High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors
Microlens array (MLA) errors in plenoptic cameras can cause the confusion or mismatching of 4D spatio-angular information in the image space, significantly affecting the accuracy and efficiency of target reconstruction. In this paper, we present a high-accuracy correction method for light fields dis...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/18/3922 |
| _version_ | 1811305589271166976 |
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| author | Suning Li Yuan Yuan Ziyi Gao Heping Tan |
| author_facet | Suning Li Yuan Yuan Ziyi Gao Heping Tan |
| author_sort | Suning Li |
| collection | DOAJ |
| description | Microlens array (MLA) errors in plenoptic cameras can cause the confusion or mismatching of 4D spatio-angular information in the image space, significantly affecting the accuracy and efficiency of target reconstruction. In this paper, we present a high-accuracy correction method for light fields distorted by MLA errors. Subpixel feature points are extracted from the microlens subimages of a raw image to obtain correction matrices and perform registration of the corresponding subimages at a subpixel level. The proposed method is applied for correcting MLA errors of two different categories in light-field images, namely form errors and orientation errors. Experimental results show that the proposed method can rectify the geometric and intensity distortions of raw images accurately and improve the quality of light-field refocusing. Qualitative and quantitative comparisons between images before and after correction verify the performance of our method in terms of accuracy, stability, and adaptability. |
| first_indexed | 2024-04-13T08:29:08Z |
| format | Article |
| id | doaj.art-a023f009aebf4214b8abea87a672138e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T08:29:08Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a023f009aebf4214b8abea87a672138e2022-12-22T02:54:19ZengMDPI AGSensors1424-82202019-09-011918392210.3390/s19183922s19183922High-Accuracy Correction of a Microlens Array for Plenoptic Imaging SensorsSuning Li0Yuan Yuan1Ziyi Gao2Heping Tan3Key Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaKey Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaKey Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaKey Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaMicrolens array (MLA) errors in plenoptic cameras can cause the confusion or mismatching of 4D spatio-angular information in the image space, significantly affecting the accuracy and efficiency of target reconstruction. In this paper, we present a high-accuracy correction method for light fields distorted by MLA errors. Subpixel feature points are extracted from the microlens subimages of a raw image to obtain correction matrices and perform registration of the corresponding subimages at a subpixel level. The proposed method is applied for correcting MLA errors of two different categories in light-field images, namely form errors and orientation errors. Experimental results show that the proposed method can rectify the geometric and intensity distortions of raw images accurately and improve the quality of light-field refocusing. Qualitative and quantitative comparisons between images before and after correction verify the performance of our method in terms of accuracy, stability, and adaptability.https://www.mdpi.com/1424-8220/19/18/3922plenoptic cameramicrolens arrayerror correctionlight-field image processing |
| spellingShingle | Suning Li Yuan Yuan Ziyi Gao Heping Tan High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors Sensors plenoptic camera microlens array error correction light-field image processing |
| title | High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors |
| title_full | High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors |
| title_fullStr | High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors |
| title_full_unstemmed | High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors |
| title_short | High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors |
| title_sort | high accuracy correction of a microlens array for plenoptic imaging sensors |
| topic | plenoptic camera microlens array error correction light-field image processing |
| url | https://www.mdpi.com/1424-8220/19/18/3922 |
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