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DOI: 10.17586/1023-5086-2025-92-05-3-11
УДК: 535.42
Optical spatial filters for controlling the extracted object contours width
Khorin P.A., Ivliev N.A., Khonina S.N. Optical spatial filters for controlling the extracted object contours width [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 5. P. 3–11. http://doi.org/10.17586/1023-5086-2025-92-05-3-11
Subject of study. Optical spatial filters based on the Fourier correlator scheme for controlling the width of the extracted object’s image contours. Aim of study. Analyzing the influence of light modes on the properties of an object's image contour extraction and, accordingly, the possibility of recognizing and identifying an object. Method. A numerical simulation of the Fourier correlator with a multichannel spatial filter matched with the Gauss–Laguerre modes and Zernike polynomials is performed. The multichannel filter allows to simultaneously generate several transformed images (with extracted contours of different widths) of one object under study to be formed simultaneously in one plane. Main results. The research results show that it is possible to use a set of Gauss–Laguerre and Zernike polynomials modes as spatial filters to control the width of the extracted an object's image contours. Practical significance. We can talk about the potential improvement of object visualization and recognition in machine vision tasks, including in real time. It is worth noting that the multichannel optical element forms transformed images in different diffraction orders in one focal plane, which is an advantage for static (without replacing or rebuilding the filter) dataset formation.
spatial filters, multichannel diffraction optics, edge extraction, Laguerre–Gaussian modes, Zernike polynomials
Acknowledgements:this study was supported by the state assignment for scientific research to Samara University (project FSSS-2024-0014) in the part of numerical simulation and by the grant of the Russian Science Foundation № 24-79-10101 in the theoretical part.
OCIS codes: 050.1970, 260.1960
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