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Optical Engineering • new

Data preprocessing methods for robust Fourier ptychographic microscopy
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Paper Abstract

Fourier ptychographic microscopy (FPM) is a recently developed computational imaging technique that achieves gigapixel images with both high resolution and large field-of-view. In the current FPM experimental setup, the dark-field images with high-angle illuminations are easily overwhelmed by stray lights and background noises due to the low signal-to-noise ratio, thus significantly degrading the achievable resolution of the FPM approach. We provide an overall and systematic data preprocessing scheme to enhance the FPM’s performance, which involves sampling analysis, underexposed/overexposed treatments, background noises suppression, and stray lights elimination. It is demonstrated experimentally with both US Air Force (USAF) 1951 resolution target and biological samples that the benefit of the noise removal by these methods far outweighs the defect of the accompanying signal loss, as part of the lost signals can be compensated by the improved consistencies among the captured raw images. In addition, the reported nonparametric scheme could be further cooperated with the existing state-of-the-art algorithms with a great flexibility, facilitating a stronger noise-robust capability of the FPM approach in various applications.

Paper Details

Date Published: 15 December 2017
PDF: 9 pages
Opt. Eng. 56(12) 123107 doi: 10.1117/1.OE.56.12.123107
Published in: Optical Engineering Volume 56, Issue 12
Show Author Affiliations
Yan Zhang, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Univ. of Chinese Academy of Sciences (China)
An Pan, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Univ. of Chinese Academy of Sciences (China)
Ming Lei, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Baoli Yao, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Shanxi Univ. (China)


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