Fast camera calibration for the analysis of sport sequences

Author

Farin, Dirk ; Han, Jungong ; de With, P.H.N.

Author_Institution

Eindhoven Univ. of Technol., Netherlands

fYear

2005

fDate

6-8 July 2005

Abstract

Semantic analysis of sport sequences requires camera calibration to obtain player and ball positions in real-world coordinates. For court sports like tennis, the marker lines on the field can be used to determine the calibration parameters. We propose a real-time calibration algorithm that can be applied to all court sports simply by exchanging the court model. The algorithm is based on (1) a specialized court-line detector, (2) a RANSAC-based line parameter estimation, (3) a combinatorial optimization step to localize the court within the set of detected line segments, and (4) an iterative court-model tracking step. Our results show real-time calibration of, e.g., tennis and soccer sequences with a computation time of only about 6 ms per frame.

Keywords

calibration; cameras; combinatorial mathematics; image sequences; optimisation; parameter estimation; real-time systems; sport; tracking; RANSAC-based line parameter estimation; combinatorial optimization; court-line detector; iterative court-model tracking; line segment detection; real-time camera calibration algorithm; semantic analysis; sport sequence; Application software; Calibration; Cameras; Computer vision; Detectors; Iterative algorithms; Parameter estimation; Performance analysis; Robustness; Videos;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia and Expo, 2005. ICME 2005. IEEE International Conference on

Print_ISBN

0-7803-9331-7

Type

conf

DOI

10.1109/ICME.2005.1521465

Filename

1521465