Optical image encryption based on interference

Zhang, Yan; Wang, Bo

doi:10.1364/ol.33.002443

Cited by 384 publications

(182 citation statements)

References 16 publications

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“…This also means the higher the RE value of the single reconstructed image, the more irrelevant between the original image and the reconstructed image. However, when 0.2 RE > , theoretically, one cannot distinguish the decrypted image with the naked eye [15].…”

Section: _ ( )mentioning

confidence: 99%

“…Relative error ( RE ) is introduced as the criterion of the reconstructed image's quality and is expressed as follows [15]: where ( , ) R m n denotes the intensity of the reconstructed image and ( , ) O m n denotes the original image. We see that RE is smaller, and the gray-scale value of the reconstructed image is closer to the original image in terms of Eq.…”

Section: _ ( )mentioning

confidence: 99%

“…(11) and Eq. (15). However, the error appears when the CCD camera captures the optical field O P u v .…”

Section: Error Analysismentioning

confidence: 99%

“…Optical image split-encryption has been growing rapidly since Zhang and Wang suggested it for the first time [15]. The authors modulated the optical field in the Fresnel domain to two phase-only masks (POMs) to be allocated to two authorized users.…”

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confidence: 99%

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Optical Image Split-encryption Based on Object Plane for Completely Removing the Silhouette Problem

Li¹,

Phan²,

Jeon³

et al. 2013

Journal of the Optical Society of Korea

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We propose a split-encryption scheme on converting original images to multiple ciphertexts. This conversion introduces one random phase-only function (POF) to influence phase distribution of the preliminary ciphertexts. In the encryption process, the original image is mathematically split into two POFs. Then, they are modulated on a spatial light modulator one after another. And subsequently two final ciphertexts are generated by utilizing two-step phase-shifting interferometry. In the decryption process, a high-quality reconstructed image with relative error -31 7.6061 10 RE = × can be achieved only when the summation of the two ciphertexts is Fresnel-transformed to the reconstructed plane. During the verification process, any silhouette information was invisible in the two reconstructed images from different single ciphertexts. Both of the two single REs are more than 0.6, which is better than in previous research. Moreover, this proposed scheme works well with gray images.

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Section: _ ( )mentioning

confidence: 99%

Section: _ ( )mentioning

confidence: 99%

“…(11) and Eq. (15). However, the error appears when the CCD camera captures the optical field O P u v .…”

Section: Error Analysismentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Optical Image Split-encryption Based on Object Plane for Completely Removing the Silhouette Problem

Li¹,

Phan²,

Jeon³

et al. 2013

Journal of the Optical Society of Korea

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“…Holography has drawn great attention ever since it was proposed by Dennis Gabor in 1948 [1]. In recent years, apart from three-dimensional (3D) photography [2][3][4], there are increasingly additional applications of holography, such as watermarking [5,6], 3D measurement [7], and encryption [8][9][10]. Above all, data encoding with a holography technique may be one of the most investigated topics.…”

Section: Introductionmentioning

confidence: 99%

Implementation of single-beam multiplexing encoding with a dually modulated spatial light modulator

et al. 2010

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We propose a novel method for signal storage and encryption, called single-beam multiplexing encoding. The single beam is composed of an inside signal beam and an outside reference beam. The signal beam is amplitude modulated, and the reference beam is phase modulated. The dual modulation is implemented by a spatial light modulator (SLM). Multiplexing holography with different reference beams from different directions, called directional multiplexing, is analyzed in detail. With an SLM based on a twisted nematic liquid crystal display, we demonstrate a single-beam directional multiplexing method using a holographic encoding technique, and the retrieved signals are presented. This encoding system is more stable, miniaturized, and flexible. It should be of great interest for applications in signal encryption as well as for high-capacity data storage.

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