Image Reconstruction Using Autofocus in Single-Lens System
To reconstruct the wavefront in a single-lens coherent diffraction imaging (CDI) system, we propose a closed-loop cascaded iterative engine (CIE) algorithm based on the known information of the imaging planes. The precision of diffraction distance is an important prerequisite for a perfect reconstru...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/3/1378 |
| _version_ | 1797489134589181952 |
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| author | Xuyang Zhou Xiu Wen Yu Ji Yutong Li Shutian Liu Zhengjun Liu |
| author_facet | Xuyang Zhou Xiu Wen Yu Ji Yutong Li Shutian Liu Zhengjun Liu |
| author_sort | Xuyang Zhou |
| collection | DOAJ |
| description | To reconstruct the wavefront in a single-lens coherent diffraction imaging (CDI) system, we propose a closed-loop cascaded iterative engine (CIE) algorithm based on the known information of the imaging planes. The precision of diffraction distance is an important prerequisite for a perfect reconstruction of samples. For coherent diffraction imaging with a lens, autofocus is investigated to accurately determine the object distance and image distance. For the case of only the object distance being unknown, a diffuser is used to scatter the coherent beam for speckle illumination to improve the performance of autofocus. The optimal object distance is obtained stably and robustly by combing speckle imaging with clarity evaluation functions. SSIM and MSE, using the average pixel value of the reconstructed data set as a reference, are applied on two-unknown-distance autofocus. Simulation and experiment results are presented to prove the feasibility of the CIE and proposed auto-focusing method. |
| first_indexed | 2024-03-10T00:13:10Z |
| format | Article |
| id | doaj.art-82450966fd624a98aae77fa407b6e4de |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T00:13:10Z |
| publishDate | 2022-01-01 |
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| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-82450966fd624a98aae77fa407b6e4de2023-11-23T15:56:35ZengMDPI AGApplied Sciences2076-34172022-01-01123137810.3390/app12031378Image Reconstruction Using Autofocus in Single-Lens SystemXuyang Zhou0Xiu Wen1Yu Ji2Yutong Li3Shutian Liu4Zhengjun Liu5School of Physics, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Physics, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Physics, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Physics, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Physics, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Physics, Harbin Institute of Technology, Harbin 150001, ChinaTo reconstruct the wavefront in a single-lens coherent diffraction imaging (CDI) system, we propose a closed-loop cascaded iterative engine (CIE) algorithm based on the known information of the imaging planes. The precision of diffraction distance is an important prerequisite for a perfect reconstruction of samples. For coherent diffraction imaging with a lens, autofocus is investigated to accurately determine the object distance and image distance. For the case of only the object distance being unknown, a diffuser is used to scatter the coherent beam for speckle illumination to improve the performance of autofocus. The optimal object distance is obtained stably and robustly by combing speckle imaging with clarity evaluation functions. SSIM and MSE, using the average pixel value of the reconstructed data set as a reference, are applied on two-unknown-distance autofocus. Simulation and experiment results are presented to prove the feasibility of the CIE and proposed auto-focusing method.https://www.mdpi.com/2076-3417/12/3/1378auto-focusingcoherent diffraction imagingsingle-lens system |
| spellingShingle | Xuyang Zhou Xiu Wen Yu Ji Yutong Li Shutian Liu Zhengjun Liu Image Reconstruction Using Autofocus in Single-Lens System Applied Sciences auto-focusing coherent diffraction imaging single-lens system |
| title | Image Reconstruction Using Autofocus in Single-Lens System |
| title_full | Image Reconstruction Using Autofocus in Single-Lens System |
| title_fullStr | Image Reconstruction Using Autofocus in Single-Lens System |
| title_full_unstemmed | Image Reconstruction Using Autofocus in Single-Lens System |
| title_short | Image Reconstruction Using Autofocus in Single-Lens System |
| title_sort | image reconstruction using autofocus in single lens system |
| topic | auto-focusing coherent diffraction imaging single-lens system |
| url | https://www.mdpi.com/2076-3417/12/3/1378 |
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