Abstract
One of the problems in using HMDs is that the virtual images shown through the HMDs are usually warped due to their optical distortions. In order to correctly compensate the optical distortions through a predistortion technique, accurate values of the distortion parameters are required. Although several distortion calibration methods have been developed in prior work, these methods have some limitations. In this paper, we propose a method for accurately estimating the optical distortion parameters of both immersive and (optical) see-through HMDs, without the limitations. The proposed method is based on photogrammetry and considers not only the radial distortion but also the tangential distortion. Its effectiveness, including the effects of different coefficient orders of radial and tangential distortions, are evaluated through an experiment conducted with two different HMDs, an optical see-through head-mounted projection display (HMPD) and a commercially available immersive HMD. According to the experimental results, the proposed method showed significantly lower reprojection and line-fitting errors than a previous method proposed by Owen , and the radial distortion coefficients estimated by the proposed method were significantly more accurate than the nominal values obtained from the HMD optics prescription. In addition, when both the radial and tangential distortions were considered, the proposed method was significantly more effective than when only the radial distortion was considered. We also discuss an OpenCV-based simple implementation of a distortion correction method.
| Original language | English (US) |
|---|---|
| Article number | 6997996 |
| Pages (from-to) | 845-853 |
| Number of pages | 9 |
| Journal | IEEE/OSA Journal of Display Technology |
| Volume | 11 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 1 2015 |
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Keywords
- Geometric calibration
- head-mounted display (HMD)
- optical distortion
- photogrammetry
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
A Robust Camera-Based Method for Optical Distortion Calibration of Head-Mounted Displays. / Lee, Sangyoon; Hua, Hong.
In: IEEE/OSA Journal of Display Technology, Vol. 11, No. 10, 6997996, 01.10.2015, p. 845-853.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A Robust Camera-Based Method for Optical Distortion Calibration of Head-Mounted Displays
AU - Lee, Sangyoon
AU - Hua, Hong
PY - 2015/10/1
Y1 - 2015/10/1
N2 - One of the problems in using HMDs is that the virtual images shown through the HMDs are usually warped due to their optical distortions. In order to correctly compensate the optical distortions through a predistortion technique, accurate values of the distortion parameters are required. Although several distortion calibration methods have been developed in prior work, these methods have some limitations. In this paper, we propose a method for accurately estimating the optical distortion parameters of both immersive and (optical) see-through HMDs, without the limitations. The proposed method is based on photogrammetry and considers not only the radial distortion but also the tangential distortion. Its effectiveness, including the effects of different coefficient orders of radial and tangential distortions, are evaluated through an experiment conducted with two different HMDs, an optical see-through head-mounted projection display (HMPD) and a commercially available immersive HMD. According to the experimental results, the proposed method showed significantly lower reprojection and line-fitting errors than a previous method proposed by Owen , and the radial distortion coefficients estimated by the proposed method were significantly more accurate than the nominal values obtained from the HMD optics prescription. In addition, when both the radial and tangential distortions were considered, the proposed method was significantly more effective than when only the radial distortion was considered. We also discuss an OpenCV-based simple implementation of a distortion correction method.
AB - One of the problems in using HMDs is that the virtual images shown through the HMDs are usually warped due to their optical distortions. In order to correctly compensate the optical distortions through a predistortion technique, accurate values of the distortion parameters are required. Although several distortion calibration methods have been developed in prior work, these methods have some limitations. In this paper, we propose a method for accurately estimating the optical distortion parameters of both immersive and (optical) see-through HMDs, without the limitations. The proposed method is based on photogrammetry and considers not only the radial distortion but also the tangential distortion. Its effectiveness, including the effects of different coefficient orders of radial and tangential distortions, are evaluated through an experiment conducted with two different HMDs, an optical see-through head-mounted projection display (HMPD) and a commercially available immersive HMD. According to the experimental results, the proposed method showed significantly lower reprojection and line-fitting errors than a previous method proposed by Owen , and the radial distortion coefficients estimated by the proposed method were significantly more accurate than the nominal values obtained from the HMD optics prescription. In addition, when both the radial and tangential distortions were considered, the proposed method was significantly more effective than when only the radial distortion was considered. We also discuss an OpenCV-based simple implementation of a distortion correction method.
KW - Geometric calibration
KW - head-mounted display (HMD)
KW - optical distortion
KW - photogrammetry
UR - http://www.scopus.com/inward/record.url?scp=84944058933&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84944058933&partnerID=8YFLogxK
U2 - 10.1109/JDT.2014.2386216
DO - 10.1109/JDT.2014.2386216
M3 - Article
AN - SCOPUS:84944058933
VL - 11
SP - 845
EP - 853
JO - IEEE/OSA Journal of Display Technology
JF - IEEE/OSA Journal of Display Technology
SN - 1551-319X
IS - 10
M1 - 6997996
ER -