Journal ArticleDOI
Multiplexing and encryption of images using phase grating and random phase mask
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TLDR
A scheme to securely store and encrypt multiple images using sinusoidal phase grating is highlighted and it is possible to independently store, encrypt, and retrieve multiple images due to absence of aliasing problem.Abstract:
Recent developments in the areas of image processing have guided a new paradigm for research work in communication of images over the internet. Hence, secure storage and retrieval of digital images is a demanding task for future communication services. A scheme to securely store and encrypt multiple images using sinusoidal phase grating is highlighted. In the proposed scheme, images are modulated using different spatial frequencies and orientation angles. In addition, images have been encrypted using random phase mask after filtering. In order to avoid any human intervention in the system, an intensity graph is plotted to retrieve the images by applying inverse Fourier transform. Using this method, it is possible to independently store, encrypt, and retrieve multiple images due to absence of aliasing problem.read more
Citations
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Book ChapterDOI
Compression of High-Resolution Satellite Images Using Optical Image Processing
TL;DR: This chapter presents a novel method for compressing satellite imagery using phase grating to facilitate the optimization of storage space and bandwidth in satellite communication and proves that size of the extracted image is less than the original image.
Journal ArticleDOI
A novel medical image encryption using cyclic coding in COVID-19 pandemic situation
TL;DR: In this paper, a novel approach of medical image encryption using cyclic coding was presented, which is suitable for efficient encoding of multiple medical images using correlation coefficients, and the effectiveness of the proposed scheme was proved using correlation coefficient.
Journal ArticleDOI
Reduction of polarization loss of five-splitting by T-shaped arrays
Jimin Fang,Bo Wang +1 more
TL;DR: In this paper, a T-shaped reflection grating was proposed to reduce the polarization loss in equal-intensity laser output under normal incidence, which can operate simultaneously with either TE or TM polarizations.
Book ChapterDOI
Compression and multiplexing of medical images using optical image processing
TL;DR: In this chapter, a new scheme for storing and recovering multiple medical images using a sinusoidal amplitude grating has been proposed, to provide efficient storage and quick transmission of medical images.
Journal ArticleDOI
Efficient Storage and Encryption of 32-Slice CT Scan Images Using Phase Grating
TL;DR: In this paper , a new method using phase grating to multiplex as well as encrypting 32 cross-sectional CT scan images (slices) in a single canvas for optimization of storage space and improvement of security.
References
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Journal ArticleDOI
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TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Journal ArticleDOI
Optical image encryption based on input plane and Fourier plane random encoding.
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.
Journal ArticleDOI
A Privacy-Preserving and Copy-Deterrence Content-Based Image Retrieval Scheme in Cloud Computing
TL;DR: A unique watermark is directly embedded into the encrypted images by the cloud server before images are sent to the query user, and when image copy is found, the unlawful query user who distributed the image can be traced by the watermark extraction.
Journal ArticleDOI
Multiple-image encryption by wavelength multiplexing.
Guohai Situ,Jingjuan Zhang +1 more
TL;DR: This work introduces the technique of wavelength multiplexing into a double random-phase encoding system to achieve multiple-image encryption and analyzes the minimum separation between two adjacentmultiplexing wavelengths through cross talk and the multiplexed capacity through the correlation coefficient.
PatentDOI
Encrypted holographic data storage based on orthogonal phase code multiplexing
TL;DR: An encrypted holographic data-storage system that combines orthogonal-phase-code multiplexing with a random-phase key that retains the low cross-talk performance and the minimum code storage requirements typical in an orthogonic- phase-code-multiplexing system is described.