Search Results for author: Igor Shevkunov

Found 4 papers, 0 papers with code

Unfolding-Aided Bootstrapped Phase Retrieval in Optical Imaging

no code implementations3 Mar 2022 Samuel Pinilla, Kumar Vijay Mishra, Igor Shevkunov, Mojtaba Soltanalian, Vladimir Katkovnik, Karen Egiazarian

Phase retrieval in optical imaging refers to the recovery of a complex signal from phaseless data acquired in the form of its diffraction patterns.

Retrieval

ADMM and Spectral Proximity Operators in Hyperspectral Broadband Phase Retrieval for Quantitative Phase Imaging

no code implementations14 May 2021 Vladimir Katkovnik, Igor Shevkunov, Karen Egiazarian

A novel formulation of the hyperspectral broadband phase retrieval is developed for the scenario where both object and modulation phase masks are spectrally varying.

Retrieval

Power-Balanced Hybrid Optics Boosted Design for Achromatic Extended-Depth-of-Field Imaging via Optimized Mixed OTF

no code implementations9 Mar 2021 Seyyed Reza Miri Rostami, Samuel Pinilla, Igor Shevkunov, Vladimir Katkovnik, Karen Egiazarian

The simulation results also reveal that optimizing the optical power-balance, Fresnel order, and the number of levels parameters are essential for system performance attaining an improvement of up to 5dB of PSNR using the optimized OTF compared with its counterpart lensless setup.

Optics Image and Video Processing

Hyperspectral holography and spectroscopy: computational features of inverse discrete cosine transform

no code implementations4 Oct 2019 Vladimir Katkovnik, Igor Shevkunov, Karen Egiazarian

Broadband hyperspectral digital holography and Fourier transform spectroscopy are important instruments in various science and application fields.

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