Calibration of an outdoor active camera system

A parametric camera model and calibration procedures are developed for an outdoor active camera system with pan, tilt and zoom control. Unlike traditional methods, active camera motion plays a key role in the calibration process, and no special laboratory setups are required. Intrinsic parameters are estimated automatically by fitting parametric models to the optic flow induced by rotating and zooming. No knowledge of 3D scene structure is needed. Extrinsic parameters are calculated by actively rotating the camera to sight a sparse set of surveyed landmarks over a virtual hemispherical field of view, yielding a well-conditioned pose estimation problem.

[1]  Roger Y. Tsai,et al.  A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses , 1987, IEEE J. Robotics Autom..

[2]  Allen R. Hanson,et al.  Robust methods for estimating pose and a sensitivity analysis , 1994 .

[3]  Xinhua Zhuang,et al.  Pose estimation from corresponding point data , 1989, IEEE Trans. Syst. Man Cybern..

[4]  Richard I. Hartley.  Self-Calibration from Multiple Views with a Rotating Camera , 1994, ECCV.

[5]  Jean-Marc Lavest,et al.  Some Aspects of Zoom Lens Camera Calibration , 1996, IEEE Trans. Pattern Anal. Mach. Intell..

[6]  Steven A. Shafer,et al.  What is the center of the image? , 1993, Proceedings of IEEE Conference on Computer Vision and Pattern Recognition.

[7]  Anup Basu,et al.  Active camera calibration using pan, tilt and roll , 1997, IEEE Trans. Syst. Man Cybern. Part B.

[8]  Reg G. Willson.  Modeling and calibration of automated zoom lenses , 1994, Other Conferences.

[9]  Takeo Kanade,et al.  A stereo machine for video-rate dense depth mapping and its new applications , 1996, Proceedings CVPR IEEE Computer Society Conference on Computer Vision and Pattern Recognition.

[10]  Berthold K. P. Horn,et al.  Closed-form solution of absolute orientation using unit quaternions , 1987 .

[11]  Gideon P. Stein.  Accurate internal camera calibration using rotation, with analysis of sources of error , 1995, Proceedings of IEEE International Conference on Computer Vision.

[12]  P. Anandan,et al.  Hierarchical Model-Based Motion Estimation , 1992, ECCV.

[13]  Anup Basu,et al.  Active camera calibration using pan, tilt and roll , 1995, Proceedings of 1995 IEEE International Conference on Robotics and Automation.

[14]  Daniel E. Stevenson,et al.  Robot aerobics: four easy steps to a more flexible calibration , 1995, Proceedings of IEEE International Conference on Computer Vision.