Results 11 to 20 of about 752 (176)

Optical Hyperspectral Image Cryptosystem Based on Affine Transform and Fractional Fourier Transform [PDF]

open access: yesApplied Sciences, 2019
An encryption algorithm for hyperspectral data in fractional Fourier domain is designed. Firstly, the original hyperspectral image is separated into single bands and then each pair of bands are regarded as the real and imaginary part of a complex ...
Hang Chen   +3 more
doaj   +2 more sources

Identification of Sonar Detection Signal Based on Fractional Fourier Transform [PDF]

open access: yesPolish Maritime Research, 2018
Aiming at the source of underwater acoustic emission, in order to identify the enemy emission sonar source accurately. Using the digital watermarking technology and combining with the good time-frequency characteristics of fractional Fourier transform ...
Biao Wang   +3 more
doaj   +2 more sources

Application of Fractional Fourier Transform to Moving Target Indication via Along-Track Interferometry [PDF]

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
A relatively unknown yet powerful technique, the so-called fractional Fourier transform (FrFT), is applied to SAR along-track interferometry (SAR-ATI) in order to estimate moving target parameters.
Chiu Shen
doaj   +2 more sources

Discussion on Weighted Fractional Fourier Transform and Its Extended Definitions [PDF]

open access: yesFractal and Fractional
The weighted fractional Fourier transform (WFRFT) has always been considered a development of the discrete fractional Fourier transform (FRFT). This paper points out that the WFRFT is a discrete FRFT of eigenvalue decomposition, which will change the ...
Tieyu Zhao, Yingying Chi
doaj   +2 more sources

Fractional Fourier transform of Airyprime beams [PDF]

open access: yesResults in Physics
Analytical expressions of the electric field, the centriod, the beam half width, and the linear momentum of the fractional Fourier transform (FrFT) of an Airyprime beam are derived, respectively. The relation between the centriods or the beam half widths
Jian He   +5 more
doaj   +2 more sources

Programmable photonic unitary circuits for light computing. [PDF]

open access: yesNanophotonics
Abstract Unitarity serves as a fundamental concept for characterizing linear and conservative wave phenomena in both classical and quantum systems. Developing platforms that perform unitary operations on light waves in a universal and programmable manner enables the emulation of complex light–matter interactions and the execution of general‐purpose ...
Kim K   +5 more
europepmc   +2 more sources

Fractional Fourier Transform Aided Computerized Framework for Alcoholism Identification in EEG [PDF]

open access: yes, 2022
Alcoholism has a detrimental impact on brain functioning. Electroencephalogram (EEG) signals are commonly used by clinicians and researchers to quantify and document alcoholic brain activity.
Akbari, Hesam   +5 more
core   +1 more source

The fractional Fourier transform as a biomedical signal and image processing tool: A review [PDF]

open access: yes, 2021
This work presents a literature review of the fractional Fourier transform (FrFT) investigations and applications in the biomedical field. The FrFT is a time-frequency analysis tool that has been used for signal and image processing due to its capability
Gómez-Echavarría A.   +2 more
core   +1 more source

Study on the Mainardi beam through the fractional Fourier transforms system [PDF]

open access: yesКомпьютерная оптика, 2018
In this paper, we introduced the Mainardi beam and indicated its attributes under the Fractional Fourier transform for power variations of Fractional Fourier transform.
Forouzan Habibi   +2 more
doaj   +1 more source

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