Nonlocal flat optics for size-selective image processing and denoising
Abstract All-optical image processing based on metasurfaces is a swiftly advancing field of technology, due to its high speed, large integrability and inherently low energy requirements. So far, the proposed devices have been focusing on canonical operations, such as differentiations to perform edge...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-05-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59765-4 |
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| author | Sandeep Kumar Chamoli Chunqi Jin Yandong Fan Mehdi Kiani Heedong Goh Chen Huang Shuyu Guo Yuntong Wang Fei Zhu Guohua Xing Bo Li Tian Bai Andrea Alù Wei Li |
| author_facet | Sandeep Kumar Chamoli Chunqi Jin Yandong Fan Mehdi Kiani Heedong Goh Chen Huang Shuyu Guo Yuntong Wang Fei Zhu Guohua Xing Bo Li Tian Bai Andrea Alù Wei Li |
| author_sort | Sandeep Kumar Chamoli |
| collection | DOAJ |
| description | Abstract All-optical image processing based on metasurfaces is a swiftly advancing field of technology, due to its high speed, large integrability and inherently low energy requirements. So far, the proposed devices have been focusing on canonical operations, such as differentiations to perform edge detection across all objects in a complex scene. Yet, undesired background noise and clutter can hinder such operations, requiring target selection with digital post-processing which inherently limits the overall accuracy, efficiency and speed. Here, we introduce an optical solution for real-time size-selective image processing and experimentally demonstrate the concept with a metal-dielectric-metal film performing a spatial band-pass filter in momentum space. We show high-resolution (~0.9 μm) edge detection and real-time dynamic denoising, ideally suited for bio-imaging applications and target recognitions. Our demonstrated k-space filtering metasurface expands the scope of nonlocal flat optics for analog image processing, ushering in opportunities for ultra-compact, cost-effective, and multifunctional image processors. |
| format | Article |
| id | doaj-art-516d8506f6ac43378aeabb87bca9ce43 |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-516d8506f6ac43378aeabb87bca9ce432025-08-20T01:51:36ZengNature PortfolioNature Communications2041-17232025-05-011611910.1038/s41467-025-59765-4Nonlocal flat optics for size-selective image processing and denoisingSandeep Kumar Chamoli0Chunqi Jin1Yandong Fan2Mehdi Kiani3Heedong Goh4Chen Huang5Shuyu Guo6Yuntong Wang7Fei Zhu8Guohua Xing9Bo Li10Tian Bai11Andrea Alù12Wei Li13GPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunPhotonics Initiative, Advanced Science Research Center, City University of New YorkPhotonics Initiative, Advanced Science Research Center, City University of New YorkGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunCollege of Computer Science and Technology, Jilin UniversityGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunCollege of Computer Science and Technology, Jilin UniversityPhotonics Initiative, Advanced Science Research Center, City University of New YorkGPL Photonics Laboratory, State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ChangchunAbstract All-optical image processing based on metasurfaces is a swiftly advancing field of technology, due to its high speed, large integrability and inherently low energy requirements. So far, the proposed devices have been focusing on canonical operations, such as differentiations to perform edge detection across all objects in a complex scene. Yet, undesired background noise and clutter can hinder such operations, requiring target selection with digital post-processing which inherently limits the overall accuracy, efficiency and speed. Here, we introduce an optical solution for real-time size-selective image processing and experimentally demonstrate the concept with a metal-dielectric-metal film performing a spatial band-pass filter in momentum space. We show high-resolution (~0.9 μm) edge detection and real-time dynamic denoising, ideally suited for bio-imaging applications and target recognitions. Our demonstrated k-space filtering metasurface expands the scope of nonlocal flat optics for analog image processing, ushering in opportunities for ultra-compact, cost-effective, and multifunctional image processors.https://doi.org/10.1038/s41467-025-59765-4 |
| spellingShingle | Sandeep Kumar Chamoli Chunqi Jin Yandong Fan Mehdi Kiani Heedong Goh Chen Huang Shuyu Guo Yuntong Wang Fei Zhu Guohua Xing Bo Li Tian Bai Andrea Alù Wei Li Nonlocal flat optics for size-selective image processing and denoising Nature Communications |
| title | Nonlocal flat optics for size-selective image processing and denoising |
| title_full | Nonlocal flat optics for size-selective image processing and denoising |
| title_fullStr | Nonlocal flat optics for size-selective image processing and denoising |
| title_full_unstemmed | Nonlocal flat optics for size-selective image processing and denoising |
| title_short | Nonlocal flat optics for size-selective image processing and denoising |
| title_sort | nonlocal flat optics for size selective image processing and denoising |
| url | https://doi.org/10.1038/s41467-025-59765-4 |
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