Indian Science Technology and Engineering facilities Map
 
Supplier Map
Service Map

Publications

Publication Details

Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
A. Fatima and N. K. Nishchal 
Corresponding Authors:
N. K. Nishchal 
DOI #:
https://doi.org/10.1364/JOSAA.35.001053 
Title:
Image authentication using vector beam with sparse phase information 
Journal:
Journal of Optical Society of America A  
Year:
2018 
Volume:
35 
Page:
1053- 1062 
Keywords:
vector beam, sparse phase information 
Abstract:
We propose a novel optical information authentication scheme that uses Stokes polarimetry of vector beams. Phase-only functions of the plaintext are generated using a modified Gerchberg–Saxton algorithm. Partial information of these phase functions is used to tailor the phase of a vector beam. The Stokes parameters recording of the vector beam generates the ciphertext, which contains sparse information of the input image. In contrast to most authentication schemes, the proposed scheme can authenticate two images from a single real ciphertext. Computer simulation results prove the feasibility of the proposed scheme. 
Entered by:
Physics Head on 2020-08-03 
 
THE VISION
THE MISSION
ABOUT I-STEM
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work
read more >>

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Hosted at Indian Institute of Science
Copyright © 2024 I-STEM. All rights reserved.
Audited by: STQC Bengaluru.