Optical image encryption and authentication using phase-only computer-generated hologram

Wang, Wenqi; Wang, Xiaogang; Xu, Bo; Chen, Junlang

doi:10.1016/j.optlaseng.2021.106722

Cited by 39 publications

(18 citation statements)

References 30 publications

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“…A digital random phase or diffuser phase distribution evenly distributes the light energy across the hologram plane. The image information is distributed across the hologram that makes it robust and enhances the diffraction efficiency of the hologram [27,31,[39][40][41][42][43][44]. Mathematically,…”

Section: Phase Only Cghmentioning

confidence: 99%

“…In this approach, a pre ORAP is applied to the host image and then object light is multiplied by virtual convergence light that enhances reconstructed hologram quality and reduces speckle noise [30]. Then, computer generated holograms were proposed using various transforms and encryption techniques such as phase only computer generated hologram [31], chaos hologram [32], ghost imaging [33], 3D image encryption [34,35], interference based algorithms [36,37], and wavelength multiplexing and lens less Fresnel holograms [38].…”

Section: Introductionmentioning

confidence: 99%

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Watermarking algorithm based on phase-only CGH in fractional Hartley domain for DICOM images

Yadav,

Sachin,

Singh

2024

J. Opt.

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In this manuscript, we proposed a watermarking algorithm based on phase-only computer-generated holography (CGH) in the fractional Hartley domain for digital imaging and communications in medicine (DICOM) images. The proposed algorithm improves the security of the CGH-based algorithm. The cascaded use of fractional Hartley transform and attenuation factor β increases the keyspace of the proposed watermarking algorithm. The robustness and effectiveness of the proposed watermarking algorithm is validated using simulations on DICOM images. The effectiveness of the proposed watermarking algorithm is assessed using statistical tools in terms of mean-squared error, information entropy, correlation coefficient, histogram, and mesh plots. The robustness is evaluated by testing the proposed algorithm’s performance under real-time threats, including contamination and data loss attacks. Furthermore, the security of the proposed algorithm is also tested for existing cryptographic attacks, such as chosen-plaintext attacks, and known-plaintext attacks. The simulation results indicate that the proposed watermarking algorithm is robust and effective.

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Section: Phase Only Cghmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Watermarking algorithm based on phase-only CGH in fractional Hartley domain for DICOM images

Yadav,

Sachin,

Singh

2024

J. Opt.

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show abstract

“…Singh et al [10] proposed a grayscale image encryption scheme based on jigsaw transform and chaos, in which the random intensity mask was generated from the chaotic Logistic map. In addition to the DRPE-based and CRPE-based encryption schemes, researchers have also proposed a series of optical image encryption schemes based on digital holography [11,12], computer-generated holography [13,14], phase retrieval algorithm [15], interference [16], joint transform correlator [17], diffractive imaging [18], computational ghost imaging [19], single pixel imaging [20], ptychography [21], integral imaging [22] and deep learning [23].…”

Section: Introductionmentioning

confidence: 99%

Optical voice encryption based on speckle-illuminated fourier ptychography and plaintext-related chaotic random phase mask

Li,

Xu,

Wang

et al. 2024

Phys. Scr.

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In this paper, we propose an optical voice encryption scheme based on speckle-illuminated Fourier ptychography (FP) and plaintext-related chaotic random phase mask (CRPM). In this proposed encryption scheme, the plaintext-related CRPMs are generated by chaotic Lozi map and secure hash algorithm (SHA-256). During the encryption process, the voice signal to be encrypted is first converted into a two-dimensional (2D) voice map. Then, with the help of CRPMs and speckle-illuminated FP, the voice map is encrypted into a series of noise-like low-resolution images. During the decryption process, the original voice signal can be recovered from the series of noise-like low-resolution images via Fourier ptychographic phase retrieval algorithm and the CRPMs. To the best of our knowledge, it is the first time to use the Fourier ptychography and chaotic random phase mask to implement the optical encryption of the voice signal. In addition, in this proposed encryption scheme, the chaotic parameters can replace the whole random phase masks as the secret keys, which makes the management and transmission of the secret keys become more convenient. Moreover, since the plaintext-related chaotic parameter keys can be updated dynamically, the security of the proposed encryption scheme can be further improved. The feasibility, security and robustness of the proposed encryption scheme are further analyzed by numerical simulations.

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“…CGHs don't require special holographic recording materials, but instead use Spatial Light Modulators (SLMs) to load CGHs. SLMs are highly flexible and are widely used in beam shaping [4], holographic displays [5] and atom trapping [6]. Since the current mainstream commercial SLMs can only modulate either the amplitude or the phase of the light wave, but not both directly, only phase-only or amplitude-only hologram can be loaded on the SLM [7].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Iterative Algorithm of Amplitude Weighting and Phase Gradient Descent for Generating Phase-Only Fourier Hologram

Min¹,

Yang²,

Du³

et al. 2022

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Reconstruction of target images from phase-only hologram (POH) has the advantages of high diffraction efficiency and no conjugate terms. The Gerchberg-Saxton (GS) algorithm is a classical algorithm applied to recover the phase, but it most likely stagnantes after a few iterations. This paper proposes a hybrid iterative algorithm of Amplitude Weighting and Phase Gradient Descent (AW-PGD) to generate a higher-quality POH. Firstly, the quadratic phase is used as the initial phase, zero-pads the periphery of the target image, and then multiplies the two to form the complex amplitude as the iterative initial value. During iteration, the amplitude of the reconstructed image is constrained by an adaptive dynamic exponential term in the signal region to improve the reconstruction accuracy, the constraint in the non-signal region is relaxed to reduce the computational effort at the same time; and the phase gradient descent technology is used to increase the iteration step and speed up the convergence. Finally, the target image amplitude is reconstructed based on the generated POH. The numerical simulation results show that the algorithm does not have a significant increase in time cost with better reconstruction quality than the GS, Weighted GS (WGS) and Adaptive Weighted GS (AWGS) algorithm.

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Optical image encryption and authentication using phase-only computer-generated hologram

Cited by 39 publications

References 30 publications

Watermarking algorithm based on phase-only CGH in fractional Hartley domain for DICOM images

Watermarking algorithm based on phase-only CGH in fractional Hartley domain for DICOM images

Optical voice encryption based on speckle-illuminated fourier ptychography and plaintext-related chaotic random phase mask

A Hybrid Iterative Algorithm of Amplitude Weighting and Phase Gradient Descent for Generating Phase-Only Fourier Hologram

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