ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., III-3, 449-456, 2016
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/III-3/449/2016/
doi:10.5194/isprs-annals-III-3-449-2016
 
06 Jun 2016
METRIC CALIBRATION OF A FOCUSED PLENOPTIC CAMERA BASED ON A 3D CALIBRATION TARGET
N. Zeller1,3, C. A. Noury2,4, F. Quint1, C. Teulière2,4, U. Stilla3, and M. Dhome2,4 1Karlsruhe University of Applied Sciences, 76133 Karlsruhe, Germany
2Université Clermont Auvergne, Université Blaise Pascal, Institut Pascal, BP 10448, 63000 Clermont-Ferrand, France
3Technische Universität München, Germany, 80290 Munich, Germany
4CNRS, UMR 6602, IP, 63178 Aubière, France
Keywords: Bundle adjustment, depth accuracy, depth distortion model, focused plenoptic camera, metric camera calibration Abstract. In this paper we present a new calibration approach for focused plenoptic cameras. We derive a new mathematical projection model of a focused plenoptic camera which considers lateral as well as depth distortion. Therefore, we derive a new depth distortion model directly from the theory of depth estimation in a focused plenoptic camera. In total the model consists of five intrinsic parameters, the parameters for radial and tangential distortion in the image plane and two new depth distortion parameters. In the proposed calibration we perform a complete bundle adjustment based on a 3D calibration target. The residual of our optimization approach is three dimensional, where the depth residual is defined by a scaled version of the inverse virtual depth difference and thus conforms well to the measured data. Our method is evaluated based on different camera setups and shows good accuracy. For a better characterization of our approach we evaluate the accuracy of virtual image points projected back to 3D space.
Conference paper (PDF, 2696 KB)


Citation: Zeller, N., Noury, C. A., Quint, F., Teulière, C., Stilla, U., and Dhome, M.: METRIC CALIBRATION OF A FOCUSED PLENOPTIC CAMERA BASED ON A 3D CALIBRATION TARGET, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., III-3, 449-456, doi:10.5194/isprs-annals-III-3-449-2016, 2016.

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