Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays
This paper describes an image enhancement method of computational reconstruction for 3-D images with multiple parallax image arrays in diffraction grating imaging. A 3-D imaging system via a diffraction grating provides a parallax image array (PIA) which is a set of perspective images of 3-D objects...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/18/5137 |
| _version_ | 1797554107962097664 |
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| author | Jae-Young Jang Hoon Yoo |
| author_facet | Jae-Young Jang Hoon Yoo |
| author_sort | Jae-Young Jang |
| collection | DOAJ |
| description | This paper describes an image enhancement method of computational reconstruction for 3-D images with multiple parallax image arrays in diffraction grating imaging. A 3-D imaging system via a diffraction grating provides a parallax image array (PIA) which is a set of perspective images of 3-D objects. The parallax images obtained from diffraction grating imaging are free from optical aberrations such as spherical aberrations that are always involved in the 3-D imaging via a lens array. The diffraction grating imaging system for 3-D imaging also can be made at a lower cost system than a camera array system. However, the parallax images suffer from the speckle noise due to a coherent source; also, the noise degrades image quality in 3-D imaging. To remedy this problem, we propose a 3-D computational reconstruction method based on multiple parallax image arrays which are acquired by moving a diffraction grating axially. The proposed method consists of a spatial filtering process for each PIA and an overlapping process. Additionally, we provide theoretical analyses through geometric and wave optics. Optical experiments are conducted to evaluate our method. The experimental results indicate that the proposed method is superior to the existing method in 3-D imaging using a diffraction grating. |
| first_indexed | 2024-03-10T16:27:03Z |
| format | Article |
| id | doaj.art-0e2d411bd3e44e62b686ae3acb56aab1 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T16:27:03Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-0e2d411bd3e44e62b686ae3acb56aab12023-11-20T13:07:04ZengMDPI AGSensors1424-82202020-09-012018513710.3390/s20185137Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image ArraysJae-Young Jang0Hoon Yoo1Department of Optometry, Eulji University, 553, Sanseong-daero, Sujeong-gu, Seongnam-si, Gyonggi-do 13135, KoreaDepartment of Electronics Engineering, Sangmyung University, 20 Hongjimoon-2gil, Jongno-gu, Seoul 03015, KoreaThis paper describes an image enhancement method of computational reconstruction for 3-D images with multiple parallax image arrays in diffraction grating imaging. A 3-D imaging system via a diffraction grating provides a parallax image array (PIA) which is a set of perspective images of 3-D objects. The parallax images obtained from diffraction grating imaging are free from optical aberrations such as spherical aberrations that are always involved in the 3-D imaging via a lens array. The diffraction grating imaging system for 3-D imaging also can be made at a lower cost system than a camera array system. However, the parallax images suffer from the speckle noise due to a coherent source; also, the noise degrades image quality in 3-D imaging. To remedy this problem, we propose a 3-D computational reconstruction method based on multiple parallax image arrays which are acquired by moving a diffraction grating axially. The proposed method consists of a spatial filtering process for each PIA and an overlapping process. Additionally, we provide theoretical analyses through geometric and wave optics. Optical experiments are conducted to evaluate our method. The experimental results indicate that the proposed method is superior to the existing method in 3-D imaging using a diffraction grating.https://www.mdpi.com/1424-8220/20/18/5137image enhancement3-D computational reconstructiondiffraction grating imagingmultiple parallax image arrays |
| spellingShingle | Jae-Young Jang Hoon Yoo Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays Sensors image enhancement 3-D computational reconstruction diffraction grating imaging multiple parallax image arrays |
| title | Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays |
| title_full | Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays |
| title_fullStr | Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays |
| title_full_unstemmed | Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays |
| title_short | Image Enhancement of Computational Reconstruction in Diffraction Grating Imaging Using Multiple Parallax Image Arrays |
| title_sort | image enhancement of computational reconstruction in diffraction grating imaging using multiple parallax image arrays |
| topic | image enhancement 3-D computational reconstruction diffraction grating imaging multiple parallax image arrays |
| url | https://www.mdpi.com/1424-8220/20/18/5137 |
| work_keys_str_mv | AT jaeyoungjang imageenhancementofcomputationalreconstructionindiffractiongratingimagingusingmultipleparallaximagearrays AT hoonyoo imageenhancementofcomputationalreconstructionindiffractiongratingimagingusingmultipleparallaximagearrays |