Publication Details

Automatic Camera Calibration by Landmarks on Rigid Objects

BARTL Vojtěch, ŠPAŇHEL Jakub, DOBEŠ Petr, JURÁNEK Roman and HEROUT Adam. Automatic Camera Calibration by Landmarks on Rigid Objects. Machine Vision and Applications, vol. 32, no. 1, 2020, pp. 2-15. ISSN 1432-1769.
Czech title
Automatická kalibrace kamery pomocí význačných bodů na rigidních objektech
Type
journal article
Language
english
Authors
Keywords

camera calibration, optimization, surveillance

Abstract

This article presents a new method for automatic calibration of surveillance cameras. We are dealing with traffic surveillance and therefore the camera is calibrated by observing vehicles; however, other rigid objects can be used instead. The proposed method is using keypoints or landmarks automatically detected on the observed objects by a convolutional neural network. By using fine-grained recognition of the vehicles (calibration objects), and by knowing the 3D positions of the landmarks for the (very limited) set of known objects, the extracted keypoints are used for calibration of the camera, resulting in internal (focal length) and external (rotation, translation) parameters and scene scale of the surveillance camera. We collected a dataset in two parking lots and equipped it with a calibration ground truth by measuring multiple distances in the ground plane. This dataset seems to be more accurate than the existing comparable data (GT calibration error reduced from 4.62% to 0.99%). Also, the experiments show that our method overcomes the best existing alternative in terms of accuracy (error reduced from 6.56% to 4.03%) and our solution is also more flexible in terms of viewpoint change and other.

Published
2020
Pages
2-15
Journal
Machine Vision and Applications, vol. 32, no. 1, ISSN 1432-1769
Book
Machine Vision and Applications
Publisher
Springer International Publishing
DOI
UT WoS
000575425400001
EID Scopus
BibTeX
@ARTICLE{FITPUB12345,
   author = "Vojt\v{e}ch Bartl and Jakub \v{S}pa\v{n}hel and Petr Dobe\v{s} and Roman Jur\'{a}nek and Adam Herout",
   title = "Automatic Camera Calibration by Landmarks on Rigid Objects",
   pages = "2--15",
   booktitle = "Machine Vision and Applications",
   journal = "Machine Vision and Applications",
   volume = 32,
   number = 1,
   year = 2020,
   publisher = "Springer International Publishing",
   ISSN = "1432-1769",
   doi = "10.1007/s00138-020-01125-x",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/12345"
}
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