| Paper Abstract and Keywords |
| Presentation |
2021-02-18 15:15
A study on avoiding phase-retrieval stagnation for ptychography
Ryo Ozawa (Muroran IT), Yosuke Maehara (DOWELL), Asahi Takaoka, Hiroyuki Shioya (Muroran IT) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Diffractive imaging is a method of reconstructing an image from an observed diffraction pattern, in which a computer substitutes the function of lenses. By irradiating an object with radiation or electron beam, the Fourier intensity of the object is observed, but not the Fourier phase. Therefore, GS algorithm has been used to retrieve the Fourier phase. The algorithm repeats imposition of real / inverse constraints and Fourier transform. Ptychography enables imaging of objects which are larger than the beam diameter and complex objects. This method retrieves Fourier phases in multiple regions of an object with each observed Fourier intensity if the overlap ratio is sufficient. However, when the overlap ratio is insufficient, retrieving Fourier phase is stagnant. In this paper, we propose a local search method on ptychography to avoid the stagnation. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Diffractive imaging / Ptychography / Complex phase retrieval / / / / / |
| Reference Info. |
ITE Tech. Rep. |
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| Conference Information |
| Committee |
IEICE-IE IEICE-ITS MMS ME AIT |
| Conference Date |
2021-02-18 - 2021-02-19 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Online |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Image Processing, etc. |
| Paper Information |
| Registration To |
IEICE-IE |
| Conference Code |
2021-02-IE-ITS-MMS-ME-AIT |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
A study on avoiding phase-retrieval stagnation for ptychography |
| Sub Title (in English) |
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| Keyword(1) |
Diffractive imaging |
| Keyword(2) |
Ptychography |
| Keyword(3) |
Complex phase retrieval |
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| 1st Author's Name |
Ryo Ozawa |
| 1st Author's Affiliation |
Muroran Institute of Technology (Muroran IT) |
| 2nd Author's Name |
Yosuke Maehara |
| 2nd Author's Affiliation |
DOWELL Corporation (DOWELL) |
| 3rd Author's Name |
Asahi Takaoka |
| 3rd Author's Affiliation |
Muroran Institute of Technology (Muroran IT) |
| 4th Author's Name |
Hiroyuki Shioya |
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Muroran Institute of Technology (Muroran IT) |
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| Speaker |
Author-1 |
| Date Time |
2021-02-18 15:15:00 |
| Presentation Time |
25 minutes |
| Registration for |
IEICE-IE |
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| Volume (vol) |
vol.45 |
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