Automatic Camera Calibration

Our open-source software FAUCCAL (Fully Automatic Camera Calibration) is freely available on the Internet since 2009. Input is simply different images of standard chess-board patterns; the software then proceeds automatically to produce calibration results and statistical data for camera parameters selected by the user. With this software, feature points are first ex­tracted with a Harris operator, among which valid pattern nodes are separated and sub­sequently ordered in columns and rows in correspondence with pattern nodes. Initial values for all unknown parameters are estimated automatically. Based on the established point cor­respondences and initial values, a final bundle adjustment allows fully recovering – without use of any external information – the camera geometry parameters selected by the user. Be­sides camera constant, principal point location and radial-symmetric lens distortion poly­no­mial, these may include decentering lens distortion, image aspect ratio and skewness. Gra­phi­cal output is also provided. The FAUCCAL site provides users with the source code in Matlab, detailed documentation of the software (including tips), links to bibliographical re­ferences and an image test dataset with results.FAUCCAL can be downloaded at:

http://portal.survey.ntua.gr/main/labs/photo/staff/gkarras/fauccal.html

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2012 Automatic calibration of stereo-cameras using ordinary chess-board patterns. A. Prokos, I. Kalisperakis, E. Petsa, G. Karras. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. XXXVIII, Part 5, pp. 45-49.

2009 FAUCCAL: An Open Source Toolbox for Fully Automatic Camera Calibration. V. Dou­skos, L. Grammatikopoulos, I. Kalisperakis, G. Karras, E. Petsa, XXII CIPA Symposium on Digital Documentation, Interpretation & Presen­ta­tion of Cultural Heritage, October 11-15, 2009, Kyoto

2008 Fully automatic camera calibration using regular planar patterns. V. Douskos, I. Kali­spe­rakis, G. Karras, E. Petsa. International Archives of Photogrammetry, Remote Sensisng and the Spatial Information Sciences, vol. 37(5), pp. 21-26

2007 Automatic calibration of digital cameras using planar chess-board patterns. V. Douskos, I. Kalisperakis, G. Karras. Optical 3-D Measurement Techniques VIII, Wichman, vol. 1, pp.132-140.