Baseline-free structured light 3D imaging using a metasurface double-helix dot projector
Structured light is a widely used 3D imaging method with a drawback that it typically requires a long baseline length between the laser projector and the camera sensor, which hinders its utilization in space-constrained scenarios. On the other hand, the application of passive 3D imaging methods, suc...
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-02-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0668 |
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| author | Shen Zicheng Ni Yibo Yang Yuanmu |
| author_facet | Shen Zicheng Ni Yibo Yang Yuanmu |
| author_sort | Shen Zicheng |
| collection | DOAJ |
| description | Structured light is a widely used 3D imaging method with a drawback that it typically requires a long baseline length between the laser projector and the camera sensor, which hinders its utilization in space-constrained scenarios. On the other hand, the application of passive 3D imaging methods, such as depth from depth-dependent point spread functions (PSFs), is impeded by the challenge in measuring textureless scenes. Here, we combine the advantages of both structured light and depth-dependent PSFs and propose a baseline-free structured light 3D imaging system. A metasurface is designed to project a structured dot array and encode depth information in the double-helix pattern of each dot simultaneously. Combined with a straightforward and fast algorithm, we demonstrate accurate 3D point cloud acquisition for various real-world scenarios including multiple cardboard boxes and a living human face. Such a technique may find application in a broad range of areas including consumer electronics and precision metrology. |
| format | Article |
| id | doaj-art-cef7e316310d4ff495a7aabff77c32a3 |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-cef7e316310d4ff495a7aabff77c32a32025-08-20T02:28:49ZengDe GruyterNanophotonics2192-86142025-02-011481265127210.1515/nanoph-2024-0668Baseline-free structured light 3D imaging using a metasurface double-helix dot projectorShen Zicheng0Ni Yibo1Yang Yuanmu2State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, 12442Tsinghua University, Beijing100084, ChinaState Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, 12442Tsinghua University, Beijing100084, ChinaState Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, 12442Tsinghua University, Beijing100084, ChinaStructured light is a widely used 3D imaging method with a drawback that it typically requires a long baseline length between the laser projector and the camera sensor, which hinders its utilization in space-constrained scenarios. On the other hand, the application of passive 3D imaging methods, such as depth from depth-dependent point spread functions (PSFs), is impeded by the challenge in measuring textureless scenes. Here, we combine the advantages of both structured light and depth-dependent PSFs and propose a baseline-free structured light 3D imaging system. A metasurface is designed to project a structured dot array and encode depth information in the double-helix pattern of each dot simultaneously. Combined with a straightforward and fast algorithm, we demonstrate accurate 3D point cloud acquisition for various real-world scenarios including multiple cardboard boxes and a living human face. Such a technique may find application in a broad range of areas including consumer electronics and precision metrology.https://doi.org/10.1515/nanoph-2024-0668structured light 3d imagingbaseline-freemetasurface double-helix dot projector |
| spellingShingle | Shen Zicheng Ni Yibo Yang Yuanmu Baseline-free structured light 3D imaging using a metasurface double-helix dot projector Nanophotonics structured light 3d imaging baseline-free metasurface double-helix dot projector |
| title | Baseline-free structured light 3D imaging using a metasurface double-helix dot projector |
| title_full | Baseline-free structured light 3D imaging using a metasurface double-helix dot projector |
| title_fullStr | Baseline-free structured light 3D imaging using a metasurface double-helix dot projector |
| title_full_unstemmed | Baseline-free structured light 3D imaging using a metasurface double-helix dot projector |
| title_short | Baseline-free structured light 3D imaging using a metasurface double-helix dot projector |
| title_sort | baseline free structured light 3d imaging using a metasurface double helix dot projector |
| topic | structured light 3d imaging baseline-free metasurface double-helix dot projector |
| url | https://doi.org/10.1515/nanoph-2024-0668 |
| work_keys_str_mv | AT shenzicheng baselinefreestructuredlight3dimagingusingametasurfacedoublehelixdotprojector AT niyibo baselinefreestructuredlight3dimagingusingametasurfacedoublehelixdotprojector AT yangyuanmu baselinefreestructuredlight3dimagingusingametasurfacedoublehelixdotprojector |