Near-infrared holographic photorefractive recording under applied electric field in undoped Bi12TiO20 sillenite crystal

Moura, André L.; Pereira, Alexsandro F.; Canabarro, Askery; Carvalho, J. F.; Oliveira, Ivan de; Santos, P. V. dos

doi:10.1016/j.optmat.2020.110398

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…It is noteworthy that a further increase (or) leads to a brightness inversion, namely, the brightness of the phantom image exceeds the brightness of the (combined) image of the read fragment (5).…”

Section: T a T A T A G T Ab G T T A A T A B T Ab Gmentioning

confidence: 99%

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Application of the associative recovery method in the challenges of increase informativity of distorted images and detection of minor changes in stored samples

Husak

2022

TAPR

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The object of research is optical-electronic methods and related digital information processing. One of the most problematic areas is the reconstruction of missing parts of the stored data and the inability to detect minor changes in the stored samples, as well as the reconstruction of the entire corrected template from its incomplete version. As part of the study, a correlation-optical approach to the problem of holographic associative memory was used, which made it possible to achieve highly efficient heteroassociative reconstruction of the entire corrected template from its incomplete version. The analysis of hologram models with phantom images and nonlinearly recorded holograms read in the associative mode shows a wide range of useful possibilities. It is primed not only in the tasks of reconstruction of data, but also in the case of insignificant changes in savings, highly effective heteroassociative reconstruction based on a non-interference mechanism. The analysis of the results of the correlation-optical approach to the problem of holographic associative memory shows that the described method opens up additional opportunities for solving the problems of detecting small changes in the object scene, which is important, in particular, for early registration of events and phenomena. It is related to the fact that the detection and localization of changes is carried out according to the difference in intensity across the image field (the effect of brightness inversion in the phantom image of referenceless hologram): the brightness of the image of the changed area is higher, and to a greater extent, the smaller the changes compared to the reference image. It should be especially noted that the specified properties of the nonlinear-holographic associative memory are realized not algorithmically, but physically, taking into account the fundamental nonlinearity of all natural processes, which is neglected when conducting a superficial (in the first approximation) analysis. Physical modeling of associative memory based on second-order holograms does not involve any circuit complications compared to the standard holographic procedure.

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Section: T a T A T A G T Ab G T T A A T A B T Ab Gmentioning

confidence: 99%

“…ISSN 2664-9969 accuracy and classification accuracy of fiber input data from images of speckle intensity alone is reported. Interesting methods of holographic recording and reproduction of information in crystals are presented in [5].…”

Section: Introductionmentioning

confidence: 99%

Application of the associative recovery method in the challenges of increase informativity of distorted images and detection of minor changes in stored samples

Husak

2022

TAPR

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(Bi13Co11)Co2O40–Co3O4 nanocomposites: Approach to different fuels in sol-gel combustion synthesis using the Box-Behnken design

Matias

Silva

et al. 2022

Ceramics International

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Experimental and theoretical investigation of the mechanical characteristics of sillenite compound: Bi12GeO20

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Isik

Gençer

et al. 2021

Journal of Alloys and Compounds

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Near-infrared holographic photorefractive recording under applied electric field in undoped Bi12TiO20 sillenite crystal

Cited by 9 publications

References 25 publications

Application of the associative recovery method in the challenges of increase informativity of distorted images and detection of minor changes in stored samples

Application of the associative recovery method in the challenges of increase informativity of distorted images and detection of minor changes in stored samples

(Bi13Co11)Co2O40–Co3O4 nanocomposites: Approach to different fuels in sol-gel combustion synthesis using the Box-Behnken design

Experimental and theoretical investigation of the mechanical characteristics of sillenite compound: Bi12GeO20

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