Automatic fringe pattern enhancement using truly adaptive period-guided bidimensional empirical mode decomposition

Paweł Gocłowski , Maciej Trusiak , Ahmad Azeem , Adam Styk , Mico Vicente , Balpreet S. Ahluwalia , Krzysztof Patorski


Fringe patterns encode the information about the result of a measurement performed via widely used optical full-field testing methods, e.g., interferometry, digital holographic microscopy, moiré techniques, structured illumination etc. Affected by the optical setup, changing environment and the sample itself fringe patterns are often corrupted with substantial noise, strong and uneven background illumination and exhibit low contrast. Fringe pattern enhancement, i.e., noise minimization and background term removal, at the pre-processing stage prior to the phase map calculation (for the measurement result decoding) is therefore essential to minimize the jeopardizing effect the mentioned error sources have on the optical measurement outcome. In this contribution we propose an automatic, robust and highly effective fringe pattern enhancement method based on the novel period-guided bidimensional empirical mode decomposition algorithm (PG-BEMD). The spatial distribution of the fringe period is estimated using the novel windowed approach and then serves as an indicator for the truly adaptive decomposition with the filter size locally adjusted to the fringe pattern density. In this way the fringe term is successfully extracted in a single (first) decomposition component alleviating the cumbersome mode mixing phenomenon and greatly simplifying the automatic signal reconstruction. Hence, the fringe term is dissected without the need for modes selection nor summation. The noise removal robustness is ensured employing the block matching 3D filtering of the fringe pattern prior to its decomposition. Performance validation against previously reported modified empirical mode decomposition techniques is provided using numerical simulations and experimental data verifying the versatility and effectiveness of the proposed approach.
Author Paweł Gocłowski (FM / IMPh)
Paweł Gocłowski,,
- The Institute of Micromechanics and Photonics
, Maciej Trusiak (FM / IMPh)
Maciej Trusiak,,
- The Institute of Micromechanics and Photonics
, Ahmad Azeem - Department of Physics and Technology [UiT The Arctic University of Norway]
Ahmad Azeem,,
, Adam Styk (FM / IMPh)
Adam Styk,,
- The Institute of Micromechanics and Photonics
, Mico Vicente - University of Valencia
Mico Vicente,,
, Balpreet S. Ahluwalia - Department of Physics and Technology [UiT The Arctic University of Norway]
Balpreet S. Ahluwalia,,
, Krzysztof Patorski (FM / IMPh)
Krzysztof Patorski,,
- The Institute of Micromechanics and Photonics
Journal seriesOptics Express, ISSN 1094-4087
Issue year2020
Publication size in sheets0.8
Keywords in Englishfringe analysis, phase contrast, phase measurement, spatial frequency, speckle interferometry, structured illumination microscopy
ASJC Classification3107 Atomic and Molecular Physics, and Optics
Languageen angielski
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 07-09-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.567; WoS Impact Factor: 2018 = 3.561 (2) - 2018=3.531 (5)
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