dc.contributor.author | Karitans, Varis | |
dc.contributor.author | Tokmakovs, Andrejs | |
dc.contributor.author | Antonuka, Adele | |
dc.date.accessioned | 2022-09-06T17:20:10Z | |
dc.date.available | 2022-09-06T17:20:10Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 0078-5466 | |
dc.identifier.uri | https://opticaapplicata.pwr.edu.pl/article.php?id=2021200257 | |
dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/61136 | |
dc.description | Acknowledgements – The authors are supported by the postdoctoral project (1.1.1.2/16/I/001; 1.1.1.2/ VIAA/1/16/199, State Education Development Agency, Republic of Latvia). | en_US |
dc.description.abstract | In the current study, we investigate the effect of uniform white noise, Poisson noise and a constant background on the phase retrieval of pure phase objects. We also study the influence of the aforementioned factors on phase retrieval at different bit depths of intensity measurements. An algorithm called PhaseLift is used for phase retrieval as it requires a small number of modulating masks and can retrieve the phase of an object from sparse intensity measurements of low bit depth. A test object is modulated by eight random masks generated from a single mask and the phase of the object is retrieved from coded diffraction patterns. Different levels of uniform white noise, Poisson noise and constant background are superimposed on the diffraction patterns and the root-mean-square error (RMSE) of the retrieved object is calculated at each level. The results suggest that Poisson noise and a constant background at the same level cause similar RMSE compared to uniform white noise. Lowering the bit depth from 18-bits to 14-bits resulted in the decrease of the RMSE caused by Poisson noise and a constant background. We conclude that the effects of noise and constant background can be reduced by lowering the bit depth. © 2021 WrocÅ‚aw University of Science and Technology. All rights reserved. | en_US |
dc.description.sponsorship | State Education Development Agency Republic of Latvia 1.1.1.2/16/I/001; 1.1.1.2/ VIAA/1/16/199; The Institute of Solid State Physics, University of Latvia (Latvia), as the Centre of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-Teaming Phase2 under grant agreement No. 739508, project CAMART2. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Oficyna Wydawnicza Politechniki Warszawskiej | en_US |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
dc.relation.ispartofseries | Optica Applicata;51 (2) | |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Research Subject Categories::NATURAL SCIENCES::Physics | en_US |
dc.subject | phase retrieval | en_US |
dc.subject | phase problem | en_US |
dc.subject | diffraction | en_US |
dc.title | The effect of noise, a constant background, and bit depth on the phase retrieval of pure phase objects | en_US |
dc.type | info:eu-repo/semantics/article | en_US |
dc.identifier.doi | 10.37190/oa210209 | |