Journal ArticleDOI
Digital image watermarking using gyrator transform and chaotic maps
Narendra Singh,Aloka Sinha +1 more
TLDR
Robustness of the proposed technique has been evaluated in terms of the chaotic maps, the number of the Chaos maps used to generate the CRPM, the rotation angle of the gyrator transform and the seed values of the chaos random phase masks.About:
This article is published in Optik.The article was published on 2010-09-01. It has received 26 citations till now. The article focuses on the topics: Chaotic & Ikeda map.read more
Citations
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Journal ArticleDOI
A novel chaos-based fragile watermarking for image tampering detection and self-recovery
TL;DR: A novel watermarking approach is proposed to provide enhanced tampering localization and self-recovery and an optimization scheme is given to make the recovered image have advanced visual effects.
Journal ArticleDOI
Double phase-image encryption using gyrator transforms, and structured phase mask in the frequency plane
TL;DR: The use of a structured phase mask enhances the key space for encryption and also overcomes the problem of axis alignment associated with an optical set-up and is likely to provide enhanced security in view of the increased number of encryption parameters.
Journal ArticleDOI
Fully phase image encryption using double random-structured phase masks in gyrator domain
TL;DR: The computed values of mean squared error between the retrieved and the original image show the efficacy of the proposed scheme, and the scheme's sensitivity to the encryption parameters, and robustness against occlusion and multiplicative Gaussian noise attacks are investigated.
Journal ArticleDOI
A phase-image watermarking scheme in gyrator domain using devil's vortex Fresnel lens as a phase mask
TL;DR: The DVFL provides much-desired parameter-rich phase masks which contribute to the enhanced security of the scheme in addition to overcoming the problem of axis alignment in the optical setup, and is examined for its robustness against occlusion and noise attacks.
Journal ArticleDOI
Group multiple-image encoding and watermarking using coupled logistic maps and gyrator wavelet transform.
TL;DR: A novel method of group multiple-image encoding and watermarking using coupled logistic maps and gyrator wavelet transform is presented and a high level of security can be achieved.
References
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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.
Book
Chaos: An Introduction to Dynamical Systems
TL;DR: One-dimensional maps, two-dimensional map, fractals, and chaotic attraction attractors have been studied in this article for state reconstruction from data, including the state of Washington.
Book
The Fractional Fourier Transform: with Applications in Optics and Signal Processing
TL;DR: The fractional Fourier transform (FFT) as discussed by the authors has been used in a variety of applications, such as matching filtering, detection, and pattern recognition, as well as signal recovery.
Journal ArticleDOI
Image encryption using chaotic logistic map
TL;DR: The results of several experimental, statistical analysis and key sensitivity tests show that the proposed image encryption scheme provides an efficient and secure way for real-time image encryption and transmission.