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Черёмхин, Павел Аркадьевич

Организационные подразделения

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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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Черёмхин

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Павел Аркадьевич

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Теперь показываю 1 - 10 из 57

Только метаданные
Virtual camera-based analysis of photosensor characterization methods
(2022) Cheremkhin, P. A.; Evtikhiev, N. N.; Kozlov, A. V.; Krasnov, V. V.; Rodin, V. G.; Starikov, R. S.; Черёмхин, Павел Аркадьевич; Евтихиев, Николай Николаевич; Козлов, Александр Валерьевич; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич
Только метаданные
Ciphertext only attack on QR code optical encryption system with spatially incoherent illumination using a neural network
(2024) Rymov,D.A.; Shifrina,A.V.; Cheremkhin,P.A.; Ovchinnikov,A.S.; Krasnov,V.V.; Starikov,R.S.; Рымов, Дмитрий Андреевич; Шифрина, Анна Владимировна; Черёмхин, Павел Аркадьевич; Овчинников, Андрей Сергеевич; Стариков, Ростислав Сергеевич
Только метаданные
Influence of Spatial Losses of the Signal Detected by a Single-Pixel Detector on the Quality of Object Image Reconstruction
(2021) Kulakov, M. N.; Rodin, V. G.; Starikov, R. S.; Cheryomkhin, P. A.; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич; Черёмхин, Павел Аркадьевич
© 2021, Springer Science+Business Media, LLC, part of Springer Nature.The reconstruction methods, which are based on compressed sensing (CS), make it possible to record and reconstruct information basing on its sparse or compressed representation. In this work, we study resistance of CS-based single-pixel imaging to partial loss of the intensity of the recorded radiation from an object with a limited area of the detector. The problem was solved experimentally by implementing the so-called single-pixel camera, as well as detecting optical radiation from the object and reconstructing its image with the use of CS methods. The method resistance to spatial radiation losses is estimated as a function of the size and shape of the detector aperture. The quality of image reconstruction depending on the two following factors is assessed: the fraction of the intensity of the detected radiation and the quantity of single-pixel detections. The results can ensure significantly wider application of the method to reconstruct data, both detected in dynamic and scattering media (including the introduction of various apertures and Fourier filtering) and in the case of significant spatial radiation losses.
Только метаданные
DMD-based optical pattern recognition using holograms generated with the Hartley transform
(2023) Cheremkhin, P. A.; Krasnov, V. V.; Rodin, V. G.; Starikov, R. S.; Черёмхин, Павел Аркадьевич; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич
Только метаданные
Optical encryption of images in spatially incoherent light using DMD modulator
(2019) Molodtsov, D. Yu.; Cheremkhin, P. A.; Krasnov, V. V.; Rodin, V. G.; Черёмхин, Павел Аркадьевич; Родин, Владислав Геннадьевич
© OSA 2019 © 2019 The Author(s)Scheme of real time optical encryption using DMD modulator is described. Experimental results of optical encryption of images in spatially incoherent light are demonstrated.
Только метаданные
A method for measuring digital camera noise by automatic segmentation of a striped target
(2021) Evtikhiev, N. N.; Kozlov, A. V.; Krasnov, V. V.; Rodin, V. G.; Starikov, R. S.; Cheremkhin, P. A.; Евтихиев, Николай Николаевич; Козлов, Александр Валерьевич; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич; Черёмхин, Павел Аркадьевич
Currently, cameras are widely used in scientific, industrial and amateur tasks. Thus, one needs to be able to quickly evaluate characteristics and capabilities of a particular camera. A method for measuring noise components of the camera photosensor is proposed. It allows one to estimate shot noise, dark temporal noise, photo response non-uniformity and dark signal non-uniformity. For noise measurement, just two images of the same scene need to be registered. The scene consists of several stripes (quasihomogeneous regions). Then the images are processed by automatic signal segmentation. The performance and accuracy of the proposed method are higher than or equal to other fast methods. The experimental results obtained are similar to those derived using a time-consuming standard method within a measurement error.
Только метаданные
Methods of diffractive optical element generation for rapid, high-quality 3D image formation of objects divided into a set of plane layers
