Journal ArticleDOI
Encrypting three-dimensional information with digital holography
Enrique Tajahuerce,Bahram Javidi +1 more
TLDR
A method for optical encryption of three-dimensional (3D) information by use of digital holography using a phase-shifting interferometer and an intensity-recording device.Abstract:
A method for optical encryption of three-dimensional (3D) information by use of digital holography is presented. A phase-shifting interferometer records the phase and amplitude information generated by a 3D object at a plane located in the Fresnel diffraction region with an intensity-recording device. Encryption is performed optically by use of the Fresnel diffraction pattern of a random phase code. Images of the 3D object with different perspectives and focused at different planes can be generated digital or optically after decryption with the proper key. Experimental results are presented.read more
Citations
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Journal ArticleDOI
Multiple-image authentication with a cascaded multilevel architecture based on amplitude field random sampling and phase information multiplexing.
Desheng Fan,Xiangfeng Meng,Yurong Wang,Xiulun Yang,Xuemei Pan,Xiang Peng,Wenqi He,Guoyan Dong,Hongyi Chen +8 more
TL;DR: A multiple-image authentication method with a cascaded multilevel architecture in the Fresnel domain is proposed, in which a synthetic encoded complex amplitude is first fabricated, and its real amplitude component is generated by iterative amplitude encoding, random sampling, and space multiplexing for the low-level certification images.
Journal ArticleDOI
Digital image synthesis and multiple-image encryption based on parameter multiplexing and phase-shifting interferometry
Xiangfeng Meng,Xiangfeng Meng,Lu-Zhong Cai,Yancai Wang,X. L. Yang,X.F. Xu,Guoyan Dong,X.X. Shen +7 more
TL;DR: A novel digital image synthesis and multiple-image encryption technique based on parameter multiplexing and phase-shifting interferometry by discrete Fresnel transform is proposed, which is simple with a lensless setup, highly secure, and particularly suitable for the image transmission via Internet.
Journal ArticleDOI
A 3D image encryption technique using computer-generated integral imaging and cellular automata transform
TL;DR: Experimental results show that the proposed scheme outperforms conventional encryption methods, and CAT as an orthogonal transformation offers considerable simplicity in the calculation of the transform coefficient compared with the traditional complicated transform process.
Journal ArticleDOI
Digital Fresnel field encryption for three-dimensional information security
TL;DR: A single random-phase Fourier plane encoding leads to a single-step reconstruction of the complex object field from the encrypted Fresnel field, thus saving computational power, and the algorithm is explained with experimental results to support the proof of the concept.
Journal ArticleDOI
3D object hiding using three-dimensional ptychography
TL;DR: Owing to the introduction of probe keys, the security of the ptychography-based hiding system is significantly enhanced and the feasibility and imperceptibility of the proposed method are demonstrated.
References
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Philippe Réfrégier,Bahram Javidi +1 more
TL;DR: A new optical encoding method of images for security applications is proposed and it is shown that the encoding converts the input signal to stationary white noise and that the reconstruction method is robust.
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Phase-shifting digital holography
Ichirou Yamaguchi,Tong Zhang +1 more
TL;DR: A new method is proposed in which the distribution of complex amplitude at a plane is measured by phase-shifting interferometry and then Fresnel transformed by a digital computer, which can reconstruct an arbitrary cross section of a three-dimensional object with higher image quality and a wider viewing angle than from conventional digital holography using an off-axis configuration.
Journal ArticleDOI
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Ulf Schnars,W. Jüptner +1 more
TL;DR: The principle of recording holograms directly on a CCD target is described and a real image of the object is reconstructed from the digitally sampled hologram by means of numerical methods.
Journal Article
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