Advances in optical visual information security: a comprehensive review

Sachin, R Kumar, Sakshi, R Yadav, SG Reddy… - Photonics, 2024‏ - mdpi.com
In the modern era, the secure transmission and storage of information are among the utmost
priorities. Optical security protocols have demonstrated significant advantages over digital …

Single-channel color image encryption based on iterative fractional Fourier transform and chaos

L Sui, B Gao - Optics & Laser Technology, 2013‏ - Elsevier
A single-channel color image encryption is proposed based on iterative fractional Fourier
transform and two-coupled logistic map. Firstly, a gray scale image is constituted with three …

Nonlinear QR code based optical image encryption using spiral phase transform, equal modulus decomposition and singular value decomposition

R Kumar, B Bhaduri, NK Nishchal - Journal of Optics, 2017‏ - iopscience.iop.org
In this study, we propose a quick response (QR) code based nonlinear optical image
encryption technique using spiral phase transform (SPT), equal modulus decomposition …

Three-dimensional silicon micromachining

S Azimi, J Song, ZY Dang, HD Liang… - Journal of …, 2012‏ - iopscience.iop.org
A process for fabricating arbitrary-shaped, two-and three-dimensional silicon and porous
silicon components has been developed, based on high-energy ion irradiation, such as 250 …

Phase imaging based on modified transport of intensity equation using liquid crystal variable retarder with partial coherent illumination

AK Gupta, A Fatima, NK Nishchal, T Nomura - Optical Review, 2020‏ - Springer
In this paper, we demonstrate a non-interferometric phase imaging technique based on
modified transport of intensity equation (TIE) through a liquid crystal variable retarder …

Experimental optical encryption with full<? TeX\break?> complex modulation

JA González-Moncada, A Velez-Zea… - Applied Optics, 2024‏ - opg.optica.org
We present, to our knowledge, a novel method to achieve experimental encryption using
double random phase encoding with full complex modulation and a single phase-only …

Asymmetric image encryption and authentication based on equal modulus decomposition in the Fresnel transform domain

G Luan, A Li, D Zhang, D Wang - IEEE Photonics Journal, 2018‏ - ieeexplore.ieee.org
A novel asymmetric image encryption and authentication scheme based on equal modulus
decomposition (EMD) in the Fresnel transform domain is proposed. First, the Fresnel …

Transport of intensity equation based photon-counting phase imaging

AK Gupta, NK Nishchal, PP Banerjee - OSA Continuum, 2020‏ - opg.optica.org
In low light conditions, such as in astronomy and non-invasive bio-imaging applications, the
imaging performance is mostly degraded due to noise. In this paper, we demonstrate a …

Cryptoanalysis on the image encryption scheme based on interference and an amplitude mask

Y **ong, J Du, C Quan - Optics Communications, 2022‏ - Elsevier
In this paper, the security of the optical image cryptosystem based on interference and an
amplitude mask has been evaluated. The silhouette problem existing in the conventional …

Three-dimensional information encryption and anticounterfeiting using digital holography

MT Shiu, YK Chew, HT Chan, XY Wong, CC Chang - Applied Optics, 2015‏ - opg.optica.org
In this work, arbitrary micro phase-step digital holography with optical interferometry and
digital image processing is utilized to obtain information about an image of a three …