Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram
نویسندگان
چکیده
منابع مشابه
Wavelength multiplexing multiple-image encryption using cascaded phase-only masks in the Fresnel transform domain.
We propose a method of wavelength multiplexing based on a modified Gerchberg-Saxton algorithm (MGSA) and a cascaded phase modulation scheme in the Fresnel transform domain to reduce the cross talk in the multiple-image-encryption framework. First, each plain image is encoded to a complex function by using the MGSA. Next, the phase components of the created complex functions are multiplexed with...
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What we believe to be a new technique, based on a modified Gerchberg-Saxton algorithm (MGSA) and a phase modulation scheme in the Fresnel-transform domain, is proposed to reduce cross talks existing in multiple-image encryption and multiplexing. First, each plain image is encoded and multiplexed into a phase function by using the MGSA and a different wavelength/position parameter. Then all the ...
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Optical verification systems can make image hide in high-security phase key through the phase retrieval operation Conventionally, optical verification systems based on the joint transform correlator usually use Fourier transform. In this paper we propose the joint Fresnel transform architecture and use the methods of the projection onto constraint set and nonlinear transform to determine the p...
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The studies that have been carried out so far, the reconstruction process of the phase hologram can be realized by a single phase hologram. In this study, on the basis of a single phase hologram, this process will be carried out with the phase information which is obtained from a single hologram. To reconstruct the test object image, two different methods will be used: (1) the image will be rec...
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ژورنال
عنوان ژورنال: Photonics
سال: 2019
ISSN: 2304-6732
DOI: 10.3390/photonics7010001