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.
Original language | English |
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Article number | 010502 |
Journal | Optical Engineering |
Volume | 57 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2018 |
Keywords
- hierarchical structure
- optical information verification
- phase retrieval
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Engineering