Ptychographic reconstruction with wavefront initialization Article Swipe
Felix Wittwer
,
Peter Modregger
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2205.11996
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2205.11996
X-ray ptychography is a cutting edge imaging technique providing ultra-high spatial resolutions. In ptychography, phase retrieval, i.e., the recovery of a complex valued signal from intensity-only measurements, is enabled by exploiting a redundancy of information contained in diffraction patterns measured with overlapping illuminations. For samples that are considerably larger than the probe we show that during the iteration the bulk information has to propagate from the sample edges to the center. This constitutes an inherent limitation of reconstruction speed for algorithms that use a flat initialization. Here, we experimentally demonstrate that a considerable improvement of computational speed can be achieved by utilizing a low resolution sample wavefront retrieved from measured diffraction patterns as initialization. In addition, we show that this approach avoids phase singularity artifacts due to strong phase gradients. Wavefront initialization is computationally fast and compatible with non-bulky samples. Therefore, the presented approach is readily adaptable with established ptychographic reconstruction algorithms implying a wide spread use.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2205.11996
- https://arxiv.org/pdf/2205.11996
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4281553488
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4281553488Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2205.11996Digital Object Identifier
- Title
-
Ptychographic reconstruction with wavefront initializationWork title
- Type
-
preprintOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2022Year of publication
- Publication date
-
2022-05-22Full publication date if available
- Authors
-
Felix Wittwer, Peter ModreggerList of authors in order
- Landing page
-
https://arxiv.org/abs/2205.11996Publisher landing page
- PDF URL
-
https://arxiv.org/pdf/2205.11996Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://arxiv.org/pdf/2205.11996Direct OA link when available
- Concepts
-
Initialization, Ptychography, Phase retrieval, Wavefront, Redundancy (engineering), Computer science, Optics, Algorithm, Diffraction, Sample (material), Phase (matter), Physics, Fourier transform, Operating system, Programming language, Thermodynamics, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
0Total citation count in OpenAlex
- Related works (count)
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10Other works algorithmically related by OpenAlex
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| abstract_inverted_index.computational | 95 |
| abstract_inverted_index.measurements, | 26 |
| abstract_inverted_index.ptychographic | 149 |
| abstract_inverted_index.ptychography, | 13 |
| abstract_inverted_index.experimentally | 88 |
| abstract_inverted_index.illuminations. | 42 |
| abstract_inverted_index.initialization | 131 |
| abstract_inverted_index.intensity-only | 25 |
| abstract_inverted_index.reconstruction | 77, 150 |
| abstract_inverted_index.computationally | 133 |
| abstract_inverted_index.initialization. | 85, 113 |
| cited_by_percentile_year | |
| countries_distinct_count | 0 |
| institutions_distinct_count | 2 |
| sustainable_development_goals[0].id | https://metadata.un.org/sdg/11 |
| sustainable_development_goals[0].score | 0.7900000214576721 |
| sustainable_development_goals[0].display_name | Sustainable cities and communities |
| citation_normalized_percentile.value | 0.04817697 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |