of Armament of Radar Troops

Nataliia Yeromina, Ukrainian Engineering Pedagogics Academy Universitets’ka str., 16, Kharkiv, Ukraine, 61003

Assistant

Department of Heat Power Engineering And Energy Saving Technologies

Serhii Petrov, Ukrainian Engineering Pedagogics Academy Universitets’ka str., 16, Kharkiv, Ukraine, 61003

PhD, Associate Professor

Department of Physics, Electrical Engineering and Power Engineering

Nataliіa Antonenko, Ukrainian Engineering Pedagogics Academy Universitets’ka str., 16, Kharkiv, Ukraine, 61003

PhD, Associate Professor

Department of Heat-and-Power Engineering and Energy Saving Technologies

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Published

2017-06-15

How to Cite

Sotnikov, A., Tarshyn, V., Yeromina, N., Petrov, S., & Antonenko, N. (2017). A method for localizing a reference object in a current image with several bright objects. Eastern-European Journal of Enterprise Technologies, 3(9 (87), 68–74. https://doi.org/10.15587/1729-4061.2017.101920

Issue

Section

Information and controlling system