Abstract
This paper describes a practical method for calibrating the geometry and colour information for cameras surveying large rooms. To calibrate the geometry, we use a semi-automatic system to assign real world to pixel coordinates. This information is the input to the Tsai camera calibration method. Our system uses a two stage process in which easily recognizable objects (squares) are used to sort the individual data points and to find missing objects. Fine object features (corners) are used in a second step to determine the object’s real world coordinates. An empirical evaluation of the system shows that the average and maximum errors are sufficiently small for our domain. Objects are recognized through coloured spots. The colour calibration uses six thresholds (Three colour ranges (Red, Green, and Blue) and three colour differences (Red - Green, Red - Blue, Green - Blue)). This paper describes a fast threshold comparison routine.
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References
Jacky Baltes. Aucklandianapolis homepage. WWW, February 1998. http://-www.tcs.auckland.ac.nz/~jacky/teaching/courses/415.703/aucklandianapolis/-index.html.
Jacky Baltes, Nich Hildreth, Robin Otte, and Yuming Lin. The all botz team description. In Proceedings of the PRICAI Workshop on RoboCup, 1998.
K.S. Fu, R.C. Gonzales, and C. S. G. Lee. Robotics: Control Sensing, Vision, and Intelligence, chapter 7.4, pages 306–324. McGraw Hill, 1987.
Hiroaki Kitano, editor. RoboCup-97: Robot Soccer World Cup I. Springer Verlag, 1998.
Alan Mackworth. Computer Vision: System, Theory, and Applications, chapter 1, pages 1–13. World Scientific Press, Singapore, 1993.
C.J. Merz and P.M. Murphy. UCI repository of machine learning databases, 1998.
Roger Y. Tsai. A versatile camera calibration technique for high-accuracy 3d machine vision metrology using off-the-shelf tv cameras and lenses. IEEE Journal of Robotics and Automation, RA-3(4):323–344, August 1987.
Robert J. Valkenburg, Alan M. McIvor, and P. Wayne Power. An evaluation of subpixel feature localisation methods for precision measurement. In Videometrics III, volume SPIE 2350, pages 229–238, 1994.
Reg Willson. Tsai camera calibration software. WWW, 1995.
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Baltes, J. (2000). Practical Camera and Colour Calibration for Large Rooms. In: Veloso, M., Pagello, E., Kitano, H. (eds) RoboCup-99: Robot Soccer World Cup III. RoboCup 1999. Lecture Notes in Computer Science(), vol 1856. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45327-X_11
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DOI: https://doi.org/10.1007/3-540-45327-X_11
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