Zobrazeno 1 - 10
of 259
pro vyhledávání: '"Vladimir KATKOVNIK"'
Publikováno v:
Frontiers in Remote Sensing, Vol 3 (2022)
A fast and shallow convolutional neural network is proposed for hyperspectral image super-resolution inspired by Spatial-Spectral Reconstruction Network (SSR-NET). The feature extraction ability is improved compared to SSR-NET and other state-of-the-
Externí odkaz:
https://doaj.org/article/0356955a56f84f0e9097c3fd0e3c9de1
Publikováno v:
Engineering Proceedings, Vol 34, Iss 1, p 19 (2023)
We consider the application of a recently developed hyperspectral broadband phase retrieval (HSPhR) technique for spectrally varying object and modulation phase masks at 100 spectral components. The HSPhR method utilizes advanced techniques such as S
Externí odkaz:
https://doaj.org/article/f2ee978bfb8c40d5ac60b258b1498a69
Publikováno v:
Sensors & Transducers, Vol 233, Iss 5, Pp 33-39 (2019)
In this paper, we propose a novel complex domain denoising algorithm for hyperspectral data. The algorithm is based on the Complex Domain Block- Matching 3D (CDBM3D) flter and on similarity of hyperspectral data, which are usually slow varying for cl
Externí odkaz:
https://doaj.org/article/9fd9abe5e8a54a75995cf30d909450d4
Autor:
Elena Achimova, Vladimir Abaskin, Daniel Claus, Giancarlo Pedrini, Igor Shevkunov, Vladimir Katkovnik
Publikováno v:
Компьютерная оптика, Vol 42, Iss 2, Pp 267-272 (2018)
The topography of surface relief gratings was studied by digital holographic microscopy. The applicability of the method for quantitative measurements of surface microstructure at nanoscale was demonstrated. The method for wavefront reconstruction of
Externí odkaz:
https://doaj.org/article/e2bb078b14a249bab472abc645e9ad71
Publikováno v:
Sensors, Vol 18, Iss 11, p 4006 (2018)
This paper proposes a novel algorithm for image phase retrieval, i.e., for recovering complex-valued images from the amplitudes of noisy linear combinations (often the Fourier transform) of the sought complex images. The algorithm is developed using
Externí odkaz:
https://doaj.org/article/14bd7f57045f4cd08f7fcd453d82809f
Publikováno v:
Applied Sciences, Vol 8, Iss 5, p 719 (2018)
We study the problem of multiwavelength absolute phase retrieval from noisy diffraction patterns. The system is lensless with multiwavelength coherent input light beams and random phase masks applied for wavefront modulation. The light beams are form
Externí odkaz:
https://doaj.org/article/3504106503fa4761ab87322d6d1f0661
Autor:
Samuel Pinilla, Kumar Vijay Mishra, Igor Shevkunov, Mojtaba Soltanalian, Vladimir Katkovnik, Karen Egiazarian
Publikováno v:
IEEE Signal Processing Magazine. 40:46-60
Autor:
Samuel Pinilla, Johannes E. Fröch, Seyyed Reza Miri Rostami, Vladimir Katkovnik, Igor Shevkunov, Arka Majumdar, Karen Egiazarian
Publikováno v:
Science Advances. 9
The race for miniature color cameras using flat meta-optics has rapidly developed the end-to-end design framework using neural networks. Although a large body of work has shown the potential of this methodology, the reported performance is still limi
Autor:
Samuel Pinilla, Seyyed Reza Miri Rostami, Igor Shevkunov, Vladimir Katkovnik, Karen Egiazarian
End-to-end optimization of diffractive optical elements (DOEs) profile through a digital differentiable model combined with computational imaging have gained an increasing attention in emerging applications due to the compactness of resultant physica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83eb68d62aff23d9eb471bef5596c351
https://trepo.tuni.fi/handle/10024/143327
https://trepo.tuni.fi/handle/10024/143327
Autor:
SeyyedReza MiriRostami, Samuel Pinilla, Igor A. Shevkunov, Vladimir Katkovnik, Karen Eguiazarian
Publikováno v:
Unconventional Optical Imaging III.
A hybrid imaging system is a simultaneous physical arrangement of a refractive lens and a multilevel phase mask (MPM) as a diffractive optical element (DOE). The favorable properties of the hybrid setup are improved extended-depth-of-field (EDoF) ima