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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 55

Только метаданные
Improving the reliability of digital camera identification by optimizing the algorithm for comparing noise signatures
(2024) Kozlov, A. V.; Nikitin, N. V.; Rodin, V. G.; Cheremkhin, P. A.; Козлов, Александр Валерьевич; Никитин, Николай Вячеславович; Родин, Владислав Геннадьевич; Черёмхин, Павел Аркадьевич
Только метаданные
Asymmetric image optical encryption under spatially incoherent illumination
(2020) Cheremkhin, P. A.; Evtikhiev, N. N.; Krasnov, V. V.; Rodin, V. G.; Shifrina, A. V.; Starikov, R. S.; Черёмхин, Павел Аркадьевич; Евтихиев, Николай Николаевич; Родин, Владислав Геннадьевич; Шифрина, Анна Владимировна; Стариков, Ростислав Сергеевич
In this paper new method of asymmetric optical encryption is presented. It is based on the double encryption using spatially incoherent illumination: to obtain a ciphertext a plaintext is encoded twice, first time by sender, second time-by recipient. This way no exchange of encryption keys is required. Two variants of this method were analyzed: one in which both encryption procedures are implemented optically and another one in which the first operation is done optically and the second one-numerically. Both variants were numerically simulated and the latter one was implemented optically. Results of numerical and optical experiments demonstrate high quality of decrypted images (decoding error 0.19), thus confirming usability of proposed method.
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
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
Estimation of the Efficiency of Digital Camera Photosensor Noise Measurement Through the Automatic Segmentation of Non-Uniform Target Methods and the Standard EMVA 1288
(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
This paper discusses the problem of characterizing digital cameras and the determination of their noise characteristics, which is relevant for contemporary photographic equipment. The issues of limiting the accuracy of data obtained with digital cameras, related to the photosensor noise, are also highlighted. The European Machine Vision Association standard EMVA 1288 for measurement and presentation of specifications for machine vision sensors and cameras, and fast automatic segmentation of non-uniform target (ASNT) noise estimation methods are compared. The noise characteristics of the photosensors of the machine vision camera PixeLink PL-B781F, scientific camera Retiga R6, and amateur camera Canon EOS M100 are investigated. The accuracies of the measurement results and speed of calculation and the method implementation are also analyzed. The assessment of the temporal noise revealed that the ASNT method is not inferior in terms of accuracy compared to the standard method and can be implemented significantly faster, even with additional images taken into account for accuracy improvement.
Только метаданные
Lensless Optical Encryption of Multilevel Digital Data Containers Using Spatially Incoherent Illumination
(2022) Cheremkhin, P.; Evtikhiev, N.; Krasnov, V.; Ryabcev, I.; Shifrina, A.; Starikov, R.; Черёмхин, Павел Аркадьевич; Евтихиев, Николай Николаевич; Шифрина, Анна Владимировна; Стариков, Ростислав Сергеевич
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.The necessity of the correction of errors emerging during the optical encryption process led to the extensive use of data containers such as QR codes. However, due to specifics of optical encryption, QR codes are not very well suited for the task, which results in low error correction capabilities in optical experiments mainly due to easily breakable QR code’s service elements and byte data structure. In this paper, we present optical implementation of information optical encryption system utilizing new multilevel customizable digital data containers with high data density. The results of optical experiments demonstrate efficient error correction capabilities of the new data container.
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
Binarization of digital holograms by thresholding and error diffusion techniques
(2019) Cheremkhin, P. A.; Kurbatova, E. A.; Черёмхин, Павел Аркадьевич
© OSA 2019 © 2019 The Author(s)Binarization of holograms is used for the tasks of data compression, digital micromirror device (DMD) application, and etc. 50 non-iterative local, global thresholding and error diffusion binarization methods were analyzed and applied to optically recorded holograms.
Только метаданные
Application of a Digital Micromirror Device for Optical Encryption with Time Integration
(2020) Evtikhiev, N. N.; Krasnov, V. V.; Molodtsov, D. Y.; Rodin, V. G.; Starikov, R. S.; Cheremkhin, P. A.; Евтихиев, Николай Николаевич; Родин, Владислав Геннадьевич; Стариков, Ростислав Сергеевич; Черёмхин, Павел Аркадьевич
© 2020, Allerton Press, Inc.Abstract: The possibility of using a digital micromirror device (DMD) for implementing the optical encryption with time integration in quasimonochromatic spatially incoherent light is considered. An experimental setup for optical registration of image to be encrypted on a digital camera is presented. Images containing text and graphic information are encrypted and successfully decrypted using inverse filtering. The use of time integration in optical encryption makes it possible to reduce the noise caused by binarization of holograms display on DMD that contains encryption keys and to increase the diffraction efficiency of the encryption process.