A new method for improving camera calibration precision

Author

Lu, Linlin ; Dong, Fangmin ; Xia, Daoping ; Yao, Gang

Author_Institution

Inst. of Intell. Vision & Image Inf., China Three Gorges Univ., Yichang, China

Volume

3

fYear

2010

fDate

22-24 Oct. 2010

Abstract

The camera calibration precision directly affects the computer vision application. A method for improving camera calibration precision is proposed in this paper, which follows in details: Firstly, a new iterative sub-pixel detection approach based on the Forstner operator is proposed. Secondly, instead of print plane, this paper uses LCD (completely flat Liquid Crystal Display) for camera calibration. Finally, a new distortion correction method using image corners is proposed, which is based on the fact that the straight line is still straight in projective transformation. This method could be used to compute the radial distortion coefficients, and correct the corners location. Both simulation and real experiments show the effectiveness of the proposed method.

Keywords

computer vision; iterative methods; liquid crystal displays; Forstner operator; LCD; camera calibration precision improvement; computer vision application; distortion correction method; image corners; iterative subpixel detection approach; liquid crystal display; print plane; radial distortion coefficients; Calibration; Cameras; Equations; Mathematical model; Forstner; LCD; camera calibration; distortion correction; sub-pixel;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Application and System Modeling (ICCASM), 2010 International Conference on

Conference_Location

Taiyuan

Print_ISBN

978-1-4244-7235-2

Electronic_ISBN

978-1-4244-7237-6

Type

conf

DOI

10.1109/ICCASM.2010.5620706

Filename

5620706