Hybrid image cryptosystem based on dyadic phase displacement in the frequency domain

Chang, Y.C.; Chang, Hsuan; Kuo, C.J.

doi:10.1016/j.optcom.2004.03.037

Cited by 17 publications

(7 citation statements)

References 10 publications

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“…According to the Huygen-Fresnel principle [6], the light distribution g(x , y ) on the rotated reconstruction plane, when the POF plane is also rotated, can be determined from the Fresnel diffraction of the POF h x 0 , y 0 . Let r x = x 0 cos φ x − x cos θ x , r y = y 0 cos φ y − y cos θ y , and r z = z 0 + x 0 sin φ x + y 0 sin φ y − x sin θ x − y sin θ y .…”

Section: Preliminariesmentioning

confidence: 99%

“…Under this condition, the distance r should be modified according to translation (u n , v n ) for each target image. Equation (6) shows the determination of new distancer 1,n for a translated image g n in this optical architecture:r…”

Section: Tfrtmentioning

confidence: 99%

“…Otherwise, no images can be reconstructed, and only the noise-like patterns are shown at the plane. The distancê r 3,n between the two rotated planes can be determined by using the same equation as Equation (6). That is,r 3,n =r 1,n .…”

Section: Double Angle Multiplexing At the Both Planesmentioning

confidence: 99%

“…Javidi first proposed a double-random-phase encoding (DRPE) method to encrypt an image into a noise-like complex signal [2]. Thereafter, optics-based encryption methods utilizing on Fourier, fractional Fourier, or Fresnel transforms (FrT) with various optical architectures have been aggressively developed for image encryption and verification uses [2][3][4][5][6][7][8][9][10][11]. The optical architecture for performing the FrT is the simplest, because no lenses are required.…”

Section: Introductionmentioning

confidence: 99%

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Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

2019

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We propose an angle multiplexing method for optics-based image encryption using a phase-only computer-generated hologram (POCGH) in the tilted Fresnel transform (TFrT) domain. Modified Gerchberg-Saxton algorithms, based on the three types of rotation manipulation in both the hologram and reconstruction planes, are used with their corresponding TFrT parameters to extract the phase-only functions (POFs) of the target images. All the extracted POFs are then phase-modulated and summed to obtain the final POCGH, which is capable of multiplexing and avoiding overlap in the reconstructed images. The computer simulation results show that the images corresponding to the various rotation manipulations at the hologram and image reconstruction planes can be successfully restored with high correlation coefficients. Due to the encrypted nature of the multiplexed images, a higher system security level can be achieved, as the images can only be correctly displayed when all the required parameters in the TFrT are available. The angle sensitivity on the image quality for each manipulation is also investigated.

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Section: Preliminariesmentioning

confidence: 99%

Section: Tfrtmentioning

confidence: 99%

Section: Double Angle Multiplexing At the Both Planesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

2019

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“…Some random elements, such as phase, 1 amplitude 24 and position order, [25][26][27][28][29][30] can be used for the key of image encryption algorithm. Hennelly and Sheridan 25 had proposed an optical image encryption algorithm by use of random shifting.…”

Section: Introductionmentioning

confidence: 99%

Image encryption based on random scrambling of the amplitude and phase in the frequency domain

Liu

Dai

et al. 2009

Opt. Eng

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We propose an image encryption algorithm by using random position scrambling of the amplitude and phase functions in the frequency domain of optical transform. The positions of amplitude and phase data are scrambled randomly in the horizontal or vertical direction. The random position orders can be regarded as the key of the algorithm. Moreover, random phase encoding is not used in the proposed algorithm. A feasible optical implementation of the encryption algorithm is given. Some numerical simulations have demonstrated the capability of the algorithm.

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Optical Security System by Using Image Dyadic Displacement and Manipulations in Fractional Fourier Domain

Chang

Lee

et al. 2014

Lecture Notes in Electrical Engineering

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Hybrid image cryptosystem based on dyadic phase displacement in the frequency domain

Cited by 17 publications

References 10 publications

Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

Image encryption based on random scrambling of the amplitude and phase in the frequency domain

Optical Security System by Using Image Dyadic Displacement and Manipulations in Fractional Fourier Domain

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