Enhanced light-field image resolution via MLA translation
This work describes a method that effectively improves the spatial resolution of light-field images without sacrificing angular resolution. The method involves translating the microlens array (MLA) linearly in both x- and y-directions in multiple steps to achieve 4 ×, 9 ×, 16 × and 25 × spatial reso...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/171472 |
| _version_ | 1811686003583221760 |
|---|---|
| author | Shi, Shengxian Zhou, Hongyu Yu, Chengshuai Xu, Shengming Wang, Rui Ji, Yu New, Tze How Zhao, Zhou |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Shi, Shengxian Zhou, Hongyu Yu, Chengshuai Xu, Shengming Wang, Rui Ji, Yu New, Tze How Zhao, Zhou |
| author_sort | Shi, Shengxian |
| collection | NTU |
| description | This work describes a method that effectively improves the spatial resolution of light-field images without sacrificing angular resolution. The method involves translating the microlens array (MLA) linearly in both x- and y-directions in multiple steps to achieve 4 ×, 9 ×, 16 × and 25 × spatial resolution improvements. Its effectiveness was firstly validated through simulations with synthetic light-field images, demonstrating that distinct spatial resolution increments can be achieved by shifting the MLA. An MLA-translation light-field camera was built based on an industrial light-field camera, with which detailed experimental tests were carried out on a 1951 USAF resolution chart and a calibration plate. Qualitative and quantitative results prove that MLA translations can significantly improve measurement accuracy in x- and y- directions while preserving z-direction accuracy. Finally, the MLA-translation light-field camera was used to image a MEMS chip to demonstrate that finer structures of the chip can be acquired successfully. |
| first_indexed | 2024-10-01T04:53:30Z |
| format | Journal Article |
| id | ntu-10356/171472 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:53:30Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1714722023-10-28T16:47:55Z Enhanced light-field image resolution via MLA translation Shi, Shengxian Zhou, Hongyu Yu, Chengshuai Xu, Shengming Wang, Rui Ji, Yu New, Tze How Zhao, Zhou School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering 3D Shape Spatial Resolution This work describes a method that effectively improves the spatial resolution of light-field images without sacrificing angular resolution. The method involves translating the microlens array (MLA) linearly in both x- and y-directions in multiple steps to achieve 4 ×, 9 ×, 16 × and 25 × spatial resolution improvements. Its effectiveness was firstly validated through simulations with synthetic light-field images, demonstrating that distinct spatial resolution increments can be achieved by shifting the MLA. An MLA-translation light-field camera was built based on an industrial light-field camera, with which detailed experimental tests were carried out on a 1951 USAF resolution chart and a calibration plate. Qualitative and quantitative results prove that MLA translations can significantly improve measurement accuracy in x- and y- directions while preserving z-direction accuracy. Finally, the MLA-translation light-field camera was used to image a MEMS chip to demonstrate that finer structures of the chip can be acquired successfully. Published version This work was funded by National Natural Science Foundation of China (12172222) ; Aero Engine Corporation of China (HFZL2020 CXY014-2) ; Fundamental Research Funds for the Central Universities. 2023-10-26T01:20:07Z 2023-10-26T01:20:07Z 2023 Journal Article Shi, S., Zhou, H., Yu, C., Xu, S., Wang, R., Ji, Y., New, T. H. & Zhao, Z. (2023). Enhanced light-field image resolution via MLA translation. Optics Express, 31(10), 17087-17097. https://dx.doi.org/10.1364/OE.492189 1094-4087 https://hdl.handle.net/10356/171472 10.1364/OE.492189 37157772 2-s2.0-85158087168 10 31 17087 17097 en Optics Express © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement. application/pdf |
| spellingShingle | Engineering::Mechanical engineering 3D Shape Spatial Resolution Shi, Shengxian Zhou, Hongyu Yu, Chengshuai Xu, Shengming Wang, Rui Ji, Yu New, Tze How Zhao, Zhou Enhanced light-field image resolution via MLA translation |
| title | Enhanced light-field image resolution via MLA translation |
| title_full | Enhanced light-field image resolution via MLA translation |
| title_fullStr | Enhanced light-field image resolution via MLA translation |
| title_full_unstemmed | Enhanced light-field image resolution via MLA translation |
| title_short | Enhanced light-field image resolution via MLA translation |
| title_sort | enhanced light field image resolution via mla translation |
| topic | Engineering::Mechanical engineering 3D Shape Spatial Resolution |
| url | https://hdl.handle.net/10356/171472 |
| work_keys_str_mv | AT shishengxian enhancedlightfieldimageresolutionviamlatranslation AT zhouhongyu enhancedlightfieldimageresolutionviamlatranslation AT yuchengshuai enhancedlightfieldimageresolutionviamlatranslation AT xushengming enhancedlightfieldimageresolutionviamlatranslation AT wangrui enhancedlightfieldimageresolutionviamlatranslation AT jiyu enhancedlightfieldimageresolutionviamlatranslation AT newtzehow enhancedlightfieldimageresolutionviamlatranslation AT zhaozhou enhancedlightfieldimageresolutionviamlatranslation |