Volumetric calibration of a plenoptic camera
Abstract
Here, the volumetric calibration of a plenoptic camera is explored to correct for inaccuracies due to real-world lens distortions and thin-lens assumptions in current processing methods. Two methods of volumetric calibration based on a polynomial mapping function that does not require knowledge of specific lens parameters are presented and compared to a calibration based on thin-lens assumptions. The first method, volumetric dewarping, is executed by creation of a volumetric representation of a scene using the thin-lens assumptions, which is then corrected in post-processing using a polynomial mapping function. The second method, direct light-field calibration, uses the polynomial mapping in creation of the initial volumetric representation to relate locations in object space directly to image sensor locations. The accuracy and feasibility of these methods is examined experimentally by capturing images of a known dot card at a variety of depths. Results suggest that use of a 3D polynomial mapping function provides a significant increase in reconstruction accuracy and that the achievable accuracy is similar using either polynomial-mapping-based method. Additionally, direct light-field calibration provides significant computational benefits by eliminating some intermediate processing steps found in other methods. Finally, the flexibility of this method is shown for a nonplanar calibration.
- Authors:
-
- Auburn Univ., Auburn, AL (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Auburn Univ., Auburn, AL (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1421765
- Alternate Identifier(s):
- OSTI ID: 1418726
- Report Number(s):
- SAND-2018-0806J
Journal ID: ISSN 1559-128X; APOPAI; 660487
- Grant/Contract Number:
- AC04-94AL85000; NA0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Optics
- Additional Journal Information:
- Journal Volume: 57; Journal Issue: 4; Journal ID: ISSN 1559-128X
- Publisher:
- Optical Society of America
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; three-dimensional image processing; three-dimensional image acquisition
Citation Formats
Hall, Elise Munz, Fahringer, Timothy W., Guildenbecher, Daniel Robert, and Thurow, Brian S. Volumetric calibration of a plenoptic camera. United States: N. p., 2018.
Web. doi:10.1364/AO.57.000914.
Hall, Elise Munz, Fahringer, Timothy W., Guildenbecher, Daniel Robert, & Thurow, Brian S. Volumetric calibration of a plenoptic camera. United States. https://doi.org/10.1364/AO.57.000914
Hall, Elise Munz, Fahringer, Timothy W., Guildenbecher, Daniel Robert, and Thurow, Brian S. Thu .
"Volumetric calibration of a plenoptic camera". United States. https://doi.org/10.1364/AO.57.000914. https://www.osti.gov/servlets/purl/1421765.
@article{osti_1421765,
title = {Volumetric calibration of a plenoptic camera},
author = {Hall, Elise Munz and Fahringer, Timothy W. and Guildenbecher, Daniel Robert and Thurow, Brian S.},
abstractNote = {Here, the volumetric calibration of a plenoptic camera is explored to correct for inaccuracies due to real-world lens distortions and thin-lens assumptions in current processing methods. Two methods of volumetric calibration based on a polynomial mapping function that does not require knowledge of specific lens parameters are presented and compared to a calibration based on thin-lens assumptions. The first method, volumetric dewarping, is executed by creation of a volumetric representation of a scene using the thin-lens assumptions, which is then corrected in post-processing using a polynomial mapping function. The second method, direct light-field calibration, uses the polynomial mapping in creation of the initial volumetric representation to relate locations in object space directly to image sensor locations. The accuracy and feasibility of these methods is examined experimentally by capturing images of a known dot card at a variety of depths. Results suggest that use of a 3D polynomial mapping function provides a significant increase in reconstruction accuracy and that the achievable accuracy is similar using either polynomial-mapping-based method. Additionally, direct light-field calibration provides significant computational benefits by eliminating some intermediate processing steps found in other methods. Finally, the flexibility of this method is shown for a nonplanar calibration.},
doi = {10.1364/AO.57.000914},
journal = {Applied Optics},
number = 4,
volume = 57,
place = {United States},
year = {2018},
month = {2}
}
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Cited by: 6 works
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Figures / Tables:
Figure 1: Schematic depicting plenoptic imaging.
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Works referencing / citing this record:
Volumetric calibration enhancements for single-camera light-field PIV
journal, January 2019
- Shi, Shengxian; Ding, Junfei; New, T. H.
- Experiments in Fluids, Vol. 60, Issue 1
Plenoptic particle image velocimetry with multiple plenoptic cameras
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Depth-of-field reduction due to blurring in a relayed plenoptic camera and mitigation via deconvolution
journal, January 2020
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Three-dimensional extent of flow stagnation in transcatheter heart valves
journal, May 2019
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Development and uncertainty characterization of 3D particle location from perspective shifted plenoptic images
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Development of a modular, high-speed plenoptic-camera for 3D flow-measurement
journal, January 2019
- Tan, Zu Puayen; Johnson, Kyle; Clifford, Chris
- Optics Express, Vol. 27, Issue 9
Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.