Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Phase-only encryption and watermarking based on phase-shifting interferometry

Not Accessible

Your library or personal account may give you access

Abstract

Generally, the reconstruction of an object image from its diffraction field requires both the amplitude and the phase information of this field. We systematically investigated the effects of using only the real part, the imaginary part, or the phase information of the diffraction field to reconstruct the original image for both the binary and the gray-level images. We show that the phase information can yield a better result of image retrieval than the real or imaginary part and that the recovered image from the phase information is satisfactory especially for binary input. On the basis of this idea, a new technique of image encryption and watermarking by use of only one delivered image—the phase map of the diffraction field of the original image—through double random-phase encoding is proposed and verified by computer simulations with phase-shifting interferometry. This method can greatly cut down the communication load and is suitable for Internet transmission.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Digital image encryption and watermarking by phase-shifting interferometry

Lu-Zhong Cai, Ming-Zhao He, Qing Liu, and Xiu-Lun Yang
Appl. Opt. 43(15) 3078-3084 (2004)

Digital color image watermarking based on phase-shifting interferometry and neighboring pixel value subtraction algorithm in the discrete-cosine-transform domain

Xiang-Feng Meng, Lu-Zhong Cai, Xiu-Lun Yang, Xian-Feng Xu, Guo-Yan Dong, Xiao-Xia Shen, Hao Zhang, and Yu-Rong Wang
Appl. Opt. 46(21) 4694-4701 (2007)

Watermarks encrypted in a concealogram and deciphered by a modified joint-transform correlator

David Abookasis, Ofir Montal, Ohad Abramson, and Joseph Rosen
Appl. Opt. 44(15) 3019-3023 (2005)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved