The DOI matches its Crossref record; 20 of the 20 references it cites were found in a registry or an index.
A Convenient Multicamera Self-Calibration for Virtual Environments
Abstract
Virtual immersive environments or telepresence setups often consist of multiple cameras that have to be calibrated. We present a convenient method for doing this. The minimum is three cameras, but there is no upper limit. The method is fully automatic and a freely moving bright spot is the only calibration object. A set of virtual 3D points is made by waving the bright spot through the working volume. Its projections are found with subpixel precision and verified by a robust RANSAC analysis. The cameras do not have to see all points; only reasonable overlap between camera subgroups is necessary. Projective structures are computed via rank-4 factorization and the Euclidean stratification is done by imposing geometric constraints. This linear estimate initializes a postprocessing computation of nonlinear distortion, which is also fully automatic. We suggest a trick on how to use a very ordinary laser pointer as the calibration object. We show that it is possible to calibrate an immersive virtual environment with 16 cameras in less than 60 minutes reaching about 1/5 pixel reprojection error. The method has been successfully tested on numerous multicamera environments using varying numbers of cameras of varying quality.
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Cites
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Cited by
Hedrick, T. L. (2008) · Bioinspiration & Biomimetics · doi:10.1088/1748-3182/3/3/034001 · Cited by 1,360
Plenoptic cameras in real-time robotics
Dong, F., Ieng, S.-H., Savatier, X., Etienne-Cummings, R., & Benosman, R. (2013) · The International Journal of Robotics Research · doi:10.1177/0278364912469420 · Cited by 64
Metadata
- Authors
- Svoboda, T., Martinec, D., & Pajdla, T.
- Venue
- Presence: Teleoperators and Virtual Environments
- Publisher
- MIT Press - Journals
- Published
- 2005-08
- Volume
- 14
- Issue
- 4
- Pages
- 407-422
- ISSN
- 1054-7460 (ISSN-L)
- OpenAlex
- W2149431106
- Cited by
- 485
- References
- 20
- FWCI
- 41.48
- Type
- journal article
- Language
- en
- Open access
- closed
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