A kind of multilevel authentication system for multiple-image by modulated real part synthesis and iterative phase multiplexing. Issue 7 (11th April 2016)

• Record Type: Journal Article
• Authors: Pan, Xuemei; Meng, Xiangfeng; Wang, Yurong; Yang, Xiulun; Peng, Xiang; He, Wenqi; Dong, Guoyan; Chen, Hongyi
• Is Part Of: Journal of modern optics. Volume 63:Issue 7(2016)
• Page Start: 632
• Page End: 642
• Publication Date: 2016-04-11
• Subjects: image authentication -- phase retrieval -- phase multiplexing; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2015.1088585
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract : A kind of multilevel authentication system for multiple-image based on modulated real part synthesis and iterative phase multiplexing in the Fresnel domain is proposed. In the design process of the low-level authentication system, a series of normalized real part information are iteratively generated by phase retrieval algorithm in the Fresnel domain, and the final private keys for different individual low-level certification images can be fabricated by binary amplitude modulation, superposition, synthesis, and sampling; while in the design process of the high-level authentication system, the final private keys for different individual high-level certification images can be generated by iterative phase information encoding and multiplexing. During the high-level authentication, the meaningful certification image can be reconstructed by the inverse Fresnel transform with the corresponding correct private keys, meanwhile, the correlation coefficient is utilized as judgment criterion; while in the low-level authentication, with the help of correct keys, the noise-like image with meaningless information can be recovered, but a remarkable peak output in the nonlinear correlation coefficient can be generated, which is adopted as the criterion to judge whether the low-level authentication is successful or not. Theoretical analysis and numerical simulations both verify the feasibility of the proposed method.