Adjustable frequency filtering and weighted feedback for iterative phase retrieval under noisy conditions
Abstract
In coherent diffraction imaging (CDI) systems, the results of phase retrieval could be deteriorated by the inevitable experimental noise. To address the problem, a noise-robust algorithm is designed with weighted feedback and adjustable frequency filtering. The frequency filter serves as the smoothness constraint and has an adaptive parameter during iterations, to suppress the noise as well as avoid the convergence stagnancy of iterative phase retrieval. Numerical simulations and experimental results demonstrate that the proposed algorithm is superior in reconstruction quality under noisy conditions and increases the convergence speed. Furthermore, the minimum acceptable number of measurements of diffracting images is reduced. This work is beneficial to data synthesis in CDI systems.
Additional Information
© 2019 Elsevier Ltd. Received 10 April 2019, Revised 15 July 2019, Accepted 16 July 2019, Available online 27 July 2019. This work was supported by the National Natural Science Foundation of China (nos. 61575055, 61575053, and 11874132), and Open Fund Project Foundation of Guangdong Provincial Key Laboratory of Modern Geometric and Mechanical Metrology Technology (SCMKF201804). The authors are indebted to two reviewers for helpful comments and suggestions. The authors also warmly thank Dr. Hang Chen for his help.Attached Files
Supplemental Material - 1-s2.0-S0143816619304713-mmc1.xml
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Additional details
- Eprint ID
- 99113
- DOI
- 10.1016/j.optlaseng.2019.105808
- Resolver ID
- CaltechAUTHORS:20191007-114918858
- 61575055
- National Natural Science Foundation of China
- 61575053
- National Natural Science Foundation of China
- 11874132
- National Natural Science Foundation of China
- SCMKF201804
- Guangdong Provincial Key Laboratory of Modern Geometric and Mechanical Metrology Technology
- Created
-
2019-10-07Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field