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Title: Virtually optical information verification with a hierarchical structure
Authors: Chen, W 
Issue Date: Jan-2018
Source: Optical engineering, Jan. 2018, v. 57, no. 1, 10502
Abstract: A virtually optical system with a hierarchical structure is designed for optical verification. At each hierarchical level, two phase-only masks are alternately generated using an iterative approach and then are sparsified. All sparse phase-only masks generated at the lower hierarchical levels are fixed and applied as constraints at the higher hierarchical level. Since sparse phase-only masks are applied for the decoding, the recovered images are invisible and instead can be further verified by a nonlinear correlation algorithm. The results are presented to show validity of the proposed method, and the proposed method provides a promising strategy for optical verification.
Keywords: Hierarchical structure
Optical information verification
Phase retrieval
Publisher: SPIE-International Society for Optical Engineering
Journal: Optical engineering 
ISSN: 0091-3286
EISSN: 1560-2303
DOI: 10.1117/1.OE.57.1.010502
Rights: Copyright 2018 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.
The following publication Chen, W. (2018). Virtually optical information verification with a hierarchical structure. Optical Engineering, 57(1), 010502 is available at
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