1. Barreto, J., Araujo, H.: A general framework for the selection of world coordinate systems in perspective and catadioptric imaging applications. Int. J. Comput. Vis. 57, 23–47 (2004)
2. Basu, A., Ravi, K.: Active camera calibration using pan, tilt and roll. IEEE Trans. Syst. Man Cybern. 27(3), 559–566 (1997)
3. Bernardin, K., van de Camp, F., Stiefelhagen, R.: Automatic person detection and tracking using fuzzy controlled active cameras. In: Proc. Comp. Vis. and Pattern Rec. (2007)
4. Black, J., Ellis, T.: Multi camera image tracking. Image Vis. Comput. 24(11), 1256–1267 (2006)
5. Collins, R., Tsin, Y.: Calibration of an outdoor active camera system. In: Proc. Comp. Vis. and Pattern Rec., pp. 528–534 (1999)