Analysis of singular phase based on double random phase encoding using phase retrieval algorithm

Nakano, K.; Suzuki, H.

doi:10.1016/j.optlaseng.2020.106300

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…It is found that the sensitivity of SPR algorithm to the initial phase is weaker. The G-S algorithm is applied to optical image encryption because its attributes can provide good security [47,48]. The initial phase is not used as the key of the system, so different initial phases can be selected for each encryption process, and different ciphertexts can be obtained.…”

Section: Discussion and Prospectmentioning

confidence: 99%

Modified Gerchberg–Saxton (G-S) Algorithm and Its Application

Zhao

Chi

2020

Entropy

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The Gerchberg–Saxton (G-S) algorithm is a phase retrieval algorithm that is widely used in beam shaping and optical information processing. However, the G-S algorithm has difficulty obtaining the exact solution after iterating, and an approximate solution is often obtained. In this paper, we propose a series of modified G-S algorithms based on the Fresnel transform domain, including the single-phase retrieval (SPR) algorithm, the double-phase retrieval (DPR) algorithm, and the multiple-phase retrieval (MPR) algorithm. The analysis results show that the convergence of the SPR algorithm is better than that of the G-S algorithm, but the exact solution is not obtained. The DPR and MPR algorithms have good convergence and can obtain exact solutions; that is, the information is recovered losslessly. We discuss the security advantages and verification reliability of the proposed algorithms in image encryption. A multiple-image encryption scheme is proposed, in which n plaintexts can be recovered from n ciphertexts, which greatly improves the efficiency of the system. Finally, the proposed algorithms are compared with the current phase retrieval algorithms, and future applications are discussed. We hope that our research can provide new ideas for the application of the G-S algorithm.

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Section: Discussion and Prospectmentioning

confidence: 99%

Modified Gerchberg–Saxton (G-S) Algorithm and Its Application

Zhao

Chi

2020

Entropy

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“…Additionally, a statistical method was used to examine the characteristics of big phase key images . [6].…”

Section: Based On Double Random Phase Techniquementioning

confidence: 99%

Image Security Enhancement Using Cryptography

Shivaraju¹,

Deepa²,

Deepthi³

et al. 2023

IJSREM

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In the recent years, the trends in technology have come up with a solution to share digital media in an easier and rapid manner which leads to the use of media in an illegitimate manner. In order to make this problem less severe, various cryptographic techniques can be used to secure the digital media by encrypting them. The following article presents a technique that enables the implementation of image security through three different techniques namely Double random phase encoding, Chaos based encryption and steganography methods. Key Words: Cryptography, Double Random Phase, Steganography, Chaos encryption, image security.

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“…Based on spatial constraints for intensity information of the light field, the phase-retrieval algorithm can reconstruct the phase distribution through iterative calculation [2][3][4][5][6][7][8]. Traditional wavefront sensors like Shack-Hartmann wavefront sensors (SHWFSs) suffer from a fundamental tradeoff between spatial resolution and phase estimation.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of phase retrieval accuracy by correcting transmission distance measurement error in the ptychography method based on clarity evaluation

jiang,

Liu,

Liu

et al. 2024

Preprint

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Ensuring accurate phase-recovery accuracy in extended ptychography relies on precise measurement of the transmission distance between the sample and diffraction planes. This study proposes a novel method for determining the precise position of the diffraction surface based on the definition evaluation function. By accurately computing the distance between the sample surface and the diffraction surface, this method effectively mitigates phase reconstruction aberrations caused by the measurement error of transmission distances. Consequently, experimental validation was conducted to reconstruct the wavefront of an optical element. The results indicate the technology to be highly effective in suppressing the defocus phase error during the phase reconstruction process of extended ptychography, thereby enhancing the accuracy of phase retrieval.

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Analysis of singular phase based on double random phase encoding using phase retrieval algorithm

Cited by 13 publications

References 20 publications

Modified Gerchberg–Saxton (G-S) Algorithm and Its Application

Modified Gerchberg–Saxton (G-S) Algorithm and Its Application

Image Security Enhancement Using Cryptography

Enhancement of phase retrieval accuracy by correcting transmission distance measurement error in the ptychography method based on clarity evaluation

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