(2024) Zlokazov, E. Y.; Minaeva, E. D.; Rodin, V. G.; Starikov, R. S.; Cheremkhin, P. A.; Shifrina, A. V.; Злоказов, Евгений Юрьевич; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич; Черёмхин, Павел Аркадьевич; Шифрина, Анна Владимировна
Только метаданные
Error diffusion hologram binarization for DMD applications
(2021) Cheremkhin, P. A.; Evtikhiev, N. N.; Kurbatova, E. A.; Krasnov, V. V.; Rodin, V. G.; Черёмхин, Павел Аркадьевич; Евтихиев, Николай Николаевич; Родин, Владислав Геннадьевич
© 2021 SPIE.Digital micromirror device (DMD) allows very fast binary light modulation. For digital hologram displaying using DMD, binarization should be applied. In this work, 12 error diffusion and 8 dot diffusion binarization algorithms were considered. All methods were used in both iterative and non-iterative forms. Quality of reconstructed images from binarized holograms was compared. Optically registered digital holograms and synthesized holograms of binary and grayscale images were used. Among the error diffusion methods, Stucky's and Atkinson's standard error diffusion methods and dot diffusion methods provide the highest quality of reconstruction. The effect of the pixel bypass matrix on the quality of reconstructed images was also evaluated. As bypass matrices, standard variants (for example, direct and reverse sequential bypass of pixels on rows or columns, a matrix with a line-by-line alternating direction of bypass of pixels, a spinning and swirling spiral matrices), and more complex types (for example, used in the Knuth dot diffusion method) were used. Non-iterative error diffusion with use of several specialized bypass matrices improves the quality up to 7%. Iterative realization of the error diffusion allows to increase quality to 15%.
Только метаданные
New customizable digital data container for optical cryptosystems
(2021) Cheremkhin, P. A.; Evtikhiev, N. N.; Krasnov, V. V.; Ryabcev, I. P.; Shifrina, A. V.; Starikov, R. S.; Черёмхин, Павел Аркадьевич; Евтихиев, Николай Николаевич; Шифрина, Анна Владимировна; Стариков, Ростислав Сергеевич
© 2021 IOP Publishing LtdQuick response (QR) codes have recently become a popular data container for optical encryption systems. Their effectiveness is based on the error-correction codes, that allow them to decode data even when the media itself is significantly damaged. However, QR codes were developed for specific applications and have a significant number of elements that are superfluous for optical encryption. In this paper we present a new customizable digital data container (CDDC), designed to replace QR codes in optical encryption. CDDC is based on the error-correction codes too, but has a wide range of configurable parameters and can be specialized for a particular optical setup. The results of noise robustness analysis, numerical and optical experiments on application of the new container in a spatially incoherent optical encryption system demonstrate the supremacy of CDDC in comparison to QR codes in terms of error correction capabilities and data density.
Только метаданные
Iterative synthesis of binary inline Fresnel holograms for high-quality reconstruction in divergent beams with DMD
(2022) Cheremkhin, P. A.; Evtikhiev, N. N.; Krasnov, V. V.; Starikov, R. S.; Zlokazov, E. Y.; Черёмхин, Павел Аркадьевич; Евтихиев, Николай Николаевич; Стариков, Ростислав Сергеевич; Злоказов, Евгений Юрьевич
© 2021 Elsevier LtdAim of this paper is formation of single focused diffraction order using binary amplitude modulation for digital micromirror device (DMD) applications. This can be achieved by using inline binary Fresnel holograms with divergent incident beam. However, extremely low reconstruction quality and diffraction efficiency of such holograms, synthesized by conventional means, prevent it. Here, we present new iterative method of synthesis of binary inline Fresnel holograms with much higher image reconstruction quality and diffraction efficiency compared to standard technique of hologram direct calculation. Synthesis procedure was carried out in two stages. The first stage of the new technique is based on Gerchberg-Saxton algorithm with two principal differences. First one is that synthesized diffractive optical element (DOE) is not a phase one, but an inline binary amplitude hologram. And second difference is that incident wavefront is spherical instead of a plane one. The second stage includes an application of the direct search with random trajectory method which greatly improves hologram characteristics by consequent processing of every pixel in it. The resulting binary inline Fresnel holograms in comparison to ones, synthesized using direct calculation method, have up to 11 times lower reconstruction error and up to 4 times higher diffraction efficiency. Results of optical reconstruction using DMD also demonstrate superiority of the new approach.