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Савченкова, Екатерина Алексеевна

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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Екатерина Алексеевна
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  • Публикация
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    Adaptive non-iterative histogram-based hologram quantization
    (2024) Savchenkova, E. A.; Ovchinnikov, A. S.; Rodin, V. G.; Starikov, R. S.; Evtikhiev, N. N.; Cheremkhin, P. A.; Савченкова, Екатерина Алексеевна; Овчинников, Андрей Сергеевич; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич; Евтихиев, Николай Николаевич; Черёмхин, Павел Аркадьевич
  • Публикация
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    Adaptive Iterative Method of Selecting Weight Coefficients for Digital Hologram Binarization Using Error Diffusion
    (2022) Evtikhiev, N. N.; Rodin, V. G.; Savchenkova, E. A.; Starikov, R. S.; Cheremkhin, P. A.; Евтихиев, Николай Николаевич; Родин, Владислав Геннадьевич; Савченкова, Екатерина Алексеевна; Стариков, Ростислав Сергеевич; Черёмхин, Павел Аркадьевич
    This article discusses optical methods and technologies that can register, transform, store, transmit, and reproduce large arrays of information. Digital holograms recorded using photographic equipment of various types is common carriers of experimentally recorded information. The size of digital hologram files is several tens of megabytes. Hence, for the storage and transmission of holographic data archives via communication channels, holograms should be compressed. Binarization represents one of the options for reducing the hologram size. For binarization, an iterative adaptive method for selecting the weight coefficients of the error diffusion procedure is proposed. The method has been tested on digital holograms that were optically recorded under various conditions. The quality of the measured objects was evaluated through numerical methods of image reconstruction and after displaying digital holograms on a micromirror light modulator. The proposed method can be used for compressing and storing holographic data, measuring the characteristics and shape of micro- and macroobjects, and fast optical image reconstruction using a micromirror light modulator. © 2022, Springer Science+Business Media, LLC, part of Springer Nature.
  • Публикация
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    What Binarization Method Is the Best for Amplitude Inline Fresnel Holograms Synthesized for Divergent Beams Using the Direct Search with Random Trajectory Technique?
    (2023) Ovchinnikov, A. S.; Krasnov, V. V.; Cheremkhin, P. A.; Rodin, V. G.; Savchenkova, E. A.; Starikov, R. S.; Evtikhiev, N. N.; Овчинников, Андрей Сергеевич; Черёмхин, Павел Аркадьевич; Родин, Владислав Геннадьевич; Савченкова, Екатерина Алексеевна; Стариков, Ростислав Сергеевич; Евтихиев, Николай Николаевич
    Fast reconstruction of holographic and diffractive optical elements (DOE) can be implemented by binary digital micromirror devices (DMD). Since micromirrors of the DMD have two positions, the synthesized DOEs must be binary. This work studies the possibility of improving the method of synthesis of amplitude binary inline Fresnel holograms in divergent beams. The method consists of the modified Gerchberg–Saxton algorithm, Otsu binarization and direct search with random trajectory technique. To achieve a better quality of reconstruction, various binarization methods were compared. We performed numerical and optical experiments using the DMD. Holograms of halftone image with size up to 1024 × 1024 pixels were synthesized. It was determined that local and several global threshold methods provide the best quality. Compared to the Otsu binarization used in the original method of the synthesis, the reconstruction quality (MSE and SSIM values) is improved by 46% and the diffraction efficiency is increased by 27%.