Encryption of digital hologram of 3-D object by virtual optics

Kim, Hyun; Kim, Do-hyung; Lee, Yeonho

doi:10.1364/opex.12.004912

Cited by 85 publications

(38 citation statements)

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“…From Eq. (1), if f(x, y) is an on pixel, the influence of individual on-pixels can be assumed to be white noise across the entire image plane due to the first random phase mask φ(x, y) in the Fresnel region (Situ and Zhang 2005;Kim et al 2004). For this reason, the spatial distribution of on-pixels in the original image can be considered to be negligible.…”

Section: Analysis Of Crosstalk Noise In Individual Imagesmentioning

confidence: 99%

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

et al. 2015

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We report a crosstalk analysis method for multiple-image encryption, which focuses on the individual effects of different multiplexed images in the crosstalk noise. The different noise characteristics are analyzed using a simulation model for each image. Using the resulting crosstalk noise characteristics, we can explain the differences in the quality of multiplexed images that cannot be explained using conventional approaches. Furthermore, we describe a simple image-modulation method to compensate for differences in image quality. We then experimentally show that using the image-modulation technique, we can significantly reduce the variation in image quality within a set of images. This technique leads to improvements in the quality of the poorest images in the set.

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Section: Analysis Of Crosstalk Noise In Individual Imagesmentioning

confidence: 99%

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

et al. 2015

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“…In recent years, due to the high-speed processing and parallel ability, the optical information security has drawn more and more attention with the rapid development of information technology, since the double random phase encoding (DRPE) scheme was invented by Refregier and Javidi [1]; some other optical information processing techniques or transforms, such as digital holography [2,3], fractional Fourier transform [4][5][6], phase-shifting interferometry [7,8], phase retrieval [9][10][11][12], Fresnel transform [13,14], gyrator transform [15], fractional Mellin transform [16], joint transform correlator [17], two beam's interference [18,19], diffractive imaging [20], polarization encoding [21], aperture movement [22], phase reservation and compression [23], ghost imaging [24], have been combined with DRPE to build more versatile security systems.…”

Section: Introductionmentioning

confidence: 99%

A kind of multilevel authentication system for multiple-image by modulated real part synthesis and iterative phase multiplexing

Pan

Meng

Wang

et al. 2015

Journal of Modern Optics

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2015): A kind of multilevel authentication system for multiple-image by modulated real part synthesis and iterative phase multiplexing, Journal of Modern Optics, A kind of multilevel authentication system for multiple-image based on modulated real part synthesis and iterative phase multiplexing in the Fresnel domain is proposed. In the design process of the low-level authentication system, a series of normalized real part information are iteratively generated by phase retrieval algorithm in the Fresnel domain, and the final private keys for different individual low-level certification images can be fabricated by binary amplitude modulation, superposition, synthesis, and sampling; while in the design process of the high-level authentication system, the final private keys for different individual high-level certification images can be generated by iterative phase information encoding and multiplexing. During the high-level authentication, the meaningful certification image can be reconstructed by the inverse Fresnel transform with the corresponding correct private keys, meanwhile, the correlation coefficient is utilized as judgment criterion; while in the low-level authentication, with the help of correct keys, the noise-like image with meaningless information can be recovered, but a remarkable peak output in the nonlinear correlation coefficient can be generated, which is adopted as the criterion to judge whether the low-level authentication is successful or not. Theoretical analysis and numerical simulations both verify the feasibility of the proposed method.

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“…Among various encryption strategies, the optical encryption technique is considered an important topic, since it possesses unique characteristics, such as multi-parameter capability and parallel processing [1][2][3][4][5][6]. The pioneering work on optical encryption, which was devoted by Refregier and Javidi in 1995, is based on double random phase encoding (DRPE) scheme [7].…”

Section: Introductionmentioning

confidence: 99%

Virtual optical image encryption based on double random amplitude encoding

Gong

2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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Abstract.A new optical encryption system is presented in this paper. By replacing the random phase plates by random amplitude plates in the double random phase encoding system, a novel optical encryption system is formed. The Statistical characteristics of the autocorrelation function of the encoded image are investigated; we found that the original image had been changed into a complex-amplitude stationary white noise. As a result, this approach proved to be robustness against brute force attack. Computer simulations are performed and the results are consistent with theoretical analysis. Moreover, some properties of this method prior to double random phase encoding system are discussed.

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Encryption of digital hologram of 3-D object by virtual optics

Cited by 85 publications

References 0 publications

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

A kind of multilevel authentication system for multiple-image by modulated real part synthesis and iterative phase multiplexing

Virtual optical image encryption based on double random amplitude encoding

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